Hunan Speeda Technology Co.,Ltd.

How Printed Circuit Board Is Made(2021年08月24日)

speedapcb — 2021-08-02T17:23:43+0900

https://www.speedapcb.com/custom-service-profile.html

The PCB manufacturing process is very important to anyone in the electronics industry, including china pcb supplier. Printed circuit boards (PCBs) are widely used as the basis of electronic circuits. Printed circuit boards are used to provide a mechanical foundation that can be used to build circuits.

The PCB board manufacturing process can be implemented in many ways, and there are many variations. Although the changes are small, the main stages of the PCB manufacturing process are the same.

Basic PCB Board Manufacturing Process
After selecting and using the bare PCB board, the next step is to create the required traces on the board and remove the unwanted copper. The manufacture of PCBs is usually achieved using chemical etching processes. The most common form of etching used on PCBs is ferric chloride.

In order to obtain the correct track pattern, photographic processing is used. Usually, the copper on the bare printed circuit board is covered by a thin layer of photoresist. Then expose it to light through a photo film or photomask, detailing the required trajectory. In this way, the image of the track is transferred to the photoresist. After completing this step, place the photoresist in the developer so that only the areas on the board that need to be routed are covered with the photoresist.

The next stage of the process is to place the printed circuit board in ferric chloride to etch areas that do not require traces or copper. After knowing the concentration of ferric chloride and the thickness of copper on the board, it takes a certain amount of time to put it in the etching foam. If the printed circuit board is left in the etching for too long, some clarity will be lost because ferric chloride will impair the performance of the photoresist.

Although most custom made circuit boards are manufactured using photographic processing, other methods can also be used. One is to use a special high-precision milling machine. Then control the machine to grind away copper in those areas where it is not needed. The control is obviously automated and driven by files generated by the PCB design software. This form of PCB manufacturing is not suitable for mass production, but it is an ideal choice in many cases, where a very small number of PCB prototypes are required.

The PCB manufacturing process is an important part of the product life cycle of electronic products. In order to meet the needs of more electronic product production and manufacturing, PCB board manufacturing has adopted many new technical fields, which have made significant improvements in reducing the size of the components and traces used and the reliability of the circuit board.

Notes for PCB Board Soldering(2021年08月23日)

speedapcb — 2021-08-02T17:23:02+0900

https://www.speedapcb.com/pcb-products/

1. There is no difference between anode and cathode in ceramic chip capacitor and voltage stabilizing diode. Anode and cathode of light emitting diodes, tantalum capacitors and electrolytic capacitors should be differentiated. For capacitors and diode components, generally, the end with obvious identification shall be cathode. In the package of SMD LED, the direction along the lamp is anode-cathode. For the package components with screen printed diode circuit diagram, the cathode of diode should be placed at one end with vertical line.

2. For the crystal oscillator, the passive crystal oscillator generally has only two pins, and there is no anode and cathode. Active crystal oscillator generally has four pins. It is necessary to pay attention to the definition of each pin to avoid soldering errors.

3. For the soldering of plug-in components, such as power module related components, the pin of the device can be modified before soldering. After the components are placed and fixed, the solder is melted by soldering iron on the back, and then the pad is integrated into the front. It is not necessary to put too much solder, and the components should be stable first.

4. During the PCB board soldering, the PCB design problems should be recorded in time by circuit board suppliers, such as incorrect pad size design and component packaging error, for subsequent improvement.

5. After soldering, the magnifying glass should be used to check the solder joint and check whether there are problems such as false soldering and short circuit.

6.After completing the pcb board soldering, clean the surface of the circuit board with the cleaning agent such as alcohol to prevent the circuit short circuit caused by the iron filings attached on the surface of the circuit board. It also makes the circuit board more clean and beautiful.

PCB Structure of Multilayer Blind and Buried Vias(2021年08月17日)

speedapcb — 2021-08-02T17:22:24+0900

https://www.speedapcb.com/multilayer-pcb/

When it comes to blind and buried vias, we can start with the traditional multilayer board. The structure of standard multilayer printed circuit board is composed of an inner circuit and outer circuit, and then the process of drilling and metallization in the hole is used to achieve the function of internal connection between each layer of circuit. However, due to the increase in circuit density, the packaging method of parts is constantly updated.

Through holes are generally divided into three types: blind and buried vias and through-holes.

Blind via, with a certain depth, is located on the top and bottom surface of the printed circuit board. It is used to connect the surface circuit and the inner circuit below. The depth and aperture of the hole usually do not exceed a certain ratio.

Buried via refers to the connecting hole in the inner layer of the printed circuit board, which does not extend to the surface of the circuit board.

