Patent ID: 6097052
Filing Date: 2000-08-01
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate having a main surface,a conductive region formed at the main surface of said semiconductor substrate,an insulating film formed on said conductive region, and having a hole reaching to said conductive region, andan interconnection film formed on said insulating film, and connected to said conductive region via said hole,wherein said hole is formed by forming a first hole having a first dimension using photolithography, reducing the first dimension to a second dimension less than the first dimension, and using the first hole with the second dimension to form said hole,wherein said interconnection film comprises first and second portions, comprising stacked first and second layers, respectively, extending in a direction along the upper surface of the insulating film, the first portion extending entirely in contact with the upper surface of the insulating film and in the direction substantially parallel to the upper surface of the insulating film, and the second portion extending above the first portion, and wherein there is a boundary between said first and second portions, said boundary including a silicon oxide film.