Patent ID: 9017540
Filing Date: 2015-04-28
Classification: C23C,C25D,H05K

Abstract:
1. A method for manufacturing a printed circuit board assembly, the method comprising: applying a first resist layer on at least one part of a substrate having a first copper layer formed on a first surface of the substrate; applying a first image to at least one part of the first resist layer; developing the first resist layer in accordance with the first image; applying a second copper layer on a surface of the first copper layer; electroplating a first metallic layer on at least a portion of a surface of the second copper layer; removing the first resist layer; etching at least a portion of the first copper layer; removing the first metallic layer; depositing a third copper layer that contacts and covers at least a portion of the second copper layer, at least a portion of the first copper layer, and at least as portion of the substrate of the printed circuit board assembly; applying a second resist layer on the third copper layer; applying a second image to at least one part of the second resist layer; developing the second resist layer in accordance with the second image; electroplating a preselected metal layer on at least a portion of the third copper layer; removing the second resist layer; and etching the third copper layer from at least a portion of the second copper layer not covered by the preselected metal layer, the at least a portion of the first copper layer, and the at least portion of the substrate.