Patent ID: 8765610

Claim:
A method for manufacturing a semiconductor device comprising: forming a first core film extending in a first direction, on a first film to be processed; forming a first spacer film on a wall portion of the first core film; removing the first core film and leaving the first spacer film on the first film to be processed; processing the first film to be processed into a first line and space pattern which extends in the first direction and includes a pair of first line patterns connected at an end in the first direction via a loop portion, by an etching using the first spacer film as a mask; forming a second film to be processed on the first line pattern and the loop portion; forming a plurality of second core films extending in a second direction intersecting the first direction, on the second film to be processed, the second core film having a first array portion which is arranged in the first direction so as to be spaced at a first space, and a second array portion which is arranged so as to be spaced at a second space larger than the first space in the first direction from the first array portion, the second space being positioned above the loop portion; forming a second spacer film on a wall portion of the second core film; removing the second core film and leaving the second spacer film on the second film to be processed; and processing the second film to be processed below the first array portion into a second line and space pattern which includes a second line pattern extending in the second direction without removing the first film below a space between the second spacer film, and removing the second film to be processed below the second space and the loop portion of the first film to be processed at the same time of processing the second film, by an etching using the second spacer film as a mask.