Patent ID: 6043136
Filing Date: 2000-03-28
Classification: H01L

Abstract:
A method for forming a silicon oxide layer comprising:providing a substrate;forming over the substrate a second silicon oxide layer, the second silicon oxide layer being formed through a second ozone assisted sub-atmospheric pressure thermal chemical vapor deposition (SACVD) method, where the second ozone assisted sub-atmospheric pressure thermal chemical vapor deposition (SACVD) method employs an ozone oxidant and a tetra-ethyl-ortho-silicate (TEOS) silicon source material at a second ozone:TEOS volume ratio of less than about 2:1;forming upon the second silicon oxide layer a first silicon oxide layer, the first silicon oxide layer being formed through a first ozone assisted sub-atmospheric pressure thermal chemical vapor deposition (SACVD) method, the first ozone assisted sub-atmospheric pressure thermal chemical vapor deposition (SACVD) method employing an ozone oxidant and a tetra-ethyl-ortho-silicate (TEOS) silicon source material at a first ozone:TEOS volume ratio of from about 10:1 to about 14:1; andannealing thermally the substrate within an oxygen containing atmosphere at a temperature of greater than about 1100 degrees centigrade to form from the second silicon oxide layer and the first silicon oxide layer a corresponding densified second silicon oxide layer and a corresponding densified first silicon oxide layer.