Custom Membrane Switches
Custom Membrane Switches & Keypads Built to Perform
CSI Keyboards designs and manufactures custom membrane switches and keypads engineered for precision, durability, and dependable performance. From tactile and backlit keypads to sealed control interfaces, we create solutions tailored to your application’s unique requirements.
Our capabilities include custom graphic overlays, flexible circuitry, metal dome technology, advanced backlighting, and fully integrated HMI assemblies.
Your Design. Our Expertise.
How Membrane Switches Work
A membrane switch is a thin, customizable interface that controls equipment at the press of a button. It consists of multiple layers, including a graphic overlay, adhesive layers, and circuitry. When pressed, the switch completes a circuit and sends a signal to the device.
CSI Keyboards designs and manufactures custom membrane switches for a wide range of applications. Options include tactile feedback, LED backlighting, environmental sealing, and integrated electronics—all tailored to your product’s requirements.
Custom Membrane Switch Construction & Design Options
CSI Keyboards offers a wide range of materials, circuitry, tactile features, and protective options to meet the functional and environmental requirements of your application.
Graphic Overlays & Materials
Custom polyester and polycarbonate overlays with durable printing, finishes, and embossed features.
Tactile Feedback & Embossing
Metal dome switches and pillow, perimeter, or Braille embossing for improved operator feedback.
Environmental Sealing
Protective construction options designed to resist moisture, dust, and contaminants.
Circuitry & Connections
Flexible copper and printed silver circuitry with custom tails and connector configurations.
Custom Backlighting
LED, light guide film, fiber optic, and electroluminescent lighting options for illuminated controls.
EMI, RFI & ESD Protection
Shielding options to help manage electromagnetic interference and electrostatic discharge.
Additional Membrane Switch Options
Customize your membrane switch with features selected for your product and operating environment:
- Display windows: Clear or smoked windows and dead-front designs
- Switch feel: Tactile or non-tactile operation
- Display integration: Displays and touchscreens incorporated into the assembly
- Key finishes: Epoxy or UV coatings and selective texturing
- Graphics: Custom printing, colors, and surface finishes
- Material selection: Chemical- and UV-resistant options
- Support backers: Metal or G10 for added rigidity and mounting
Membrane Switch Backlighting
CSI Keyboards offers custom backlighting solutions that improve visibility, functionality, and appearance in low-light environments. Our options include LED, light guide film (LGF), electroluminescent (EL), and fiber optic backlighting, all tailored to provide consistent illumination and enhance the user experience.
LEDs
Efficient, customizable lighting for individual keys, symbols, and indicators, with options for brightness and color.
Light Guide Film
A thin optical film distributes LED light across multiple keys, providing even illumination in a compact design.
EL Backlighting
A thin, flexible illuminated panel provides even backlighting for keys, symbols, and larger graphic areas.
Fiber Optics
Flexible optical fibers carry light across an interface, providing backlighting for keys, symbols, or larger areas.
Membrane Switch Environmental Sealing
CSI Keyboards designs and manufactures custom membrane switches engineered to withstand demanding environmental conditions. Our sealing solutions help protect sensitive circuitry from moisture, dust, chemicals, UV exposure, and temperature extremes.
Through durable overlay materials, copper flex circuitry, perimeter sealing, and specialized adhesives, we create reliable membrane switch assemblies tailored to each application’s environmental and performance requirements.
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Copper Flex Membrane Switches
Built with etched copper circuitry on flexible polyimide (Kapton®) substrates, offering excellent durability, flexibility, thermal stability, and chemical resistance. Ideal for demanding applications where reliable electrical performance is essential. -
Seal Frame
A perimeter adhesive seal designed to protect membrane switch circuitry from moisture and environmental contaminants, helping improve long-term reliability. -
Environmentally Resistant Adhesives
Specialized adhesives provide strong bonding and resistance to moisture, UV exposure, temperature changes, and chemicals. -
Protective Coatings & Surface Finishes
UV and chemical resistant surface finishes to help improve resistance to abrasion, chemicals, environmental exposure, and everyday wear.
