Patent ID: 9105587
Filing Date: 2015-08-11
Classification: C09K,C23F,H01L

Abstract:
1. A method of forming a semiconductor device structure, comprising: forming a patterning material over a base material; exposing the patterning material to a chemistry comprising sulfur dioxide and a halogen-based compound while applying a bias power to remove at least a portion of the patterning material and define a plurality of features in the patterning material; after exposing the patterning material to the chemistry comprising sulfur dioxide and the halogen-based compound while applying the bias power, stopping the bias power and exposing the patterning material to the same chemistry comprising sulfur dioxide and the halogen-based compound to alter a lateral dimension of the features of the plurality of features and form a pattern of trimmed features; and exposing the base material to the same chemistry comprising sulfur dioxide and the halogen-based compound while applying the bias power to remove at least a portion of the base material.