Patent ID: 7816270

Claim:
A method of manufacturing a semiconductor device in which an even number of insert patterns are formed by double patterning between a first basic pattern disposed at a left side and a second basic pattern disposed at a right side which are transversely separated from each other on a semiconductor substrate, wherein a first insert pattern and a second insert pattern are alternately repeated to form the insert patterns, the method comprising: (a) forming a first material layer on the semiconductor substrate; (b) forming a first pattern of a second material layer on the first material layer, wherein the first pattern of the second material layer comprises a trench that is partially and vertically etched from an upper surface of the first pattern; (c) forming hardmask layer patterns on the first pattern of the second material layer, wherein the hardmask layer patterns respectively correspond to a region where the first basic pattern, a region where the second basic pattern and a region where the first insert pattern are to be subsequently formed; (d) using the hardmask layer patterns as an etching mask to etch the first pattern of the second material layer to expose the first material layer, thereby forming second patterns of the second material layer; (e) forming a first pattern of a third material layer on the second patterns of the second material layer to form a plurality of first spaces between the adjacent second patterns; (f) forming first patterns of a fourth material layer on the first pattern of the third material layer, thereby filling the plurality of first spaces; and (g) using the second patterns of the second material layer and the first patterns of the fourth material layer as an etching mask to etch the first pattern of the third material layer, and then to etch the first material layer, thereby forming a first pattern of the first material layer including the first basic pattern, the second basic pattern, the first insert pattern, and the second insert pattern, wherein the trench is disposed on the region where the second basic pattern is to be subsequently formed, and a hardmask layer pattern among the hardmask layer patterns is arranged such that a left side surface of the hardmask layer pattern corresponding to the region of the second basic pattern is located inside the trench, and a right side surface of the hardmask layer pattern is located outside the trench.