Patent ID: 8282997

Claim:
A method of producing a coating on a support or a glass surface, comprising depositing a first metal oxide or metal oxynitride as a thin layer on the support or glass surface, subjecting the thin layer to plasma etching or plasma-activated etching to roughen the surface of the thin layer, applying a second coating to the roughened surface, said second coating being capable of adhering to the layer of said first metal oxide, wherein the first metal oxide or metal oxynitride is deposited with at least a second metal oxide or metal oxynitride, the second metal oxide or metal oxynitride being distributed within the deposited layer, and wherein the etching removes less of the second metal oxide or metal oxynitride than first metal oxide or metal oxynitride to form, after etching, on the surface, irregular raised features comprising at least a second metal oxide or metal oxynitride, wherein the first metal oxide or metal oxynitride layer comprises SiO x , SiO x C y , SiO x N y , SiO y C y N z , where x, y, z, ≦2; and optionally hydrogen; wherein the second metal oxide or metal oxynitride is formed from a dopant comprised in the first metal oxide or metal oxynitride layer, wherein the dopant is Al, Na, B, Rb, Cs, K, Li, Ba, Sr, Mg, Ca, La, Ti, Zr, an alkali metal, an alkaline-earth metal or a rare earth metal.