Blind and buried vias are located in the inner layer of PCB. Before lamination, a through-hole is used to complete the molding process, and several inner layers may be overlapped in the process of via forming.

Through-holes, which pass through the entire circuit board, can be used for internal interconnection or as installation positioning holes for components. It is easier to realize through-hole in process and the cost is lower, so it is used in general printed circuit board.

In the traditional manufacturing process of multi-layer plate, drilling machine is used to set the depth of the z-axis after pressing, but there are several problems in this method:

a. Only one piece can be drilled at a time, and the output is very low.

b. The requirements for the levelness of drilling machine table are strict, and the setting of each drilling depth should be consistent, otherwise, it is difficult to control the depth of each hole.

c. It is difficult to electroplate in the hole. Especially if the depth is larger than the aperture, it will be almost impossible to deal well with the hole electroplating.

Hunan Speeda Technology Co.,Ltd. is a best chinese pcb manufacturer and a PCB design firm integrating production, sales and service. Products cover single-sided PCB, double-sided PCB, multilayer PCB, etc. Orders are welcome.

What are the Benefits of the Use of Pcb Board(2021年08月16日)

speedapcb — 2021-08-02T17:21:34+0900

https://www.speedapcb.com/pcb-products/
Before the use of pcb board, we should have a general understanding of PCB so that we can use it correctly and give full play to its advantages.

First of all, we should know that the copper laminate is the substrate material for PCB. In addition to supporting various components, it can also realize electrical connection or electrical insulation between them. PCB is printed circuit board. In short, it is a thin plate with integrated circuits and other electronic components. PCB boards are used in almost every kind of electronic equipment. In certain equipment, if there are electronic parts, they are inlaid on PCB boards of different sizes. In addition to fixing various small parts, the main function of PCB is to realize the electrical connection between various parts.

So what are the benefits of the use of pcb board?

1. Due to the repeatability (reproducibility) and consistency of the graphics, PCB board reduces wiring and assembly errors and saves the time of equipment maintenance, debugging and inspection;

2. PCB board has high wiring density, small size and light weight, which is conducive to the miniaturization of electronic equipment;

3. The design can be standardized, which is conducive to interchangeability;

4. It is conducive to mechanized and automatic production, improves labor productivity and reduces the cost of electronic equipment. The manufacturing methods of pcb board can be divided into subtraction method and addition method. At present, in the large-scale industrial production, the subtraction method is mainly used to corrode copper foil by circuit board suppliers.

5. Especially the bending resistance and precision of FPC flexible plate are better applied to high precision instruments (such as cameras, mobile phones).

Why is the Price of Pcb Board with Blind Via and Buried Via Higher(2021年08月10日)

speedapcb — 2021-08-02T17:20:48+0900

https://www.speedapcb.com/pcb-products/
Some customers don't understand why the price of PCB board with blind via and buried via is slightly higher. In a word, the workload of PCB board with blind via and buried via is relatively larger and the technology is a little more complicated. There may also be more problems in removing and grinding boards (more detailed which takes more time in dismantling and grinding). How the board with blind via and buried via consumes time can be seen from the process of blind via and buried via, which are as follows:

Generally, PCB with blind via and buried via is multilayer board. Blind via refers to the through hole that only extends to one surface of PCB board. Generally, the via diameter is ≤ 0.4mm, which is plated-through hole (PTH). Buried via refers to the through hole that does not extend to the surface of PCB board. Usually, the hole diameter is ≤ 0.4mm, which is plated-through hole.

Based on the miniaturization of electronic equipment, the integration of components and the high density of IC, many multilayer PCB boards are designed as blind and buried vias multilayer boards. Adopting blind via and buried via is an effective method to increase the density, reduce the number of layers and reduce the size of the board surface, and it greatly reduces the number of plated through holes.

Most of the blind vias and buried vias are small holes with a diameter of 0.05 ~ 0.15 mm. During processing, the holes are embedded in the inner thin board, and the double-sided board manufacturing process is used for manufacturing. In the manufacture of blind holes, the CNC machine for drilling small holes with z-axis depth control has been used. Now, laser drilling, plasma etching and photoionization drilling are widely used by circuit board suppliers

Can You Remember the 4 Common Sense of Basic Printed Circuit Board Testing(2021年08月09日)

speedapcb — 2021-08-02T17:19:59+0900

https://www.speedapcb.com/can-you-remember-the-4-common-sense-of-basic-printed-circuit-board-testing.html
Pay attention to some details in printed circuit board testing, so as to ensure product quality. When testing PCB board, we should pay attention to the following 9 common sense.

