Patent ID: 9081285
Filing Date: 2015-07-14
Classification: G03F,H01L

Abstract:
1. A method for processing a structure including a substrate, a first processed layer on the substrate, and a first tone resist layer over the first processed layer, wherein the method comprises: exposing only a portion of the first tone resist layer to radiation; in response to said exposing only a portion of the first tone resist layer to radiation, developing the first tone resist layer to form at least one feature in the first tone resist layer covering only a portion of the first processed layer; subsequent to said developing the first tone resist layer, etching portions of the first processed layer that are not underneath the at least one feature in the first tone resist layer to form a selected region; subsequent to said etching portions of the first processed layer, stripping the at least one feature in the first tone resist layer; subsequent to said stripping the at least one feature in the first tone resist layer, forming: exposing only a portion of the second tone resist layer to radiation; in response to said exposing only a portion of the second tone resist layer to radiation, developing the second tone resist layer to form at least one feature in the second tone resist layer covering only a portion of the second processed layer; and subsequent to said developing the second tone resist layer, etching portions of the second processed layer and the selected region that are not underneath the at least one feature in the first tone resist layer.