Patent ID: 6555465
Filing Date: 2003-04-29
Classification: H01L

Abstract:
A multi-layer forming method comprising the steps of:forming an Al or Al alloy layer on a first insulating film covering a substrate; forming a first Ti layer on the Al or Al alloy layer; sequentially laminating a first TiN layer and a first TiON layer in this order on the first Ti layer through reactive sputtering; patterning a lamination of the Al or Al alloy layer, the first Ti layer, the first TiN layer, and the first TiON layer into a desired wiring pattern to form a first wiring layer; forming a second insulating film on the first insulating film, the second insulating film covering the first wiring layer; forming a contact hole through the second insulating film, the contact hole reaching a partial surface area of the first TiON layer; forming a tight adhesion layer covering an inner surface of the contact hole; forming a conductive plug embedding an inside of the contact hole, with the tight adhesion layer being interposed under the conductive plug; and forming a second wiring layer on the second insulating film, the second wiring layer being connected to the plug.