1.Without isolation transformer, it is strictly forbidden to use the grounded test equipment to contact the live TV, audio, video and other equipment to test PCB board.

It is strictly forbidden to directly test TV, audio, video and other equipment without power isolation transformer with grounded enclosure. Generally, radio recorders are equipped with power transformers. But when you are about to touch special TV or audio equipment, especially those with high output power or you are not familiar with the nature of power supply, it is necessary to find out whether the chassis is charged. Otherwise, it is very easy to cause power short circuit with TV, audio and other equipment with live floor, which will affect the integrated circuit and further expand the failure.

2.Pay attention to the insulation performance of electric soldering iron in printed circuit board testing

It is not allowed to use charged soldering iron to weld. Make sure that the soldering iron is not charged. It is better to ground the shell of the soldering iron, and be more careful to MOS circuit. It is safer to use low voltage circuit of 6 ~ 8V.

3.The working principle of integrated circuit and related circuit should be known before printed circuit board testing.

Before checking and repairing the integrated circuit, it is necessary to be familiar with the function of the integrated circuit, the internal circuit, the main electrical parameters, the function of each pin, and the working principle of the circuit composed of the normal voltage and waveform of the pin and the peripheral components.

4. In printed circuit board testing, do not cause short circuit between pins

When measuring voltage or testing waveform with oscilloscope probe, do not cause short circuit between IC pins due to slide of pen or probe. It is better to measure on the peripheral printed circuit directly connected with the pin. Any transient short circuit can easily damage the IC, so be more careful when testing CMOS IC with flat package.

SpeedaPCB - The best pcb manufacturers in china, established in 2014, is located in Changsha, Hunan Province. The company focuses on high speed pcb design, printed circuit board manufacturing, SMT welding processing, and supply chain services. Products are widely used in communications equipment, computers and network equipment, consumer electronics, automotive electronics, industrial control, new energy, rail transportation, and other industries.

PCB Assembly Service(2021年08月03日)

speedapcb — 2021-08-02T17:19:17+0900

https://www.speedapcb.com/pcb-assembly-service.html

The advanced circuits assembly is a substrate for assembling electronic parts and is a printed board that forms connection between points and prints components on a general-purpose base material according to a predetermined design.

The Role of PCB Assembly
The main function of electronic circuit board assembly is to make various electronic components form a predetermined circuit connection, and play the role of relay transmission. It is a key electronic interconnection of electronic products, and is known as the "mother of electronic products". PCB is used as a substrate and a key interconnection for electronic parts. Any electronic equipment or product needs to be equipped.

Assembly Service Parameters
Max BoardL50×W50mm～L510×W460mm
Max Thick Plate3mm
Min Thick Plate0.5mm
Min Chip Part150mm*150mm
Max Components SizeMax Components Placement Accuracy（100FP）
Min Pin Part Spacing0.3mm
Min BGA Spacing0.3mm
Max Components Placement Accuracy（100FP)Full placement accuracy of ±50 microns, repeatability up to ±30 microns
Mount Capability3-4 million/day
DIP Plug Processing10 million
PCB assembly is a printed circuit board assembly service. The production process of PCB is relatively complex. It involves a wide range of processes, from simple mechanical processing to complex mechanical processing. There are common chemical reactions and photochemical electrochemical thermochemical processes. Computer-aided design CAM and other knowledge. Moreover, there are many process problems in the production process and new problems will be encountered from time to time.

Some of the problems will disappear without identifying the cause. Since the production process is a discontinuous assembly line, any problem will cause the entire line to stop production. Or the consequences of a lot of scrapping. If the printed circuit board is scrapped, it cannot be recycled and reused. SPEEDPCB, as one of the best pcb manufacturers in china, has professional senior designers. Our company can also design one-to-one for customers. Experienced designers can reduce development time.

PCB Components Procurement Service(2021年08月02日)

speedapcb — 2021-08-02T17:17:35+0900

https://www.speedapcb.com/pcb-components-procurement-service.html

In the principle of all for the customer, SPEEDAPCB, as a high quality pcb manufacturer, thinks what the customer thinks, and try to avoid all the worries for the customers. SPEEDAPCB provides customers with PCB design, PCB fabrication, and PCB assembly, and also provides customers with component procurement services, such as components used in pcb , allowing customers to truly realize one-stop shopping.

PCB Components Procurement Service

Electronic components include: resistors, capacitors, inductors, potentiometers, electron tubes, radiators, electromechanical components, connectors, semiconductor discrete devices, electro-acoustic devices, laser devices, electronic display devices, optoelectronic devices, sensors, power supplies, switches, microelectronics Special motors, electronic transformers, relays, printed circuit boards, integrated circuits, various circuits, piezoelectric, crystals, quartz, ceramic magnetic materials, substrates for printed circuits, special materials for electronic functional processes, electronic glue (belt) products, electronic chemical materials, and parts. We also have all pcb components . If you are interested in pcb assembly cost per component, welcome to contact us.

