Patent ID: 9034762
Filing Date: 2015-05-19
Classification: H01L,Y10S

Abstract:
1. A triple patterning method, comprising: providing a substrate having a first region and a second region; forming a first material layer on the substrate; forming a second material layer on the first material layer; forming a plurality of core patterns on the second material layer in the first region; forming sidewall spacers on side surfaces of the core patterns; forming first patterns on the first material layer by etching the second material layer using the sidewall spacers as an etching mask; forming a third material layer on the first material layer and the first patterns; forming a plurality of second patterns on the third material layer in the first region and a plurality of the third patterns on the third material layer in the second region; forming fourth patterns by etching the third material layer using the second patterns and the third patterns as an etching mask; and forming triple patterns on the substrate in the first region and fifth patterns on the substrate in the second region using the first patterns, the second patterns, the third patterns and the fourth patterns as an etching mask.