Method of electroforming articles using a photomask mandrel

Details Method of electroforming articles using a photomask mandrel Method of electroforming articles using a photomask mandrel

C - Chemistry, Metallurgy

25

D

204/185, 96/256,

C25D 1/10 (2006.01) G03F 7/20 (2006.01)

Patent

CA 1269342

ABSTRACT A method for making a metallic article by electroforming, in which a mandrel is first prepared by depositing a first continuous layer of a conductive film on a non-conducting substrate and a second continuous layer of photoresist on the conductive film. The photoresist is exposed through a photomask, and developed to produce a pattern on the conductive film corresponding to the configuration of the article to be electroformed. The conductive film is then made the cathode in an electroforming solution with an anode comprising a metal to be deposited, and an electric current is passed until the desired thickness of metal to form the metallic article has been deposited on the mandrel. The photoresist can be removed after the electroforming to facilitate separation of the article from the mandrel, and the removal can be further facilitated by contacting with an adherent polymeric material such as polyvinyl butyral.

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