FPCB Flex PCB with Key Pads Membranes

Flexible PCB with key pads/membranes

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-

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