Apparatus having contacts made from carbon tracks and method of producing them
OwnerHubert Farizon, Jean-Michel Grigneinventors
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Abstract
This apparatus has a printed circuit board 10 and contacts made from carbon tracks. These carbon tracks (52, 44) are disposed on the printed circuit board (10) by means of an insulating layer (54, 42) plated on the printed circuit board. Application: Production of a keypad for a mobile telephone.
Claims5
An apparatus containing a printed circuit board and contacts made from carbon tracks, characterized in that the carbon tracks are disposed on the printed circuit board by means of an insulating layer plated on the printed circuit board.
A method of producing carbon track contacts on a printed circuit board having a multitude of passages, characterized in that it includes the following steps:
- at least partially plugging at least one of said passages,
- depositing a layer isolating in itself on said printed circuit board,
- depositing carbon tracks for said keypad.
Dependencies are inferred from the claim text.