FPC spec: 1. Min. trace width : 0.075mm 2. Min. space between trace: 0.075mm 3. Min. hole size: 0.25mm 4. Min thickness: a) Single sided: 0.07mm b) Double sided: 0.13mm 5. Dimension tolerance: a)+/-0.05mm (Metal tooling) b)+/-0.10mm (Cutting tooling) 6. Base materials: PI, PET 7. Conductor (copper thickness): 0.5oz., 10oz. and 20oz. (RA and ED copper) 8. Cover-layer: PI and PET (solder mask printing is available) 9. Adhesive material: Epoxy, Acrylic and Polyester 10. Stiffener materials: FR-4, Mylar and Polyimide 11. Surface finishes: flash gold plating, selective gold plating and solder plating Sinodel Electronic Holding Ltd is a leading switching manufacturer of China, specialized in production of high quality membrane switch / keypad, nameplate, graphic overlay, FPC, touch screen and EL backlight.