Technology area
Structure of FPCB

| ITEM | SPEC |
|---|---|
| Layers | 3~8 |
| Base Material | Polyimide or Polyester |
| Cover-lay | Polyimide or Polyester or Solder Mask |
| Thickness | 0.2mm~0.8mm |
| Line Width/Space | Normal Min, 0.07/0.07mm, Special Min. 0.06/0.06mm |
| Conductor | 1/3oz, 1/2oz, 1oz, ED or RA Copper |
| Surface finish | Electroless nikel immersion Gold, Direct Gold,soft gold, Hard Gold |
| Stiffener | Polyimide, Glass epoxy, Steel use stainless |
| Double coated tape | Coated Tape 3M 467 , 966 ,Sony D3410 , T4100 etc |
| Min. through hole diameter | Bit Drill Via Normal Min. 0.02mm Special Min. 0.150mm |
| Hole diameter tolerance | 10% |
| Solder resist | Photo Solder Resist, Polyimide flim |