SPEEDAPCB device selection advantages:

PCB Components Procurement Service

Save time

Fast response mechanism

Regular R & D purchases, packaged in two weeks

The arrival of materials, arrange immediately

SMD welding production line,

Speed up product development

Profession

Professional component certification engineer

Perfect IQC inspection system

Assist in improving customer BOM accuracy

Quality

Strict supplier access system

Strict supplier audit mechanism

Annual supplier audit mechanism

Various types of led pcb(2021年)

speedapcb — 2021-05-25T17:13:11+0900

https://www.speedapcb.com/various-types-of-led-pcb.html

Speedapcb - The best PCB manufacturers in China, established in 2014, is located in Changsha, Hunan Province. The company focuses on high-speed PCB design, printed circuit board manufacturing, SMT welding processing, and supply chain services. Products are widely used in communications equipment, computers and network equipment, consumer electronics, automotive electronics, industrial control, new energy, rail transportation, and other industries.

The printed circuit board provides a universal base for a variety of high-output LED applications. LED lighting solutions are rapidly developing in various industries, and their low power consumption, high efficiency, and impressive light output are very important. When integrated with a printed circuit board, these LEDs gain more functionality. PCBs help expand the use of LED lighting solutions, especially including displays and indicators.

We provide led cube pcb, include 12v led pcb, 9w led bulb pcb, emergency light pcb, emergency light pcb board. And the led bulb pcb price is very reasonable.

Transportation PCB Manufacturer & Assembly(2021年)

speedapcb — 2021-05-25T17:12:43+0900

https://www.speedapcb.com/transportation-pcb.html

Speedapcb - The printed circuit board company in China, established in 2014, is located in Changsha, Hunan Province. The company focuses on high-speed PCB design, printed circuit board manufacturing, SMT welding processing, and supply chain services. Products are widely used in communications equipment, computers and network equipment, consumer electronics, automotive electronics, industrial control, new energy, rail transportation, and other industries.

The transportation industry has come up with many effective innovations in providing electronic solutions that take advantage of complex, highly customized PCBs. For risk-free transportation solutions, the printed panel circuit board industry has developed mature PCB panel, PCB manufacturing boards, and SMT to meet technological advancements in road transportation, railway, aerospace, shipping, marine, and automotive markets.

Application of PCB in transportation:
GPS tracking devices show new innovations in their use, installing vehicles by transmitting vehicle batteries directly to a web server. Rigid flex PCB has a high utilization rate, and mini GPS trackers used in various transportation systems are increasingly used.

Reverse alarm for trucks, forklifts, electric vehicles, coaches, buses, tankers, and other heavy vehicles. Another type of alarm system includes a call alarm, which has a risk-free warning system that can account for the exact danger of not applying a manual brake, releasing the seat belt, requiring fuel, etc. Other car alarms and immobilizers used for vehicle security are also used to lock doors and steering wheels. For these automotive systems, anti-theft alarm circuits and automotive anti-theft circuits occupy a high percentage of the PCB market.

Automatic transformer track controllers are also demonstrating their innovations in railway systems controlling railway signal electronics. Detection devises for the train control mechanism. Today, rail traffic light controllers for train lighting systems and LED lights used on trains are running smoothly.

Automotive and heavy-duty vehicles are now equipped with system performance sensors, control brake systems, torque sensors, accelerometers, and other automotive parts sensors.

Dual-row PTH PCB, HDI layer PCB, and multi-layer PCB are used for train communication tracking and are highly used for communication systems in the railway industry.

Maglev trains without wheels with magnetic tracks will slowly replace traditional track systems as electronics develop.

Self-driving cars and electric vehicles with calibrated robots and navigation systems add the latest features

Intelligent road systems are used to understand traffic patterns, pay attention to tires hitting the ground, guide drivers to read traffic and route destinations.

Other innovations can be found in subways, subway trains, ships, submarines, speedboats, paraglider systems, ergonomic transport systems used in the medical industry, electric trucks, etc.

Today in the transportation industry, SPEEDAPCB guarantees to provide customers with high-end customized, high-quality PCBs, deliver orders on time, and manufacture and custom assembly PCB in accordance with international quality standards.

We alos custom rail pcb, din rail pcb and so on.

