Custom made Flexible keypad with carbon pill

A keypad with carbon pill contacts combines a flexible molded key surface with conductive regions positioned for the circuit board. Each key must bring its contact into the intended relationship with the board and return after the user's press. Custom geometry can coordinate the key field with the housing.

Check the placement of the conductive feature beneath the moving section. A key pressed at its edge can tilt, changing the way the contact approaches the board. The panel should guide the button without gripping its wall or preloading it toward the contact.

During assembly, keep the underside away from oily fingers, loose dust and adhesive residue. Seat the entire keypad before closing the case, then operate every key with the actual board in place. If response changes after the enclosure is secured, inspect compression and support spacing first. Avoid scraping the carbon surface or adding an improvised conductive coating to compensate for an alignment problem. The correct replacement needs the intended contact positions and molded travel, not simply a matching pattern of visible key tops.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Each key must bring its contact into the intended relationship with the board and return after the user's press.

Custom dimensions

A keypad with carbon pill contacts combines a flexible molded key surface with conductive regions positioned for the circuit board.

Fit & assembly

Seat the entire keypad before closing the case, then operate every key with the actual board in place.

Use & inspection

The correct replacement needs the intended contact positions and molded travel, not simply a matching pattern of visible key tops.

Photos illustrate structure or material only. A key pressed at its edge can tilt, changing the way the contact approaches the board. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.