Custom transparent carbon pucks for silicone keypad

Carbon pucks provide conductive contact regions within a compatible silicone keypad design. A clear or transparent keypad body can be customized around those regions, allowing the visible rubber and the switching interface to be developed together. The clear appearance applies to the selected silicone construction, while the contact features have their own electrical role.

Position each puck according to the board contact and intended key movement. The supporting rubber should return the key freely after the contact is released. Compare operation from different points on the key top, especially where a large face can tilt during pressing.

Review the assembled appearance if the body remains visible in the finished control. Internal contact features and board colors can show through clear silicone and should be considered during layout design. Keep the visible surfaces clean as well as protecting the underside from contamination. During assembly checks, verify alignment after the housing is secured. Avoid altering the pucks with unapproved surface treatments to compensate for an inconsistent key; correct the mechanical fit and contact relationship that the keypad is intended to use.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. The supporting rubber should return the key freely after the contact is released.

Custom dimensions

Position each puck according to the board contact and intended key movement.

Fit & assembly

During assembly checks, verify alignment after the housing is secured.

Use & inspection

Keep the visible surfaces clean as well as protecting the underside from contamination.

Photos illustrate structure or material only. Internal contact features and board colors can show through clear silicone and should be considered during layout design. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.