Patent ID: 6936924
Filing Date: 2005-08-30
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first insulation film having a contact hole; a second insulation film formed on the first insulation film and having an opening; a third insulation film formed on the opening and the second insulation film; a first wiring groove continuous to the opening of the second insulation film, formed in the third insulation film; and a surface of the first insulation film having a first portion with a substantial taper, the first portion defining the contact hole and extending to the opening of the second insulation film, and a second portion being substantially vertical, wherein the first portion is defined by a side wall with the substantial taper which extends in a lengthwise direction of the first wiring groove the full height of the contact hole and said second portion defines a substantially vertical sidewall that extends in a widthwise direction of the first wiring groove the full height of the contact hole.