Patent ID: 6297532
Filing Date: 2001-10-02
Classification: H01L

Abstract:
A semiconductor device, comprising:a semiconductor substrate having a main surface;a first conductive layer extending entirely above the main surface of the semiconductor substrate;a second conductive layer extending entirely above the main surface of the semiconductor substrate, which second conductive layer is different from said first conductive layer, said first and second conductive layers being structurally situated at the same level with respect to the main surface of the semiconductor substrate, wherein said second conductive layer comprises a sidewall and said first conductive layer continuously surrounds the sidewall of the second conductive layer;an insulating layer formed on said first and second conductive layers, said insulating layer having an upper surface and a hole therethrough from the upper surface to a surface of said second conductive layer; anda third conductive layer formed on said insulating layer in direct contact with said second conductive layer through said hole and spaced apart from said first conductive layer with said insulating layer therebetween; wherein,a thickness of said insulating layer at a region surrounding said hole from the upper surface of the insulating layer to the surface of the second conductive layer is less than a thickness of insulating material separating said first and third conductive layers from each other.