Patent ID: 6716761
Filing Date: 2004-04-06
Classification: H01L

Abstract:
A method of forming a fine pattern, comprising:a lithography step for forming a resist pattern on a film to be processed deposited on a substrate using a lithography technique, a first etching step for etching said resist pattern to narrow the line width of said resist pattern, a second etching step for performing anisotropic etching to a first film to be processed underneath said resist pattern, under a reduced pressure environment where the etching rate of an exposed area of the first film in the vicinity of the side of said resist pattern is higher than the etching rate of other exposed areas of the first film, to expose a second film to be processed underneath said first film to be processed in the vicinity of the side of the line of said resist pattern, and to form the pattern of said first film to be processed, and a third etching step for etching said second film to be processed using the pattern of said first film to be processed as a mask, to form a pattern of a pitch of Â½ the pitch of said resist pattern on said second film to be processed.