Your Custom Membrane Switch Manufacturer
Delivering Reliable, High-Performance Solutions
Technomark, Inc. is a leading U.S. membrane switch manufacturer that creates membrane switch design solutions engineered for medical, aerospace, government, architectural lighting, and automotive applications. Our membrane switch solutions combine graphic overlays, printed circuits, tactile domes, and integrated backlighting into a durable, low-profile human interface. Designed for reliability and manufactured under ISO 9001:2015 standards, our switches deliver consistent performance in demanding environments.
Look what a well-designed membrane switch can do:
- Give your product an attractive face that portrays your corporate identity.
- Group keys and displays into an intuitive, organized user interface.
- Eliminate time-consuming wiring of discrete switches.
- Seal openings around displays or touchscreens.
- Create a smooth, easy to clean front panel.
- View our capabilities brochure
- And more. What are your objectives?
What is a Membrane Switch & How is it Constructed?
A membrane switch is a low-profile, flexible electrical switch used to control electronic devices. It serves as the human-machine interface (HMI), allowing users to communicate with equipment through tactile or non-tactile key presses. A familiar example is the control panel on a microwave which is the smooth front surface with printed buttons that activates specific functions.
Unlike mechanical switches with individual moving parts, membrane switches are built as layered assemblies that combine graphic design, circuitry, and tactile response into a sealed, durable interface.
Membrane Switch Construction
A custom membrane switch consists of multiple laminated layers engineered to function as a single integrated unit. A typical construction includes:
- Graphic Overlay – The top layer displaying branding, icons, and key legends. Often made of polyester or polycarbonate for durability.
- Adhesive Spacer – Creates separation between layers and allows key actuation.
- Printed Circuit Layer – Conductive traces (silver, carbon, or copper) that register electrical contact when pressed.
- Rear Adhesive – Secures the switch to the product enclosure.
- Tail & Connector Interface – Connects the switch to the device’s PCB or control electronics.
Custom Membrane Switch Design
Construction varies based on environmental conditions, electrical requirements, and product complexity.
For applications requiring enhanced durability, shielding, or higher current capacity, copper/polyimide flex circuits, often referred to as Kapton® circuits, can replace standard printed silver circuitry. These designs offer:
- Improved moisture resistance
- Greater current-carrying capability
- Enhanced environmental stability
Additional options such as EMI/RFI shielding, ESD protection, backlighting integration, and sealed perimeter gaskets can further optimize performance for industrial, medical, aerospace, or high-humidity environments.
To explore the right membrane switch construction for your application, download our design guide or connect with our engineering team for support.
Membrane Switch Options
You can rest assured that Technomark uses the highest standards in manufacturing, and that includes the use of the best materials. We will provide the Membrane Switch options you need for a successful manufactured project.
Contact us if you don’t see what you need. We like to apply our creativity and wide-range experience to new challenges.
Graphic Overlays
- Hardcoated polyester or polycarbonate
- Screen printed solid colors or digital CMYKW and full-color logos
- Screen printed selective texture.
- Single level, two-level, or tactile snap embossing.
- Anti Newton’s rings
- Deadfronts
- Urethane coating
Graphic Overlays
- Hardcoated polyester or polycarbonate in gloss, matte, or textured finishes
- Screen printed solid colors or digital CMYKW for lower cost and halftones. We can even print digital full-color logos over metallic backgrounds. Private label options. Vary the overlay graphics and logo while using a common underlying switch. Or we can add a pocket that lets you insert paper-printed custom legends from behind the overlay.
- Screen printed selective texture. Leave windows gloss for clarity, create decorative effects, or use gloss to distinguish keys from surrounding texture.
- Single-level, two-level, or tactile snap embossing. Add rim or “pillow” emboss to keys, emboss logos, or add braille dots or locator bumps to keys.
- Anti Newton’s rings spacers. Transparent dots prevent rainbow effects in windows when they are in contact with transparent layers like touchscreens or ITO shields.
- Deadfronts blend into backgrounds to keep icons concealed until they are lit.
- Urethane coating can be applied over windows or other areas for a three-dimensional effect.
Circuits
- Screen printed polyester
- Two-sided printed switches
- Etched copper/polyimide flex-circuits
- Printed circuit boards (PCBs)
Circuits
- Screen printed polyester with integral ribbon tails is the most common and inexpensive construction. Keys can be arranged in matrix or common bus configurations.
- Two-sided printed switches allow traces to run under domes and LEDs, connecting to the upper side via printed holes and permit higher density circuitry.
- Etched copper/polyimide flex-circuits allow finer traces, such as 0.5 mm pitch tails, and solder mounting of components (instead of silver epoxy). They can be single or double-sided and typically have gold plated contacts.
- Printed circuit boards (PCBs) accommodate connectors and other components on the rear side in addition to domes and LED’s on the front.
Lighting Effects
- Indicator LEDs
- Side fire LEDs
- Electroluminescent (EL) backlighting
- Fiber optic layers
- NVIS compatible
- Integration with your PCBA.
Lighting Effects
- Indicator LEDs in single, bicolor, or RGB versions are a common and inexpensive option.
- Side fire LEDs work with light guide film to disperse light within a defined area. They can light individual keys, icons, or logos. You can even have a key or logo light different colors as signals to the user. The more LED’s the more brightness, making them suitable for low-level backlighting in dim conditions to a brightness that can stand out even in high-level indoor lighting.
