Silicone rubber membrane keypad push button

Silicone rubber membrane keypad design uses a flexible molded region around the button to accommodate movement during a press. The membrane geometry works with the selected hardness to determine how the key travels and returns. Custom dimensions allow the keypad to suit the surrounding electronic assembly rather than relying on a generic button pitch.

The flexible web needs room to move. Housing edges, ribs, and neighboring components should not rub against it through the operating stroke. A button that feels acceptable before assembly can behave differently once its perimeter is clamped, making assembled evaluation particularly useful.

Choose the button face for the intended interaction, then relate its height and area to the supporting membrane below. Closely spaced keys also need enough separation that a press does not drag the adjacent face. Identification can be incorporated through the available color and molded marking options.

When closing the product housing, keep the keypad registered to its locating features and avoid trapping the flexible sections. Test the keys around the outside of the mat as well as those in the center, since enclosure support can differ across the layout.

Material options

Silicone. Custom formulation and color for the intended contact conditions.

Hardness selection

Silicone: 20–80 Shore A. Silicone rubber membrane keypad design uses a flexible molded region around the button to accommodate movement during a press.

Custom dimensions

Custom dimensions allow the keypad to suit the surrounding electronic assembly rather than relying on a generic button pitch.

Fit & assembly

A button that feels acceptable before assembly can behave differently once its perimeter is clamped, making assembled evaluation particularly useful.

Use & inspection

Choose the button face for the intended interaction, then relate its height and area to the supporting membrane below.

Photos illustrate structure or material only. The membrane geometry works with the selected hardness to determine how the key travels and returns. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.