Surface Finish: Special processes such as Immersion Gold, Immersion Tin, Immersion Silver, OSP, etc.

Materials: (DuPont, Shengyi, Taihong) PI, PET;
Auxiliary Materials and Reinforcement: Generally classified into 4 types: FR4, PI, Steel sheet, FPVC, 3M, adhesive paper, shielding film, etc.; commonly used are FR4 and PI for reinforcement.

Finished Thickness: 0.05-0.3mm (for pure 1-2 layer flexible boards, and reinforced boards)

Minimum Trace Spacing: 2.5mil/0.05 (Ni/AU board), 3mil/0.075mm

Technical Parameters: Copper thickness ranging from 1/30Z to 20Z; BGA resin, copper-plugged blind vias, impedance control

Tooling Required for Mass Production: Tooling for outer shape, packaging, reinforcement, etc.

Minimum Hole Size: 0.15mm

Maximum Processing Size: 1200*250mm