Patent ID: 9142419
Filing Date: 2015-09-22
Classification: H01L

Abstract:
1. A semiconductor device manufacturing method comprising: forming on a film to be processed a mask material film which has first openings each including a constriction; forming a sidewall film on the sidewall of the first openings in the mask material film, wherein the diameter of the first openings are narrowed to form a plurality of second openings in the mask material film, and the constriction of the first openings are filled with the sidewall film to separate adjacent second openings; and making a plurality of holes by selectively etching the film to be processed with the mask material film and sidewall film as a mask, and wherein the plurality of second openings are surrounded by the sidewall film, and wherein the thickness of the sidewall film is set at S or more, if the minimum width of the first opening is 2S.