Method for producing a self-supporting metal film

Details Method for producing a self-supporting metal film Method for producing a self-supporting metal film

C - Chemistry, Metallurgy

25

D

C25D 1/04 (2006.01) C25D 5/16 (2006.01) C25D 5/48 (2006.01) H05K 3/38 (2006.01) H05K 3/04 (2006.01) H05K 3/24 (2006.01)

Patent

CA 2353965

The invention relates to a method for producing a self-supporting metal film (40), especially copper film, which has a lower cohesive strength due to its microstructure and which can be formed so as to produce sharp edges. According to the invention, a base layer is deposited on the cylinder cathode (22) in a galvanic manner. A cauliflower-like structure (60) is adherently deposited from the metal onto the metal base layer (58) by means of an additional anode (32) between the cylinder cathode (22) and the anode basket (24). The metal film (40) consisting of the metal base layer (58) and the cauliflower-like structure (60) is removed from the cylinder cathode (22), rinsed and dried. The dried film (40) consisting of the metal base layer (58) which is provided with the cauliflower-like structure (60) is moved through a black oxide bath (46), whereupon rinsing and drying occurs.

L'invention concerne un procédé pour produire une feuille métallique autoportante (40), notamment une feuille de cuivre, possédant en raison de sa structure une faible adhérence et pouvant être structurée de manière à présenter des arêtes vives. Selon ce procédé, une couche de base de la feuille métallique (40) est déposée par voie galvanique sur un cylindre-cathode (22). Une anode supplémentaire (32) placée entre le cylindre-cathode (22) et la corbeille à anode (24) est utilisée pour déposer sur la couche de base métallique (58) une structure en chou-fleur (60) constituée dudit métal, adhérant fortement sur ladite couche de base. La feuille métallique (60) est retirée du cylindre-cathode (22), puis nettoyée et séchée. La feuille séchée (40) constituée de la couche de base métallique (58) à structure en chou-fleur (60) est passée dans un bain d'oxyde noir (46), avant d'être nettoyée puis séchée.

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