Patent ID: 9581899
Date: 2017-02-28
CPC Classifications: B81B,B81C,G03F,H01L

Claim:
1. A method of forming a patterned structure comprising: providing a template layer over a substrate; patterning said template layer to form a patterned template layer over said substrate, said patterned template layer containing a first linear portion extending along a lengthwise direction and having a first length, a second linear portion that is parallel to said first linear portion and having a second length that is less than said first length and having a uniform width, and blocking template structures having a blocking template structure width that is greater than said uniform width; applying a block copolymer material over said substrate and on said patterned template layer, wherein said block copolymer material includes alternating chains of a first polymeric block and a second polymeric block, said first polymeric block including a chain of a first polymeric block component and a second polymeric block including a chain of a second polymeric block component; inducing self-assembly of polymeric block components within said block copolymer material employing said patterned template layer as a template for alignment, wherein a polymeric block component portion parallel to said first and second linear portions, having a third length that is less than said second length, and having another uniform width is formed between a pair of blocking template structures among said blocking template; and removing said first polymeric block component selective to said second polymeric block component, wherein a trench pattern defined by trenches embedded within said second polymeric block component is formed.