Patent ID: 8709947

Claim:
A method for forming a pattern, comprising: forming a processed film above a substrate; forming a first film pattern having a wide width dimension above the processed film; forming a second film pattern covering a portion of the first film pattern and a third film pattern connected to the second film pattern together above the processed film, the third film pattern having a width dimension narrower than the first film pattern, and to be a line pattern of a line and space pattern; forming a fourth film conformally so as to cover a remaining portion of the first film pattern, the second film pattern, and the third film pattern; forming a film pattern by the fourth film on a side face of the first film pattern and a plurality of film patterns by the fourth film to be a line pattern of a line and space pattern on both side faces of the third film pattern, by etching the fourth film until a remaining portion surface of the first film pattern, a surface of the second film pattern, and a surface of the third film pattern are exposed; removing the second film pattern and the third film pattern; and etching the processed film by using the plurality of film patterns by the fourth film formed on the both side faces of the third film pattern and a wide pattern formed by combining the first film pattern and the film pattern by the fourth film formed on the side face of the first film pattern as masks.