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http://www.eolanescm.com/multilayer-pcb.html
Eolane SCM is recognized as a leading multilayer pcb supplier, specializing in the following market segments:
•PCB Prototypes
•Short Runs
•Medium Runs
•Long Runs

Value added services, superior product quality, on-time delivery, and total customer satisfaction are our core priorities.

Multilayer pcb board Capabilities
•Max Number of multilayer PCB Layers: Up to 36 Layers
•Max Circuit Board Size: 21"x 24" (533.4 x 609.6) (Special Size ,Pls contact us ,Led length up to 1500mm)
•Min Trace/Space: 3 mil (0.0762mm)
•Min Mechanical Drill Size: 8mil (0.20mm)
•Min Laser Drill Size: 3 mil (0.0762mm)
•Max Inner Copper: 5oz
•Max Outer Copper: 11 oz
•Controlled Impedance +/-7%
•Blind / Buried Vias
•Material: FR4, FR4 High Tg, Aluminum, Rogers, Arlon, etc.
•Surface: Lead Solder (HASL), Lead Free Solder(HASL – LF), ENIG, Immersion Silver, Immersion Tin, OSP, Hard Gold, Flash Gold, etc.
•RoHS Compliant
•Class II & Class III
•UL certified
•ISO 9001
•Free E-test on Every Board

Multilayer Rigid PCB Specification
Number of layers4L-36L
MaterialsStandard FR4，Hig TG FR4,Halogen-Free FR4,High Speed FR4,High Frequency FR4.
PCB thickness0.38mm-5mm
Minimum track width/Space0.075mm/0.075mm
Cu thickness (finished)1oz to 5oz
Maximum Panel size850mmX570mm
Surface treatmentHASL, ENIG, Immersion Tin, OSP, Immersion Silver, Hard Gold/Soft Gold, Gold Finger,ENEPIG.
Minimum Drill size(Mechanical)0.15mm

If you are looking for cheap flexible pcb, please contact us.