Patent ID: 6300683
Filing Date: 2001-10-09
Classification: H01L

Abstract:
A semiconductor device comprising:(a) a semiconductor region;(b) a main electrode region provided in the semiconductor region;(c) an interlayer insulating film provided on the semiconductor region;(d) an interconnection having a uniform width provided on top of the interlayer insulating film;(e) a deformed trumpet-shaped contact plug for connecting the main electrode region with the interconnection, the contact plug has first and second tapered sidewalls obliquely intersecting with a bottom surface of the interconnection, the first and second tapered sidewalls having different orientations as to a center axis of the contact plug, the shape of a top end face of the contact plug at which the contact plug connects with the interconnection being anisotropically deformed in relation to the center axis of the contact plug so that a length of the top end face measured along a direction of the interconnection increases compared with a shorter length measured perpendicular to the direction of the interconnection, wherein the first and second tapered sidewalls have different intersecting angles with the top end surface such that the shorter length substantially conform with the uniform width of the interconnection.