Semiconductor device and method of manufacturing the same

Abstract

A method of manufacturing a semiconductor device comprising the following steps: forming first, second, and third wiring layers on a semiconductor substrate; forming first, second, and third cover dielectric layers for covering these wiring layers; forming a first impurity diffusion layer of a P type and a second impurity diffusion layer of an N type in an active region, and forming a third impurity diffusion layer of a P type and a fourth impurity diffusion layer of an N type in an active region; self-alignably forming a first local wiring layer for connecting the first impurity diffusion layer with the second wiring layer, and self-alignably forming a second local wiring layer for connecting the fourth impurity diffusion layer with the third wiring layer; in an interlayer dielectric layer, self-alignably forming a first contact hole by using the first and third cover dielectric layers as masking layers, and self-alignably forming a second contact hole by using the second cover dielectric layer as a masking layer; and forming fourth and fifth wiring layers in these contact holes, respectively.