Here are some of our most frequently asked questions about membrane keypads.
What are some standard features of membrane switches?
- Maximum part size (including flex tail): 12″ x 18″
- Digitally printed graphics (unlimited CMYK colors + White)
- Overlay material: 0.006″ to 0.008″ textured, gloss, or anti-glare hardcoat polyester
- Switch layers: 0.005″ to 0.010″ circuit and 0.009″ to 0.014″ spacer
- Rear adhesive: .002″ to .005″ 3M 200MP or 300LSE pressure-sensitive adhesive
- Screen printed graphics and tinted windows (PMS spot colors or metallic)
- Printed top surface texture
- Overlay embossing (rim or pillow)
- Metal snap domes for an optimum tactile response
- Top/bottom circuit construction
- RFI or EMI shield layer
- Perimeter seal (Nema or IP Rated)
How quickly can I get membrane switch prototypes made?
The expected timeframe for production and delivery depends on our current in-house capacity and whether we have all the materials needed for your prototype’s design in stock. Our lead times for membrane switches are approximately 3-5 weeks.
If your product needs additional or different features, contact us today to see if we can create a custom solution for you.
What goes into a membrane switch design?
1. Defining Product Requirements and Operating Environment
2. Pricing and Production Location
3. Quality Considerations/Approvals
4. Material Needed
5. Adhesive
6. Circuit & Tail Design
7. ESD Shielding (Optional)
8. Tactile vs. Nontactile Keys
9. Backlighting (Optional)
10. Forming/Embossing (Optional)
11. Selective Textures and Height Requirements
To read the details of every step of the membrane switch design process, download our design guide.
Does a membrane switch work as a latching switch?
No. A membrane switch is considered a momentary switch, meaning that they are always open. When a button is pressed on the switch, the printed circuitry is momentarily closed.
What is the difference between tactile and non-tactile membrane switches?
Tactile membrane switches will give off a tactile response, such as a clicking sensation when pressed. Non-tactile controls do not have a physical snap when pressed. A non-tactile switch typically indicates a physical press through light or sound. Read more about tactile and non-tactile buttons here.
Did you know? Membrane switches can be designed to NEMA or IP66 standards. For a complete list of BTI's certifications, check them out here.
Can you make membrane switches waterproof?
Engineers can add moisture seals for extra durability. The protective layer can be submersible and able to withstand moisture and water spray.
Can you make membrane switches chemical resistant?
Yes, the top layer of the membrane switch, known as a graphic overlay, can be designed with extra durable materials and seals to keep the device safe from chemicals.
Can the membrane switch be UV resistant?
Yes, membrane switches can be created to not degrade in sunlight or UV rays based on the materials and inks used.
Will the membrane switch continue to work if exposed to heat and humidity?
Engineers can make membrane switches with specific materials that can be heat resistant. This means they won’t warp or buckle in warm environments.
Design tip: There are many design requirements for a graphic overlay. Read more about how graphic overlays impact membrane switch design here.
Can I design my membrane switch to be scratch-resistant?
Yes, certain materials can be selected to add durability to your product, so it can withstand abrasion.
Can membrane switches have anti-glare properties?
Based on the materials used, membrane switches can have anti-glare properties.
Can LEDs be incorporated into membrane switch design for haptic feedback?
Yes, our engineers can incorporate LEDs and backlighting to indicate the device has been activated. Read more about backlighting here.
What is the best material I can use for the circuitry in my membrane switch?
Copper flex circuitry can be integrated to accommodate the need for superior circuit performance, including high speed and signal integrity applications.
How does the conductive ink work in a membrane switch?
The inks provide a slim conductive profile that works similar to a wire. Once the membrane switch is pressed, the conductive ink circuit is complete, and the response is sent to the computer. To read more about conductive inks in membrane switches, click here.
Is BTI’s membrane switch production done in the United States?
Yes, we are a U.S. manufacturing company that will produce your product. However, we do work with offshore partners to finish some projects.
Can membrane switches be customized to my needs?
Yes, our team creates custom membrane switch designs for your specified needs.