Patent ID: 9070639
Filing Date: 2015-06-30
Classification: H01L

Abstract:
1. A method of forming an etch mask above a semiconductor device, the method comprising: forming an opening in a mask layer formed above at least one further mask layer and a material layer to be patterned, said opening extending through said mask layer and exposing a surface of a first layer formed below said mask layer; performing a selective deposition process by initiating selective growth of material on an exposed sidewall surface of said mask layer so as to reduce a width of said opening from a first width to a second width while maintaining exposure of at least a portion of said previously exposed surface of said first layer, wherein during said selective deposition process said material is formed only on said exposed sidewall surface of said mask layer and not on an upper surface of said mask layer; and patterning said at least one further mask layer by using said opening having said reduced width.