Patent ID: 6030900
Filing Date: 2000-02-29
Classification: C23C,H01L

Abstract:
A method for the production of a spacer in a structure, the method comprising the following steps:anisotropic dry etching of the structure so that a bottom surface is formed and at least one sidewall surface extends from the bottom surface through a top of the structure, the bottom surface having at least one modification that gives the bottom surface at least one surface characteristic that is different from a corresponding surface characteristic of the sidewall surface, the bottom and sidewall surfaces carrying etching residues;cleaning the etching residues from bottom and sidewall surfaces; andexposing the bottom surface and sidewall surface to form silicon dioxide with an organic silicon precursor and ozone at a pressure ranging from about 0.2 bar to about 1 bar at a temperature ranging from about 200.degree. C. to about 400.degree. C. whereby, silicon dioxide is deposited onto the sidewall surface but not on the bottom surface due to the different surface characteristic of the bottom surface.