Patent ID: 6743726
Filing Date: 2004-06-01
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device, comprising:providing a substrate; providing a dielectric layer over the substrate; depositing a layer of anti-reflective coating over the dielectric layer; providing a layer of photoresist over the layer of anti-reflective coating; patterning and defining the photoresist layer to provide a plurality of photoresist structures, wherein at least two adjacent photoresist structures provide a first distance; anisotropically etching the layer of anti-reflective coating unmasked by the photoresist structures to remove only a portion of the anti-reflective coating layer; etching the anti-reflective coating to completely remove the layer of anti-reflective coating unmasked by the photoresist structures; and etching the dielectric layer to form at least one trench between the at least two adjacent photoresist structures, wherein the first distance is substantially equal to a second distance defining an opening at the top of the trench.