Patent ID: 6555470
Filing Date: 2003-04-29
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device where a first layer of silicon oxide is deposite on a surface of a silicon body and is provided with contact windows within which semiconductor zones formed in the semiconductor body and conductor tracks of non-crystalline silicon formed on the surface are exposed, while on said first layer of silicon oxide a first metallization layer is formed which makes contact in the contact windows with the active semiconductor zones and with the conductor tracks of non-crystalline silicon and which is covered with a second layer of silicon oxide which is provided with contact windows within which the first metallization layer is exposed, whereupon consecutively an adhesion layer is deposited on the second layer of silicon oxide and in the contact windows formed therein, the contact windows are filled with tungsten plugs, and a second metallization layer is formed on the layer of insulating material so as to make contact with the tungsten plugs formed in the contact windows, wherein the first metallization layer is formed in a tungsten layer, while a layer of titanium nitride is deposited as the adhesion layer on the second layer of silicon oxide and in the contact windows formed therein.