Patent ID: 6580091
Filing Date: 2003-06-17
Classification: H01L

Abstract:
A semiconductor device comprising:a substrate having a semiconductor layer; a first impurity diffusion layer including a dopant, which is formed in said semiconductor layer as a part of a semiconductor element; an interlayer insulating film formed on said semiconductor layer; a contact hole passing through said interlayer insulating film, which reaches said first impurity diffusion layer; a second impurity diffusion layer including a dopant having the same conductivity as the dopant of said first impurity diffusion layer, said second impurity diffusion layer configured to allow for optical monitoring thereof so as to provide for monitoring of the physical state of said first impurity diffusion layer during the formation of said contact hole; and an opening passing through said interlayer insulating film which reaches said second impurity diffusion layer and which is formed simultaneously with said contact hole, wherein said second impurity diffusion layer is provided in a region other than a region to be formed with a semiconductor chip including said semiconductor element, and said second impurity diffusion layer has an impurity concentration which is greater than an impurity concentration of said first impurity diffusion layer.