A manufacturing process for printed circuits

H - Electricity – 05 – K

Patent

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H05K 3/20 (2006.01) H05K 3/06 (2006.01)

Patent

CA 2279340

A printed circuit manufacturing process includes starting with a piece of conductive material (10) such as copper. One side (11) of the conductive material (10) is chemically machined or cut to form grooves (13) corresponding to the desired design of the printed circuit. A dielectric material (14) is then injection-molded onto the conductive material (10) so that the dielectric material (14) fills the grooves (13) that have been formed in one side (11) of the conductive material (10). The opposite side (12) of the conductive material (10) is then subjected to a process to form the grooves (16) that correspond to the desired printed circuit design (15). The grooves (16) formed during this latter step preferably are coincident with those (13) formed in a previous machining step. In one embodiment, more than one assembly of dielectric and conductive material are adhered together to form a double faced circuit.

Un procédé de fabrication de circuits imprimés consiste tout d'abord à prendre un morceau de matériau conducteur (10) tel que du cuivre. Une face (11) de ce matériau conducteur (10) est usinée ou découpée chimiquement pour y former des rainures (13) correspondant à la configuration souhaitée du circuit imprimé. Un matériau diélectrique (14) est ensuite moulé par injection sur le matériau conducteur (10) afin que le matériau diélectrique (14) remplisse les rainures (13) qui ont été pratiquées dans une face (11) du matériau conducteur (10). La face opposée (12) du matériau conducteur (10) est ensuite soumise à un processus pour former les rainures (16) correspondant à la configuration du circuit imprimé souhaitée (15). Ces rainures (16) formées au cours de cette dernière étape coïncident de préférence avec celles (13) formées lors d'une étape d'usinage précédente. Dans un mode de réalisation, plus d'un ensemble de matériaux diélectrique et conducteur sont collés conjointement pour former un circuit double face.

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