PCB specification is as below
PCB Layer count: 4 layers
PCB Material: FR-4 Tg 135
PCB thickness: 1.6+/-0.2mm
PCB Surface Technique: Immersion gold+gold fingers: 30u"
PCB Finished copper thickness: 1 oz for all layers
PCB Minimum hole size: 0.1mm with laser drill
PCB Minimum track width/spacing: 0.1mm/0.1mm
PCB Solder Mask Color: Light Green
PCB Specialty: Gold fingers and impedance
PCB Industry machine PCB

Remark: All PCBs from TP conform to international standards in accordance with MIL, IPC, UL and RoHS. We also conform to the quality standard as ISO 9000 and ISO14000 by DNV
Specification: IPC class 2