Patent ID: 8398877
Filing Date: 2013-03-19
Classification: B81C,H01L

Abstract:
1. A method of forming one or more openings in a layer of a selected material, the method comprising: (a) forming a polymer resist layer over said selected material; (b) depositing a first solution onto the surface of said polymer resist layer at a first set of one or more target locations, said first solution selected to increase permeability of the polymer resist layer through its entire thickness to a second solution, in an area which has had the first solution applied, and the second solution being an etchant or solvent for the selected material; (c) contacting said polymer resist layer with said second solution, whereby the second solution permeates the polymer resist layer through its entire thickness in the area of increased permeability and forms an opening in the selected material beneath the area of increased permeability.