Patent ID: 8940475
Filing Date: 2015-01-27
Classification: G03F,H01L,Y10S,Y10T

Abstract:
1. A method for double patterning a substrate, comprising: forming a first layer of radiation-sensitive material; preparing a first pattern in said first layer of radiation-sensitive material using a first lithographic process, said first pattern being characterized by a first critical dimension (CD); following said preparing said first pattern, performing a first CD slimming process to reduce said first CD to a first reduced CD; freezing said first pattern with said first reduced CD in said first layer of radiation-sensitive material using a freeze process; forming a second layer of radiation-sensitive material on said first pattern with said first reduced CD in said first layer of radiation-sensitive material; preparing a second pattern in said second layer of radiation-sensitive material using a second lithographic process, said second pattern being characterized by a second CD; and following said preparing said second pattern, performing a second CD slimming process to reduce said second CD to a second reduced CD.