Patent ID: 7335585

Claim:
A method for manufacturing a semiconductor device, the method comprising the steps of: forming a bottom anti-reflective coating in a via hole in an interlayer dielectric sufficiently to fill the via hole, said via hole exposing the semiconductor substrate and heating said bottom anti-reflective coating sufficiently to prevent a formation of voids in the bottom anti-reflective coating, wherein the bottom antireflective coating comprises a cross-linkable resin, a chromophore, a cross-linking agent and an organic solvent; heating said bottom anti-reflective coating sufficiently to prevent a formation of voids in the bottom anti-reflective coating; disposing an acid diffusion material on the heated bottom anti-reflective coating, wherein the acid diffusion material comprises from 1 to about 60 wt % of a hydrophilic polymer, from 1 to about 20 wt % of an acid, and from 1 to about 99 wt % of said solvent; after the step of heating said bottom anti-reflective coating, and separately from the step of heating said bottom anti-reflective coating, heating the heated bottom anti-reflective coating and said acid diffusion material to form a cross-link layer between the heated bottom anti-reflective coating and said acid diffusion material; removing the acid diffusion material that remains on the cross-link layer; and etching the cross-link layer, the bottom anti-reflective coating and the interlayer dielectric sufficiently to form a trench extending from an upper portion of the via hole.