SSD PCB Design Case(2021年)

speedapcb — 2021-05-25T17:12:15+0900

https://www.speedapcb.com/ssd-pcb-design-case.html

Speedapcb - The Chinese pcb manufacturer in China, established in 2014, is located in Changsha, Hunan Province. The company focuses on high-speed PCB design, printed circuit board manufacturing, SMT welding processing, and supply chain services. Products are widely used in communications equipment, computers and network equipment, consumer electronics, automotive electronics, industrial control, new energy, rail transportation, and other industries.

[Single board type] SSD solid-state drive

[Pin number] 6213

[Layers] 8 layers

[Maximum rate] 8Gb/s

[Difficulties]:

1. 32 pieces of Nand-flash design, compatible with ONFI and Toggle two protocols;

2. The plate thickness is 1.0mm, the cost is high, and the cascading design is limited;

3. After the simulation, the signal reach to each chip needs the same length;

4. As the number of Nand-flash is relatively large, the heat generation is relatively large too, we need to consider the heat dissipation problem;

1. There is almost no wiring space at the top-bottom layer as the structural limited and the layout is tight; according to evaluation, it needs 2-3 inner layers at least for Nand's line, plus other miscellaneous wires and power supplies, the cascade needs to be designed as an 8-layer board and 3 inner layers. and the T-shaped structure is used for routing; the wiring topology and layout are as follows:

SSD PCB Design Case

2. Due to considering the customer's batching cost, the number of layers can not be too many, moreover, it should be strictly controlled both of the impedance and the same length on the Nand line and PCIE3.0 on the board. We need to communicate with the customer and SI at the early stage so that the number of layers, wiring equal length and impedance requirements can be satisfied at the same time; The actual design of the cascade is as follows (using an unconventional asymmetric cascade to meet the wiring. the power layer handles some local short signals to meet the reference ground plane):

SSD PCB Design Case

3.5/6 is the design of the adjacent layer, the wiring is staggered. Because the 5th layer processes the DQ signal, there is only a small part of the signal is processed in the 6th layer, the rest large area should be laid the power supply. and ground planes are used for reference reflow; most of the important signals need to be processed at the third level;

4. As the board is thin, in the circumstances of the inner layer does not affect the impedance of the adjacent layer traces, the GND copper is mostly irrigated in the spare place to avoid the board bending;

Security System PCB Manufacturer & Assembly(2021年)

speedapcb — 2021-05-25T17:11:48+0900

https://www.speedapcb.com/security-system-pcb.html

Speedapcb - The PCB supplier in China, established in 2014, is located in Changsha, Hunan Province. The company focuses on high-speed PCB design, printed circuit board manufacturing, SMT welding processing, and supply chain services. Products are widely used in communications equipment, computers and network equipment, consumer electronics, automotive electronics, industrial control, new energy, rail transportation, and other industries.

Security applications: Security systems within and outside the home, enterprise, including surveillance, burglar alarms, and access control, etc., use security PCB to coordinate various components and signals used to detect the presence of intruders. In addition, smoke or fire alarms, electronic door locks, and motion sensors all use security PCB.

The intrusion detector in the PCB is a front-end device in the intrusion alarm system. It consists of various detectors and is the tactile part of the intrusion alarm system. Security PCB is equivalent to human eyes, nose, ears, skin, etc., and senses the temperature, humidity, changes in various physical quantities such as odor and energy, and converts them into electrical signals suitable for transmission in accordance with certain rules.

SI/PI Simulation Analysis(2021年)

speedapcb — 2021-05-25T17:11:20+0900

https://www.speedapcb.com/pi-simulation-analysis.html

Speedapcb - The PCB design company in China, established in 2014, is located in Changsha, Hunan Province. The company focuses on high-speed PCB design, printed circuit board manufacturing, SMT welding processing, and supply chain services. Products are widely used in communications equipment, computers and network equipment, consumer electronics, automotive electronics, industrial control, new energy, rail transportation, and other industries.

electronic board simulator, circuit board simulator

Using the computer to realize the simulation research of the system is not only convenient and flexible but also economical. We offer PCB thermal analysis software free.

Evolution of PI Simulation
Therefore, computer simulation plays an important role in simulation technology.

In the early 1950s, the vast majority of simulation studies of continuous systems were conducted on analog computers.

In the mid-1950s, people began to use digital computers to realize digital simulation. Computer simulation technology then developed in two directions: analog computer simulation and digital computer simulation.

After adding logic control and analog storage functions to analog computer simulation, hybrid analog computer simulation and hybrid computer simulation combining hybrid analog computers and digital computers have emerged. In the process of developing simulation technology, a large number of simulation packages and simulation languages have been developed.

In the late 1970s, a dedicated all-digital parallel simulation computer was successfully developed.

