Patent ID: 9074293
Filing Date: 2015-07-07
Classification: C25D

Abstract:
1. A method for manufacturing a porous electroformed shell for patterning, the method comprising the steps of: providing an epoxy mandrel having a patterned surface; forming a conductive thin film having an upper surface on said patterned surface of said epoxy mandrel, and causing said patterned surface of said epoxy mandrel to be conductive; providing a wet-transfer masking film having a plurality of spaced-apart non-conducting ink dots forming a non-conductive masking pattern, wherein said dots have a diameter within a range of 0.2 to 0.45 mm and an interval between said dots is within a range of 3.5 to 10 mm; transferring said plurality of spaced-apart non-conducting ink dots of said non-conductive masking pattern onto said upper surface of said conductive thin film by using said wet-transfer masking film; removing said wet-transfer masking film through water dissolution, with said non-conducting ink dots of said non-conductive masking pattern remaining on said upper surface of said conductive thin film, wherein said non-conductive masking pattern corresponds to a position of a fine pore; electrodepositing an electroforming metal directly atop said upper surface of said conductive thin film to form a single electroformed layer, while generating and growing the fine pore in said electroformed layer solely at a position of said non-conductive masking pattern transferred to said upper surface of said conductive thin film; and separating said electroformed layer having said fine pore from said epoxy mandrel, wherein said fine pore of said porous electroformed shell has a cup shape having a front-side opening diameter which is within a range of 0.02 to 0.35 mm, and a rear-side opening diameter which is within a range of 1.20 to 3.50 mm.