Selecting the Right Metal Dome for a Membrane Keypad
The metal dome is responsible for the tactile feel and switching response of a membrane keypad.
Important selection parameters include:
- Dome diameter
- Actuation force
- Travel distance
- Operating life
- Key size
- Available assembly space
A dome with very low force may activate accidentally, while excessive force can make the keypad uncomfortable during frequent operation.
Design Considerations
The graphic overlay, embossing height and spacer construction must also be designed according to the selected dome.
Proper dome selection helps deliver consistent tactile response, reliable switching and a better user experience.
