Patent ID: 7378225
Filing Date: 2008-05-27
Classification: G03F,H05K

Abstract:
1. A method of producing a metal pattern on a substrate comprising the steps of: a) providing a first photoimageable dry-film layer on the substrate; b) laminating a second photoimageable dry-film layer directly over the first photoimageable dry-film layer, wherein said second photoimageable dry-film layer is formulated to have a slower development time than the first photoimageable dry-film layer and/or a faster curing speed than the first photoimageable layer; c) placing a negative image of the desired metal pattern over the second photoimageable dry-film layer and exposing the first photoimageable dry-film layer and the second photoimageable dry-film layer to actinic radiation; d) developing off uncured areas of the first photoimageable dry-film layer and the second photoimageable dry-film layer with a developer capable of developing off uncured areas of both the first photoimageable dry-film layer and the second photoimageable dry film layer to produce an image on the substrate; c) depositing metal onto the substrate, wherein the metal is deposited over both the patterned areas and unpatterned areas of the substrate; and f) stripping the first photoimageable dry-film layer and the second photoimageable dry-film layer from the substrate to leave the metal pattern on the substrate.