Patent ID: 7271112
Filing Date: 2007-09-18
Classification: C23C,H01L

Abstract:
1. A method of filling a gap on a semiconductor substrate, the method comprising: (a) providing a semiconductor substrate in a deposition reaction chamber; (b) exposing a substrate surface to a metal-containing precursor gas to form a saturated layer of metal-containing precursor on the substrate surface; (c) exposing the substrate surface to a silicon-containing precursor gas wherein the partial pressure of the silicon-containing precursor gas in step (c) is less than 5 Torr; (d) repeating steps (b) and (c) until the gap width is less than 100 Å; (e) exposing the substrate surface to a metal-containing precursor gas to form a saturated layer of metal-containing precursor on the substrate surface; (f) repeating exposing the substrate surface to the silicon-containing precursor gas, wherein the partial pressure of the silicon-containing precursor gas in the reaction chamber is between about 5 Torr and 200 Torr, and (g) repeating steps (e) and (f) until the gap is substantially filled.