Details of Flex & Rigid Membrane Switches
The circuit of membrane switches can be flex and rigid. It depends
on the customer end application and also related to the cost budget
and other considerations. For example, life, resistance, connection
type on the mainboard, etc.
For the flex circuit membrane switches, there are two types. They
are silver printed PET circuit and copper etched FPC circuit. Their
difference and advantages & disadvantages listed bellow:
|Items||Silver Printed Circuit||Copper Etched FPC Circuit|
|Contact Fingers||Silver and Carbon||Gold plated|
|Contact Buttons Pads||Silver||Gold plated|
|Life & Reliability||normal||good|
|Lead Time||2-3 days||7-10 days|
|Pitch||0.5mm (not suggested), 1.0mm, 1.27mm, 2.54mm||0.5mm, 1.0mm, 1.27mm, 2.54mm|
Usually if the membrane switches need assembled many LEDs, then we
suggest to use FPC circuit, it can get more stable LED soldering
quality. For the normal application the PET circuit is enough,
which is more economical. In addition if the conductor pitch is
0.5mm, although we also can print it, but we still suggest to use
FPC circuit. Because of that 0.5mm pitch is too small and it is
easy to occur the short circuit problem.
For the Rigid circuit membrane switches, the circuit is rigid
printed circuit board. The material of rigid PCB is usually FR4 and
Copper. By this type of membrane switch, the connector usually is
the SMD connector(sometimes also can be straight through
connector). For some application which need very stiff capability,
then use PCB circuit membrane switch.
Hotbar Lamination (Heatseal Lamination) of FFC and FPC Tail to
PET/ITO/PCB/FPC Circuit Layer:
Sometimes the customer need use the separate FPC or FFC tail
connected to the membrane switch PET or PCB or FPC circuit layer,
and for the capacitive membrane switches also have such kind of
application, then the hotbar lamination (or called pluse hot press
lamination, or heatseal lamination) becomes necessary in these
application fields. LUPHITOUCH is a professional manufacturer with
such kind of lamination capability. We have such kind of assembly
machine. We can hotseal the FFC/FPC tail to PET or FPC or PCB
circuit of our manufactured membrane switches.
For more information on PCB/FPC Membrane Switches, contact us
If you want to know more about our PCB/FPC membrane switches
services, please feel free to contact us.