Customized conductive silicone keypads/silicone numeric keypads

Conductive silicone keypads need their underside contacts to follow the same layout as the numeric circuit pattern. The locating arrangement should maintain that registration across the sheet, including keys far from the main locating points. Small shifts can affect an outer key differently from one near the center.

Coordinate board mounts, enclosure openings and the molded web when defining the assembly. The sheet should sit without being stretched between supports, and the contacts should remain clear at rest until a key is pressed. The finished geometry needs evaluation with the actual circuit rather than an assumed contact resistance or actuation value.

During assembly checks, operate keys at different positions in the numeric layout instead of relying on one central button as representative. After servicing, inspect both the board seating and the rubber before closing the housing. A contact problem appearing only along one edge can indicate registration or clamping that needs correction, even when the rest of the keypad continues to operate normally.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. The sheet should sit without being stretched between supports, and the contacts should remain clear at rest until a key is pressed.

Custom dimensions

The locating arrangement should maintain that registration across the sheet, including keys far from the main locating points.

Fit & assembly

During assembly checks, operate keys at different positions in the numeric layout instead of relying on one central button as representative.

Use & inspection

After servicing, inspect both the board seating and the rubber before closing the housing.

Photos illustrate structure or material only. Small shifts can affect an outer key differently from one near the center. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.