Membrane Circuit Switch

Membrane Circuit Switchs can be developed using polyester or polyimide as the base material, depending on your interface requirements. From simple single layer copper flex on polyester to complex double-sided on polyimide, rapidly provides customers with application-specific solutions.

Membrane Switches Operating Principle

• Static State: Upper and lower circuit layers are separated by an insulating layer, with the circuit in an open state and no signal transmission occurring.

• Pressure Activation: Upon pressing the panel (or directly pressing the circuit area), the upper layer deforms with the substrate, passing through the insulating layer's through-holes to contact the lower layer. This forms a conductive loop, transmitting control signals to the device's main control system.

• Reset Disconnection: Upon release, the substrate rebounds via its inherent elasticity, separating the upper and lower circuits. The circuit disconnects, terminating signal transmission.

Trace Width

Standard line width-0.25mm, minimum 0.10mm

Standard trace pitch-0.50mm, minimum 0.20mm

Minimum space between-circuits 0.10mm

Base Material

• Polyimide: standard thickness-1mil 2mil and 1/2 mil available

• Polyester: standard thickness-3mil 1mil, 2mil and 5mil available

• Conductor: laminated ED copper or RA copper-standard thickness 1 oz (1.4mil/0.035mm) 1/2 oz and 2 oz available

• Coverlay: polyimide, polyester or solder mask thickness-1/2 mil, 1mil, 2mil, 3mil or 5mi

Line Membrane Switchs offer numerous significant advantages: waterproof, dustproof, oil-resistant, and resistant to corrosion by harmful gases, with stable and reliable performance; they are also lightweight, compact, long-lasting, and easy to install. Notably, their panels are washable without damaging the characters, and they feature vibrant colors, making them both aesthetically pleasing and elegant. 

Line Film Switch Application Areas

• Industrial Control: CNC machine tools, PLC controllers, measuring instruments, frequency converters, etc., for control functions such as equipment start-up, parameter setting, and status switching;

• Electronic Communications: Mobile phones, tablets, smartwatches, routers, etc., serving as touch-sensitive buttons or functional control circuit carriers;

• Medical Equipment: Patient monitors, infusion pumps, diagnostic devices, etc., requiring high sealing integrity and resistance to disinfectant corrosion, where circuit stability directly impacts equipment precision;

• Domestic Appliances: Washing machines, microwave ovens, air conditioners, smart toilets, etc., adapted for humid environments to enable function switching and operational control;

• Automotive Electronics: In-vehicle control panels, window controls, air conditioning buttons, etc., withstanding extreme temperatures and vibration to ensure reliable operation during driving.