(PI) Advantages of Simulation Design
1. Diversified products and rich engineering experience

2. Comparison of simulation and test to continuously improve simulation accuracy

3. Help solve power problems through simulation and accurate power test

The Advantages of Speedapcb PCB Simulation Analysis and Calculation
The PCB simulation analysis and calculation developed by SPEED Co., Ltd. have high precision; easy to use, easy to modify parameters; adopting program control, and a high degree of automation. The designer has rich experience and can customize the effect of PCB simulation software you want according to your requirements to provide you with satisfactory service and quality.

We provide pcb design simulation and pcb simulation tools include pcb thermal simulation open source, pcb thermal simulation, pcb thermal analysis, pcb simulation and so on,

PCB Layout(2021年)

speedapcb — 2021-05-25T17:10:54+0900

https://www.speedapcb.com/pcb-layout.html

Speedapcb - The Chinese pcb manufacturers in China, established in 2014, is located in Changsha, Hunan Province. The company focuses on high-speed PCB design, printed circuit board manufacturing, SMT welding processing, pcb layout design services and printed circuit board layout services. Products are widely used in communications equipment, computers and network equipment, consumer electronics, automotive electronics, industrial control, new energy, rail transportation, and other industries.

The technological process of PCB printed circuit board layout design includes design of schematic diagram, login database of electron component, preparations for design, block subdivision, configuration of electron component, confirmation of configuration, wiring, and the final inspection.

Rules of Metal Detector PCB Layout:
1. Under the general circumstances, all the electron components should be set on the same aspect of the circuit board. Only when the components on the top layer overcrowd, can we put the modules with limited height and small-volume of heat emission such as chip resistor, chip capacitor, chip IC, etc. on the lower layers.

2. Under the premise of ensuring electrical performance, the components should be placed on the grid and arranged parallel or perpendicular to each other to keep neat and beautiful. In general, the components are not allowed to overlap; the components should be arranged compactly, and the components should be evenly distributed on the entire layout with consistent density.

3. The shortest distance between different modules and the bonding pad on the circuit board should be over 1mm.

4. The distance to the edges of the circuit board shouldn’t be shorter than 2mm. The best shape of the circuit board is rectangular with the length-width ratio of 3:2 or 4:3. When the circuit board surface is larger than the size of 200mm*150mm, mechanical strength the circuit board can bear should be considered.

Normal Questions in PCB layout
1. How to arrange the PCB layout to reach the best heat emission effect?

Answer: there are three aspects of the heat source within PCB: (1) the heat emission of the electron component;(2) the heat emission of PCB itself;(3) the heat emission from other parts. Among these three heat sources, the heat emission from electron component is the most that it is the main heat source. And then the heat volume of PCB itself comes to the second, while the heat from external environment needs no consideration, since it depends on the overall heat design of the system. Therefore, the goal of heat design is to adapt proper measures and methods to lower the temperature of the electron components and the PCB so that the system can work normally under the proper temperature. It can be fulfilled mainly through reducing the heat emission volume and accelerating the heat emission.

2.How to reduce the electromagnetic interference in the PCB layout?

Answer: for reducing the electromagnetic interference, you need to be careful about matching, decoupling, layout and wiring, layering and other problems. It is reasonable to refer to some information.

3.For signals over 5G, what should be considered specially?

Answer: you should consider the transmission line effect, parasitic effect, and problems about EMI.

4.Should the distance between the thermosensitive element and heating element be considered?

Answer: the heating element should be set at the edge of the PCB in order to emit the heat. If the PCB is installed vertically, the heating element should be set right over the PCB. And the thermosensitive element should be away from the heating element.

5.What should I notice when setting the multilayer board layout?

Answer: when setting the multilayer board, you should notice that suspending ground plane or power layer must be avoided because the power and ground layers are in the interior layers. Besides, ensure that the through holes drilled on the ground absolutely connect the ground plane. In the final step, you need to add some test points for some important signals to facilitate the measurement in debugging.

6. How could I effectively reduce the interference among electrical modules, and how could I set the layout of amplifier to limit the introduction of the ripple at the maximum?

Answer: the principles of reducing interference are:

1.Reduce the radiation ends;

2.Enhance the isolation, shielding, and decoupling of being interfered;

The principles of reducing ripple are:

1.Reducing the ripple output of switching power supply;

2.Enough decoupling filtering;

We provide pcb layout projects,include hdi layout and hdi pcb layout, and the pcb layout price is very low.

