Patent ID: 7608519
Filing Date: 2009-10-27
Classification: C23C,H01L

Abstract:
1. A method of fabricating a trench isolation structure of a semiconductor device, comprising: providing a substrate with a trench formed therein; forming an oxide film on side wall and bottom surfaces of the trench; forming a nitride liner on the oxide film on the side wall and bottom surfaces of the trench, and on top surfaces of the substrate; loading the substrate into a high-density plasma (HDP) chemical vapor deposition apparatus; primarily heating the substrate; applying a first bias power to the apparatus so as to form an HDP oxide liner on an entire surface of the nitride liner, a gap remaining in the trench following formation of the HDP oxide liner; removing the application of the first bias power and secondarily heating the substrate; applying a second bias power at a power level that is greater than that of the first bias power to the substrate so as to form an HDP oxide film to fill the gap in the trench; and unloading the substrate from the apparatus.