FPC membrane switch in healthy industry

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FPC Membrane Switch
FPC Membrane Switch
FPC Membrane Switch
FPC Membrane Switch
FPC Membrane Switch

FPC membrane switch in healthy industry

FPC membrane switches find extensive applications in analytical instruments, serving as integrated components that enhance user interaction and device control.

  • Panel material:PVC, PC, PET

  • Rebound time:<=6ms

  • Loop resistance:≤ 80Ω (within 40cm of a single key return route)

  • Insulation resistance:>=100VDC

  • Trip force:160~450g

Basic Parameters of Tactile Membrane Switch
Max. Panel size 600*800mm
Max. Panel size    (with emboss) 400*500mm
Paste silver paste, carbon paste
Ink color red, black, blue, white, yellow, green, purple, etc
Trace width 0.15-0.20mm
LED spec. 0402, 0603, 0805, 1210
Wire length Per customer requirements
Waterproof class IP65
Connector female pin, male pin
Metal dome types triangle, for-legs, circle
Trip force (metal dome) 280g, 340g, 450g
Travel (metal dome) 0.35-0.71
Diameter (metal dome) 8.4mm, 10mm, 12.2mm
Surface treatment  (metal dome) gold plating, nickle plating, stainless
Back adhesive DSMS, 3M, SOKEN
Citcuit board option FPC, PCB, Aluminum
Panel material PET, PC, TPU, PMMA
Uses of FPC Membrane Switch:

Tactile membrane switches provide feedback when activated by a finger or actuator. This tactile response improves user experience in situations where alternative feedback methods are limited, or confirming the switch activation is critical.

Manufacturing Process:

FPC membrane switch panels can be produced using polyester or polyimide (e.g., Kapton) as the base material, depending on specific interface requirements. The production involves laminating a thin copper sheet onto the flexible film substrate. A chemical etching process then removes excess copper, leaving behind the desired copper traces forming the circuit.

Benefits of FPC Membrane Keypads:

Compared to PET membrane switch panels, FPC is more expensive, primarily due to the substantial use of copper foil and, in some cases, gold (surface treatment). Although copper and gold prices are expected to rise, the higher cost of FPC is justified by its stability and reliability. FPC allows for concentrated dense lines on a small copper flex circuit. The use of double panels and multipanels enables installing more components in a smaller area, resulting in smaller product dimensions—an advantage unmatched by PET circuits. FPC also offers benefits in electrical properties, with lower resistance due to the absence of bridging and throughhole printing. The ZIF tail of the FPC line can achieve a spacing as small as 0.05 mm, allowing intricate and compact designs.

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