Patent ID: 8132426

Claim:
A method of making a heat treated coated article, the method comprising: having a glass substrate with at least one layer comprising diamond-like carbon (DLC) on the glass substrate and a protective film on the glass substrate over at least the layer comprising DLC, the protective film including a release layer from 100-1,000 Å thick and an oxygen barrier layer, the release layer and the oxygen barrier layer being of different material and/or different stoichiometry relative to each other and the release layer being between at least the layer comprising DLC and the oxygen barrier layer, and wherein the oxygen barrier layer comprises aluminum nitride; heat treating the glass substrate with the layer comprising DLC and the protective film thereon so that during the heat treating the protective film prevents significant burnoff of the layer comprising DLC, wherein the heat treating comprises heating the glass substrate to temperature(s) sufficient for thermal tempering, heat strengthening, and/or heat bending; and exposing the protective film to a release liquid and removing at least part of the protective film during and/or after said heat treating.