Patent ID: 6815374
Filing Date: 2004-11-09
Classification: C03C,C23C,H01L

Abstract:
A silicate glass deposition method comprising:forming a plasma surrounding a portion of a substrate in a plasma-enhanced chemical vapor deposition chamber in a first gaseous mixture comprising TEOS, oxygen, and at least one inert carrier gas; depositing a silicate glass base layer on said substrate, said silicate glass base layer having carbonaceous impurities, at least some of said carbonaceous impurities being exposed on an upper surface of said silicate glass base layer; forming a plasma in a second gaseous mixture in said plasma-enhanced chemical vapor deposition chamber, said second gaseous mixture comprising oxygen and hydrogen peroxide to form a second gaseous atmosphere; exposing at least said upper surface of said silicate glass base layer to at least a portion of said plasma in said second gaseous atmosphere in said plasma-enhanced chemical vapor deposition chamber to convert a portion of said carbonaceous impurities in said upper surface of said silicate glass base layer to a gas; removing at least a portion of said second gaseous atmosphere from said plasma-enhanced chemical vapor deposition chamber; preventing said carbonaceous impurities converted to said gas from contacting said silicate glass base layer by removing said carbonaceous impurities from said plasma-enhanced chemical vapor deposition chamber; and depositing a final glass layer on said upper surface of said silicate glass base layer by flowing a third gaseous atmosphere comprising TEOS and ozone into said plasma-enhanced chemical vapor deposition chamber.