- Electroluminescent (EL) backlighting can be added as a single layer beneath keys to give a pure, uniform illumination. EL adapts easily to complex shapes and switches with many cutouts. They require an AC inverter for power, vs simple DC for LEDs.
- Fiber optic layers can backlight switches using a single LED but have more constraints on size and geometry.
- NVIS compatible EL backlights and indicator LEDs do not interfere with night vision systems.
- Integration with your PCBA. If your design includes a PCB behind the switch, you can place the LEDs on it to shine through windows in the switch. This saves cost and allows larger lit areas. A new option is overlays with light guide film to mount directly to a PCB and receive its light from side fire LEDs on the circuit.
Switch Keys
- Tactile metal snap domes
- Embossed polyester tactile domes
- Non-tactile keys
- Capacitive touch sensors
- Large area keys
- Membrane Switch Wikipedia
Switch Keys
- Tactile metal snap domes, in sizes from 6 to 25 mm and forces from 200 to 700 g, give strong tactile feedback under all temperature conditions.
- Embossed polyester tactile domes cost less for high volume parts with many keys. They can be formed in the overlay or hidden inside internal layers.
- Non-tactile keys are the least expensive and longest lasting.
- Capacitive touch sensors have no moving parts. They can be operated through durable, rigid front panels like acrylic or glass and adapt well to backlighting. Technomark’s ITO scribing capabilities open up new possibilities for transparent control panels.
- Large area keys can be pressed at any point and can cover the entire switch surface if desired. Typical applications are allowing handheld devices to be triggered without looking at them, or hands-off switches that can be operated by a knee or foot.
- Membrane Switch Wikipedia
Components
- Embedded phototransistors let you adapt backlighting levels to ambient light.
- Other SMT components such as current limiting resistors, pullup resistors, and switching diodes are usually part of the interface electronics but can be integrated into the switch.
Connections
- Crimped connectors on ribbon tails have 0.1” pitch receptacles to mate with standard pin headers. Technomark has in house tooling for FCI (Berg), TEC (AMP), Molex, Nicomatic, and Memcon connectors. Latches, polarity plugs, and detents are optional.
- Exposed contacts mate with 1 mm pitch ZIF connectors on your PCB. 0.5 mm pitch is possible with etched flex-circuits.
Shielding
- Shields integrated into switches can intercept ESD to prevent damage to circuits, contain EMI/RFI within circuits, or keep EMI/RFI from other sources outside your circuit. Options include screen printed grids, solid foil, and transparent conductive ITO for window areas.
Panel Assembly Options
- Metal backers come in a variety of materials, finishes, and hardware options.
- Touchscreens can be integrated into switches and overlays. At the simplest level, the overlay covers and seals the gap between the screen and enclosure. A full switch can add buttons around the edge for improved user experience.
- Interface electronics. Technomark has provided custom electronics for functions from powering LEDs to converting key presses to HID-compliant USB keyboard output.
Environment
- UV stable overlay materials and window clarifying overprints withstand continuous exposure to sunlight.
- Perimeter seals, including VHB gaskets, meet IP65 standards.
- High humidity requires special techniques to prevent silver migration and circuit degradation. Technomark has extensive experience with switches used in these conditions.
Agency Approvals
- ISO 9001:2015 certified
- ITAR registered
- RoHS / REACH / Conflict Minerals
- UL PDGQ2 approved labeling
FAQ’s People Ask about Membranes Switches
Which type of tactile feedback dome works best in a higher heat environment?
Stainless Steel domes will out perform a polyester tactile dome in this situation.
Can you surface mount LEDS on my Membrane Switch?
Yes. We do it all the time!
What are the quantities required for prototypes and production?
For prototyping we typically do 5 to 10 parts or a lot-fixed number.
Production quantities vary from five to thousands.
To make sure you receive the highest quality parts, we require that we receive final approval from you before production commences. Our Design Team has the ability to create your product from an idea, drawing, picture, and more.
Is tactile feel needed on any of the dome types?
We offer both metal domes, which can be either stainless steel or gold plated, and poly domes. Tactile feel is not required and open to customer preference.
What are the different types of termination you offer?
AMP, Berg, Nicomatic. Different centers and of course open contacts for ZIF application.
What metal dome sizes are available for membrane switches?
8MM, 10MM, 12MM, 14MM, 20MM
What is the actuation force of domes?
Dome force ranges from 85 grams to 700 grams.
What is the typical lead time for custom membrane switch manufacturing?
Because we manufacture custom products our “lead times” are dependent on volume and complexity of the project. We make every effort to deliver your part the way you want it, when you want it.
How robust is an EL lamp over a stainless steel dome incorporated in a membrane switch?
We have tested our EL lamps up to 1,000,000 cycles without showing any degradation or failure.
Request a Quote Online
Our team can get you started on your next project.
The Technomark design and engineering team will work with you to fully understanding your needs, from collaboration, design verification, sourcing the best materials, prototyping, and manufacturing to your exacting standards.
Before delivery, parts are visually inspected and electrically tested for functionality.
Technomark, Inc.
11574 Encore Circle
Minnetonka, MN 55343
952.912.1700
