Membrane switches and graphic overlays
Design Considerations:
Design freedom begins when you integrate membrane switches into your product. Because no single configuration can always meet your requirements, we will tailor your membrane switch and graphic overlay to fit the application and your specifications.
- Materials: Depending on the application and environmental requirements, Polyester and Polycarbonates are commonly used. Thickness ranges are .007" to .010". Blended materials and UV hardcoat surfaces are additional options.
- Selective Texturing: For hardcoats as well as aesthetic enhancement of the graphic overlay.
- Embossing: Embossing of the key pads for key location can be achieved by full key pad embossment or rim embossment.
- Windows: Transparent and deadfront display windows for viewing LCD and LED displays.
- Termination: Tail termination is accomplished by snap fit connectors, solder tabs, or exposed silver tabs (.100" centers typical).
- Tactile Feedback: Stainless steel domes range from 8-20mm. Poly domes are embossed onto a polyester layer or circuitry.
- Shielding: Shielding from EMI/RFI can be accomplished by a layer of metallized polyester or by screening a layer of selective graphite ink.
- Backlighting: Douglas offers several options for the various information readout devices available to fit customer requirements.
- Panel Cutouts: Die cut holes and access for mechanical switches may be incorporated into membrane switch designs.
- Back-Plates and Printed Circuit Boards: Available as a finished assembly with Douglas membrane switches.
- Environmental Design: Applications subject to various degrees of chemical exposure, moisture or high humidity are engineered and constructed accordingly.
- Graphic Design and Engineering Assistance: Full service art and engineering departments are ready to provide complete or partial assistance in the aesthetic design of graphic overlays and the engineering of correct switch construction for your application.
Quotation Request:
The more information that is supplied regarding applications, functional requirements and environmental concerns, the more accurate our quotation will be.
- Switch application
- Quantities required for prototypes and production
- Material requirements
- Graphic overlay material, polycarbonate or polyester
- Overlay finish requirement
- Number of colors to be printed on graphic overlay
- Overall dimensions or prints
- Embossing requirements
- Type of termination required and tail length
- Dome type, if tactile feel is needed
- Pinout requirements
- Environmental concerns
- Back-lighting
- Other special requirements
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