Patent ID: 9275800
Filing Date: 2016-03-01
CPC Classification: H01G,Y10T

Claim Text:
1. A method for patterning a metal substrate, the method comprising the steps of: applying a photo-sensitive layer on a surface of a metal substrate; forming a patterned surface on the photo-sensitive layer; removing at least a portion of the patterned surface of the photo-sensitive layer to create a patterned resist and a plurality of unmasked areas on the metal substrate; forming a hydrate layer in at least one of the unmasked areas; removing the patterned resist to expose at least one portion of the surface of the metal substrate; and etching at least one exposed portion of the surface of the metal substrate to initiate tunnels in the metal substrate, thereby forming a patterned metal substrate, wherein the hydrate layer acts as a mask during the etching.