Pcb for different led applications(2021年)

speedapcb — 2021-05-25T17:10:25+0900

https://www.speedapcb.com/pcb-for-different-led-applications.html

Led's advantages make LED printed circuit boards ideal for many applications and industries. Some of the more prominent applications of aluminum LED printed circuit boards include: telecommunications LED PCB, automotive LED PCB, computer LED PCB, medical LED PCB, LED PCB products: LED tube, outdoor LED advertising screen, LED light, waterproof LED and so on.

Although LEDs are useful in a variety of applications, LEDs are often sensitive to temperature. As the average temperature of the luminaire increases, the life of the LED bulb gradually decreases. Although many traditional PCBs provide excellent functionality, not all PCBs are suitable for LED applications. When paired with an LED, some PCBs may not transfer heat fast enough to provide a stable temperature environment for the LED to operate at maximum efficiency. In order to maximize performance in lighting applications, PCBs designed for LEDs must be designed to maximize heat transfer capabilities.

For this reason, the aluminum back PCB is the perfect solution. Most high lumen outputs LED applications to use an aluminum back PCB, which is mainly used for the higher level of heat transfer that an aluminum PCB can achieve. In this way, the PCB does not require an additional heat sink in the design, but other heat sinks can be added to further improve the PCB's heat transfer capability. However, incorporating a heat sink into the PCB base itself allows manufacturers and end-users to achieve more compact designs at a lower cost.

As an LED PCB manufacturer, SPEEDAPCB offers a variety of LED PCB products. Suitable for high power LED on an aluminum substrate, copper substrate, a ceramic substrate, FR4 PCB, low power LED for high-temperature PCB.

We also offer smd led pcb design service, solar inverter pcb, smd led circuit board, solar pcb board, pcb board for led bulb and solar light pcb.

PCB Fabrication Service(2021年)

speedapcb — 2021-05-25T17:10:00+0900

https://www.speedapcb.com/pcb-fabrication-service.html

The production process of PCB is relatively complex, and it involves a wide range of processes, from simple mechanical processing to complex mechanical processing. There are common chemical reactions and photochemical electrochemical thermochemical processes, computer-aided design CAM, and other aspects of knowledge. Speeda circuit manufacturing company offers cheap printed circuit fabrication, pc board fabrication, pcb bare board manufacturing and circuit board making machine.And the pcb manufacturing price is very low.

Introduction to SPEEDAPCB Fabrication Service
Who are we?

SPEEDAPCB products are widely used in industrial control, communications, new energy, automotive, medical equipment, security, aerospace, and other fields.

The PCB factories are located in Guangdong Province and Jiangxi Province.

Provide 2-64 layer sample and batch PCB production services

Ordinary board / M4 / M6 / Roger / TU872 and other prototype pc boards

Ordinary board / HDI board / FPC / rigid-flex board / metal substrate

ISO9001, ISO14001, UL certification

Our advantage

Born in technology, we understand R & D needs

Perfect integration of design and production

Reliable quality

Fast delivery and timely delivery

Why choose us?

PCB production services that meet R & D needs

Anxious for your urgency, fast delivery

Multilayer PCB fabrication service

PCB Fabrication Service Details

Layers2-64L
Plate Thickness0.6-10mm
Minimum mechanical aperture0.2mm
Minimum laser aperture4mil
HDI Type1+n+1、2+n+2、3+n+3
Minimum line width & spacing4/4mil
Impedance control+/-10%
Maximum copper thickness6oz
Maximum plate thickness ratio16:01
Maximum board size610mm X 1100mm
BoardFR4/Hi-Tg/Rogers/Halogen Free/RCC/PTFE/Nelco/Mixed material
Special processingBuried blind holes, stepped grooves, metal substrates, embedded resistors, buried capacitors, mixed pressure, soft and hard bonding, back drilling, stepped gold fingers, etc.

LayersNormalExpedited
Double-Sided6 days48 hours
4 Layers8 days3 days
6 Layers10 days3 days
8 Layers10 days4 days
10 Layers12 days4 days
12 Layers12 days5 days
14 Layers14 days6 days
16 Layers16 days6 days
18 Layers18 days6 days
20 Layers18 days10 days
22 Layers20 days10 days
24 Layers20 days10 days
26 Layers20 days10 days

PCB Design Service(2021年)

speedapcb — 2021-05-25T17:09:31+0900

https://www.speedapcb.com/pcb-design-service/

In the PCB layout, designers will consider different situations and use different design tools. The main factors to consider are:

User interface (UI)

Price

Features

Large component library

Introduction of PCB Design
The printed circuit board design and manufacturing is based on the circuit schematic diagram to realize the functions required by the circuit designer. The online PCB design mainly refers to layout design, which needs to consider various factors such as the layout of external connections, the optimal layout of internal electronic components, the optimal layout of metal wiring and through holes, electromagnetic protection, heat dissipation, and so on. Excellent layout design can save production costs and achieve good circuit performance and heat dissipation performance. Simple layout design can be implemented manually, and complex layout design needs to be implemented with the aid of computer-aided design (CAD).

