Flexible PCB with key pads and membranes are widely seen in many applications-old school cell phones, control panels, TV remote controllers, car dashboards, and so on.
A typical structure of key pads FPCB is a flexible printed circuit board, double sided adhesive, plastic spacers, metal or plastic domes, and a color printed membrane or a color key pad.
- CMI Corporation supplies high quality flexible PCB with key pads and membranesthat always satisfy our customers goals-
Up to 4 layers flexible PCB
RoHS conform
Custom colors with pan tone check
integrate with touch panels, housing, and firmware
Connector assembly
Dome & membrane key pad assembly
- Flexible Printed Circuit Board Manufacturing Capability
Board Type | Single-Sided | Double-Sided | 3 Layers / 4 Layers |
Max Size | 230x440mm | 230x440mm | TBD |
Base Film Material | PET-3mil, PI-0.5mil/1mil/2mil | PI-0.5mil/1mil/2mil | PI-0.5mil/1mil/2mil |
Cu Thickness | 0.3oz/0.5oz/1oz | 0.3oz/0.5oz/1oz | 0.3oz/0.5oz/1oz |
Coverlay | PET-1mil, PI-0.5mil/1mil/2mil | PI-0.5mil/1mil/2mil | PI-0.5mil/1mil/2mil |
Solder mask | LPI | LPI | LPI |
Min Line width | 4mil (partial 3mil) | 4mil (partial 3mil) | 5mil (partial 4mil) |
Min Line Interval | 4mil (partial 3mil) | 4mil (partial 3mil) | 5mil (partial 4mil) |
Min Hole Diameter | 8mil(Finished) | 8mil(Finished) | 10mil(Finished) |
Min Pad Size | 20mil | 20mil | TBD |
Min SMD Pitch | 20mil | 20mil | 20mil |
Surface treatment | Plated/Immersion Tin, Electro/Electroless(immersion)gold plating,ENTEK (OSP) | ||
Stiffener Type | PET, PI, FR4 | ||
Adhesive | 3M 467-MP, 3M 9460 |