Patent ID: 7501353
Filing Date: 2009-03-10
Classification: H01L

Abstract:
1. A method for the formation of features in a damascene process, the method comprising the steps of: (a) providing a semiconductor wafer having a dielectric layer thereon; (b) forming vias in the dielectric layer; (c) applying a layer of high molecular weight polymer over the dielectric layer, the high molecular weight layer covering the vias but not entering the vias; (d) applying a photoresist material to the high molecular weight layer; (e) patterning the photoresist material so as to expose openings over portions of the high molecular weight layer; (f) etching the high molecular weight layer and dielectric layer through the openings to form a trench; and (g) removing the remaining photoresist and high molecular weight layer from the dielectric material to form dual damascene openings in the dielectric material.