Patent ID: 8497060
Filing Date: 2013-07-30
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a stacked film including a first layer, a second layer, and a third layer on a substrate, the first layer being formed on the second layer, the second layer being formed on the third layer, and the third layer being formed on the substrate; forming a first resist pattern on the stacked film; forming a first film pattern of the first layer by etching the uppermost layer of the stacked film, which is the first layer, using the first resist pattern as a mask; after removing the first resist pattern, covering a first part of the first film pattern with a second resist pattern; slimming a second part of the first film pattern on an area exposed from the second resist pattern using etching; removing the second resist pattern, thereby forming a second film pattern of the first layer; etching the second layer with the second film pattern, thereby forming a third film pattern comprised of stacked parts of the first layer and the second layer, the third film pattern including a first part corresponding to the first part of the first film pattern and a second part corresponding to the second part of the first film pattern, a pattern width of the first part of the third film pattern not having been slimmed and a pattern width of the second part of the third film pattern having been slimmed by the slimming the second part of the first film pattern on the area exposed from the second resist pattern; after the etching the second layer with the second film pattern, covering the first part of the third film pattern with a third resist pattern; removing portions of the first layer of the first film pattern on an area exposed from the third resist pattern using etching, so that portions of the second layer under the removed portions of the first layer remain; after removing the third resist pattern, forming sidewall spacers at respective sidewalls of the first part of the third film pattern and the remained portions of the second layer in a corresponding part to the second part of the third film pattern; after the forming the sidewall spacers at respective sidewalls of the first part of the third film pattern and the remained portions of the second layer in the corresponding part to the second part of the third film pattern, removing the remained portions of the second layer exposed; etching the third layer using unremoved portions of the first layer in the corresponding part of the first part of the third film pattern and the sidewall spacers as masks, thereby forming a fourth film pattern; and after the forming the fourth film pattern, removing the unremoved portions of the first layer and the second layer of the fourth film pattern and the sidewall spacers to leave a fifth film pattern comprised of portions of the third layer.