Patent ID: 6989577
Filing Date: 2006-01-24
Classification: H01L

Abstract:
1. A semiconductor device comprising: a multiple insulation layer structure in which multiple insulation layers each having interconnection layers are built up and one or another of the interconnection layers forms a fuse that is blown in order to select a spare cell to relieve a defective cell; a first protective insulation film provided on said multiple insulation layer structure; a second protective insulation film provided on said first protective insulation film; and an opening corresponding to said fuse, provided in said multiple insulation layers disposed above the interconnection layer which includes said fuse, in said first protective insulation film and in said second protective insulation film, wherein a side wall corresponding to said opening of said first protective insulation film and a side wall corresponding to said opening of said second protective insulation film are continuous at the boundary thereof and the side wall of said first protective insulation film and a side wall corresponding to said opening of the insulation layers are discontinuous at the boundary thereof, and wherein a thin insulation film is inserted between said first protective insulation film and said multiple layer insulation structure.