Patent ID: 8138097
Filing Date: 2012-03-20
Classification: H01L

Abstract:
1. A method for fabricating a device, comprising: forming a structure on a substrate, the structure having a lower dielectric layer on the substrate, a metal layer on the lower dielectric layer, an upper dielectric layer on the metal layer, a planarizing layer on the upper dielectric layer, and a layer of photoresist material on the planarizing layer; developing the photoresist material according to a mask pattern; etching the planarizing layer and the upper dielectric layer according to the mask pattern; removing the photoresist material and the planarizing layer upon etching of the planarizing layer and the upper dielectric layer; applying a selective metal growth to respective exposed portions of the metal layer following etching of the upper dielectric layer, thereby obtaining an inverted mask pattern composed of the selective metal growth; and etching at least the metal layer and the lower dielectric layer according to the inverted mask pattern.