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Standard Flex Materials:
| Base Copper: | 1/3 oz. - .00047 in. (.012mm)--rarely used |
| 1/2 oz. - .0007 in. (.018mm) | |
| 1 oz. - .0014 in. (.036mm) | |
| 2 oz. - .0028 in. (.071mm) | |
| Solder Mask: | Polyimide Coverlay: 0.5 mil to 5 mils Kapton (.012mm - .127mm) |
| with 0.5 to 2 mil Adhesive (.012mm - .051mm) | |
| LPI and LDI Flexible Soldermasks |
Specification of FPC Manufacturing
| Material | FR4,Polyimide / Polyester |
| Counts | Flex: 1~8L; Rigid-Flex: 2~8L |
| Board Thickness | Min.0.05mm ; Max. 0.3mm |
| Copper Thickness | 1/3 oz-2 oz |
| Holes Location Tolerance | ±0.05mm |
| Coverlay Drill Size (Min) | 0.6mm |
| CNC Drill Size (Max) | 6.5mm |
| CNC Drill Size (Min) | Flex: 0.15mm |
| Min Line Width / Spacing | 0.1/0.1mm |
| Min Pad Size | φ0.2mm |
| Etch Tolerance | Finished line width tolerance ±20% |
| Hole to Coverlay Opening Windows (Min) | 0.15mm |
| Surface Finish | Plating Ni / Au ; Chemical Ni / Au ; OSP; Immersion Silver/Gold, OSP, Gold plating |
| Coverlay Registration Tolerance | ±0.15mm |
| Solder Mask Registration Tolerance | ±0.2mm |
| Min. Solder Mask Dam | 0.1mm |
| Stiffener, Adhesive, Glue paper | ±0.30mm |
