Patent ID: 7741016
Filing Date: 2010-06-22
Classification: G03F

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a first insulating film over a substrate; forming a first photoresist film over the first insulating film; exposing to the first photoresist film a first mask pattern having an interconnection pattern; exposing to the first photoresist film a second mask pattern having a hole positioned at an end or a bent portion of the interconnection pattern where a hole to be connected to the interconnection pattern is to be formed; developing the first photoresist film which has been exposed to the first mask pattern and the second mask pattern; etching the first insulating film with the first photoresist film as a mask to form an interconnection trench having the interconnection pattern; burying a conductive film in the interconnection trench to form an interconnection layer having the interconnection pattern; forming a second insulating film over the substrate with the interconnection layer formed on; forming a second photoresist film on the second insulating film; exposing to the second photoresist film a third mask pattern having a plurality of holes to be connected to the interconnection pattern; developing the second photoresist film which has been exposed to the third mask pattern; etching the second insulating film with the second photoresist film as a mask to form contact holes in the second insulating film; and burying a conductive film in the contact holes to form contact plugs connected to the interconnection layer, wherein pattern data of the second mask pattern are given by extracting a hole positioned at the end or the bent portion of the interconnection pattern of the first mask pattern, from a pattern data of the third mask pattern.