Patent ID: 7358187

Claim:
Coating process for patterned substrate surfaces, comprising the steps of: a) providing a substrate, which has a surface which is patterned in a substrate patterning region and has one or more trenches to be filled to a predetermined filling height; b) introducing a catalyst layer into the trenches that are to be filled in the substrate patterning region; c) depositing catalytically a reaction layer in the trenches that are to be filled in the substrate patterning region; d) densifying the catalytically deposited reaction layer in the trenches that are to be filled, in order to obtain a densified reaction layer; and e) repeating steps b) to d) until the predetermined filling height of the trenches to be filled has been reached, wherein step c) of catalytically depositing the reaction layer in the trenches that are to be filled in the substrate patterning region comprises the substeps of: (i) passing a gaseous precursor over the surface of the trenches which are to be filled and have been coated with the catalyst layer, in such a manner that the precursor reacts as a result of the catalyst layer on the surface, leading to coating of constituents of the precursor; (ii) passing a gaseous coating agent over the surface of the trenches which are to be filled and have coated with the catalyst layer, in such a manner that a reaction layer is catalytically deposited; and (iii) repeating steps (i) and (ii) until the catalytic reactions effected by steps (i) and (ii) have ended.