Patent ID: 7045070
Filing Date: 2006-05-16
Classification: H01L

Abstract:
1. A method of producing an electrode configuration, which comprises the following steps: forming a first conductive layer of the electrode configuration of a material substantially unetchable by chemical dry-etching, the first conductive layer containing a material selected from the group consisting of a 4d transition metal, a 5d transition metal, a conductive nitride thereof, and a conductive oxide thereof; forming a second conductive layer of the electrode configuration on the first conductive layer from a material etchable by chemical dry-etching, the second conductive layer containing a material selected from the group consisting of aluminum, titanium, tungsten, a conductive silicide thereof, a conductive nitride thereof, and a conductive oxide thereof; structuring the second conductive layer to form a structured second layer; chemical-physical dry etching the first conductive layer while using the structured second layer as a mask; applying at least one insulation layer on the electrode configuration, and structuring the insulation layer to form at least two contact holes with different depths; and subjecting the electrode configuration to overetching during etching of the contact holes having different depths; preventing, by the second conductive layer, breaking through of the electrode configuration and formation of redeposition of the material of the first conductive layer during the overetching.