An automated software program establishes a convenient method in PCB design that can be easily converted to a physical PCB. Listed below are some popular design tools such as Altium Designer, Eagle, and OrCAD.

Commonly Used PCB Design Software
Altium Designer is more commonly used in China. This software is relatively simple and the design is more casual. It is not very good to use this software for complex PCBs.

Cadence SPB, the ORCAD schematic design is an international standard; PCB design and simulation are very complete, which is more complicated to use than protel, mainly because the requirements and settings are complicated; Protel is obviously powerful.

Mentor. The current MentorEE version is Mentor EE 7.9. It belongs to the same level of PCB design software as Cadence SPB. It is inferior to cadence SPB in some places. Its strengths are pulling wire and flying wire. It is called a flying wire king.

EAGLE Layout This is the most widely used PCB design software in Europe.

The PCB online design software mentioned above is used a lot, and Cadence SPB and MentorEE are well-deserved kings.

Zuken's CADSTAR PCB design software provides a complete design environment. CADSTAR provides design capabilities throughout the PCB design process, from schematic to layout, routing, signal integrity simulation, power integrity analysis, and 3D mechanical integration.

SPEEDAPCB Company Advantage
SPEEDAPCB's senior designers with rich design experience will provide one-to-one pcb design and prototyping service for you, we can handle many different kinds of PCB circuit board design service design, including high-frequency PCB design. And we will strive to satisfy customers. Reduce the number of R & D and the costs for you.
Design delivery period and capability

QuantityDelivery Time(working day)
0-1000PIN1-3 days
1000-3000PIN3-5 days
3000-5000PIN5-7 days
5000-8000PIN7-10 days
8000-10000PIN10-13 days
10000-20000PIN13-20 days

The highest layer of HDI20 layers
Highest level HDIHDI any level of 24
The highest layer of design52 layers
Min line width2.5mil
Min line spacing2.5mil
Min hole size6mil（4mil laser drilling）
Min BGA spacing0.35mm
Max BGA-PIN3600PIN
Highest speed signal28GBPS

What Is Printed Circuit Board Assembly?(2020年10月16日)

speedapcb — 2020-10-15T15:20:34+0900

https://www.speedapcb.com/pcb-components-procurement-service.html

Printed circuit board assembly is the process of connecting electronic components to the wiring of the printed circuit board. The traces or conductive paths engraved on the laminated copper board of the PCB are used in non-conductive substrates to form components.

What is the difference between PCB and PCBA
PCB or printed circuit board is the traditional name for the bare board. You can provide layout data to the bare board and use it to install these components after we deliver the bare board to you.

Printed circuit boards (PCBs) are used to mechanically support and electrically connect electronic components through conductive paths, traces or signal traces etched from copper sheets laminated to non-conductive substrates.

PCBA (Printed Circuit Board Assembly) is a board where all components and parts are soldered and mounted on the PCB, and the electronic functions of its design can now be completed.

Circuit Board Assembly Services
It must be noted that the assembly of the circuit board is different from the PCB manufacturing process. The printed circuit board (PCB) assembly process includes multiple steps, including PCB design and the creation of a PCB prototype. These steps must be performed in the correct order so that the final product can work as designed. To ensure that this happens, printed circuit board assembly companies use screen templates and controlled heating and cooling mechanisms to adjust how components are applied and where they are fixed. After preparing the PCB, you need to solder active and passive electronic components to it before you can use it in any electronic device or gadget.

When assembling printed circuit boards, the correct technology must be selected for the type of common circuit board components at hand. All parts must be correctly aligned according to the positions specified in the PCB design. The assembly of electronic components depends on the type of printed circuit board, the type of electronic component, and the purpose of the circuit board. Any slight deviation will have a huge impact on the function of the finished board.

Speeda PCB provides high-quality printed circuit board assembly services. The products we provide have a large price advantage in the

How Printed Circuit Board Is Made？(2020年10月15日)

speedapcb — 2020-10-15T15:20:05+0900

https://www.speedapcb.com/pcb-fabrication-service.html

The PCB manufacturing process is very important to anyone in the electronics industry. Printed circuit boards (PCBs) are widely used as the basis of electronic circuits. Printed circuit boards are used to provide a mechanical foundation that can be used to build circuits.

The PCB board manufacturing process can be implemented in many ways, and there are many variations. Although the changes are small, the main stages of the PCB manufacturing process are the same.