Blue Copper Solder Multilayer Rigid-Flex Circuit Boards Electronic Manufacture PCB. Wide Material Selection: Supports FR-4, CEM-1/CEM-3, PI, High Tg, Rogers, PTEF, Alu/Cu Base, etc. Customizable Surface Finish: Options include ENIG, OSP, HASL, Chem Tin/Sn, and Flash Gold. Flexible Board Thickness: Available thickness ranges from 0.1mm to 8.0mm for various applications. High Layer Capacity: Supports multilayer boards from 1 to 32 layers with precise control. Fast Turnaround Service: Standard lead time as fast as 24 hours for 2-layer boards. Comprehensive Certifications: Certified with UL, ISO 9001, ISO14001, and IATF16949 standards. Customizable Solder Mask: Available in Green, Yellow, Black, White, Red, and Blue colors. Precision Manufacturing: Min line width/space of 3mil (0.075mm) with tight tolerances.