Welcome to Luen Fung Silicone Rubber Mfg., Co
Membrane Switch Circuit Solutions
PRODUCT PARAMETERS
Description
At Luen Fung Silicone Rubber Mfg., Co, we specialise in designing and manufacturing high-performance membrane switch circuits tailored to your specific interface and control panel needs. With over two decades of engineering excellence, we deliver flexible, reliable, and compact solutions trusted by global OEMs across industries.
What is a Membrane Switch Circuit?
A membrane switch circuit is a low-profile electrical switch used to turn circuits on or off. It’s made from flexible materials, allowing it to be thin, durable, and lightweight—ideal for electronic interfaces like control panels, medical devices, appliances, and more.
These circuits are printed using conductive inks (such as silver or carbon) on flexible substrates like PET (Polyester) or FPC (Flexible Printed Circuit), depending on your application requirements.
Key Features
Tactile Feedback: Metal domes or embossed keys provide a satisfying click.
Compact and Slim: Offers a low-profile design perfect for space-constrained applications.
Flexible Layout: Can include multiple buttons, LEDs, domes, and graphic overlays.
Custom Design: Tailored to your needs in terms of size, shape, and functionality.
Enhanced Durability: Water-resistant, dust proof, and long-lasting.
Types of Membrane Circuit
We offer several membrane circuit solutions, including:
Silver Flex Circuit
Printed on polyester using silver conductive ink, this is the most cost-effective and flexible solution. It’s ideal for common interface applications with moderate complexity.
PCB-Based Membrane Circuit
Combines a membrane switch with a rigid PCB (printed circuit board), allowing for LED indicators, tactile domes, and even microcontrollers. Ideal for more complex or high-durability projects.
Flexible Printed Circuit (FPC)
Designed using copper circuits on polyimide substrates, FPCs offer high durability, excellent foldability, and are suitable for advanced, compact electronic products.
Typical Materials
- Top Layer: Graphic overlay made from PET or PC with custom printing.
- Spacer: Keeps circuit layers apart until a button is pressed.
- Circuit Layer: Printed with silver, carbon ink, or copper on PET or polyimide (for FPC).
- Back Adhesive: 3M adhesive or similar for mounting the switch onto your product.
Applications
Our membrane circuits are widely used in:
- Medical devices
- Home appliances
- Industrial equipment
- Automotive dashboards
- Consumer electronics
- Telecom systems
Each application benefits from a compact footprint, ease of integration, and long lifecycle.
Specifications of Membrane Switches Circuit
| Electrical Properties |
| Contact Resistance: 10-500 ohm Operating Voltage: <35 Voltes DC Operating Current: <100 mA Contact Resistance: <100 ohm Open Circuit Resistance: <10M ohm Contact Bounce: 5 to 30m sec Breakdown Voltage to Ground: 1000 Volts DC |
| Environmental Properties |
| Operating Temperature: -30℃ to 80℃ Storage Temperature: -40℃ to 80℃ Operating Humidity: Up to 95% |
*The information & specification are for reference only
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