Description: Prototyping and production of smart ring FPC circuit boards, customized manufacturing of flexible PCBs for smart rings, and a professional manufacturer of 4-layer FPC boards for smart wearable devices.
| Layer | 4L | Material Thickness | 0.25mm |
|---|---|---|---|
| Surface Finishing | ENIG 2u" | Finished Copper Thickness | 2oz |
| Solder Mask | Matte Black | Legend Mark | White |
| Material | PI | Minimum hole diameter: | 0.1mm |