Flexible printed circuit (FPC) membrane switches are electronic components that integrate flexible printed circuits with membrane keypad technology. Their structure typically comprises a polyester (PET) or polycarbonate (PC) substrate, conductive silver paste circuits, an insulating layer, and a surface cover layer. Circuits are formed on the film via printing or etching processes; pressing the switch causes the upper and lower circuits to contact, enabling signal conduction, which automatically resets upon release.
Compared to conventional mechanical switches, FPC membrane switches can be manufactured to a thickness of less than 0.3mm, achieving weight reductions exceeding 60%. Furthermore, they support curved surface bonding designs, enabling the miniaturisation of electronic devices.
Excellent tactile feedback: The elastic deformation of dome switches provides clear tactile feedback to the operator, delivering a comfortable keystroke feel.
Extended Lifespan: The tactile switch's operational lifespan exceeds one million actuations, surpassing the longevity of conventional silicone buttons.
High Flexibility: The bendable nature of the flexible printed circuit (FPC) enables the switch to adapt to devices with varied shapes and spatial constraints, facilitating design and installation.
Superior Stability: Utilising FPC as the circuit layer delivers enhanced electrical performance and environmental resilience compared to traditional silver paste circuits, exhibiting reduced susceptibility to factors such as temperature and humidity.
Consumer Electronics Sector
Flexible printed circuit (FPC) membrane switches are extensively utilised in smartphone side buttons, wireless earbud charging case switches, and laptop touchpads. Their ultra-thin profile enables more refined device designs while achieving waterproof ratings up to IPX7.
Medical Equipment Sector
In portable ultrasound devices and electronic thermometers, FPC membrane switches' antimicrobial coatings and sealed structures meet medical-grade cleanliness requirements, mitigating cross-infection risks.
Industrial Control Applications
When integrated into human-machine interfaces (HMIs) for automated equipment, FPC membrane switches enhance vibration resistance by threefold and reduce misoperation rates to below 0.1%, ensuring stable production line operation.
1. Environmental Suitability: Choose substrate material based on operating temperature and humidity
2. Tactile Requirements: Metal springs provide crisp feedback, while conductive rubber suits silent applications
3. Lifespan Demands: Gold-plated contacts are essential for high-frequency usage scenarios
4. Customisation Level: Laser etching is required for intricate patterns
