Patent ID: 6150720
Filing Date: 2000-11-21
Classification: H01L,Y10S

Abstract:
A semiconductor device comprising:a substrate on which conductive regions of semiconductor material are formed partially;an insulating layer formed on the substrate, in which contact holes are formed so that their bottom openings are applied to the conductive regions;a titanium layer formed along inner surfaces of the contact holes;a first titanium nitride layer formed on the titanium layer in the contact holes;a titanium oxynitride layer formedon the first titanium nitride layer in the contact holes;a second titanium nitride layer formed on the titanium oxynitride layer in the contact holes;buried plugs of a first conductive material formed on the second titanium nitride layer in the contact holes; anda wiring formed on the insulating layer, and electrically connected to the buried plugs, the wiring being made of a second conductive material different than the first conductive material.