Patent ID: 7521715
Filing Date: 2009-04-21
Classification: H01L,Y10S

Abstract:
1. An interconnection structure in a semiconductor device, comprising: an insulating layer including a contact hole extending therethrough on an active region of a semiconductor substrate; a conductive layer pattern on the insulating layer; and a multi-layer plug vertically extending completely through the contact hole in the insulating layer to electrically connect the conductive layer pattern and the active region, the multi-layer plug comprising a semiconductor plug directly on the active region and extending through at least a portion of the insulating layer, and a metal plug directly on the semiconductor plug and the conductive layer pattern and extending through at least a portion of the insulating layer, wherein the metal plug is directly on the active region and at least one sidewall of the semiconductor plug, and wherein the multi-layer plug does not extend directly on the insulating layer outside the contact hole.