Patent ID: 6576570
Filing Date: 2003-06-10
Classification: C03C,C23C,H01L

Abstract:
A method of depositing silicate glass on a substrate comprising:placing a substrate within a plasma-enhanced chemical vapor deposition chamber; providing a first gaseous mixture comprising TEOS, oxygen, and at least one inert carrier gas to form a first gaseous atmosphere in said plasma-enhanced chemical vapor deposition chamber; generating a plasma surrounding said substrate in said plasma-enhanced chemical vapor deposition chamber in said 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; providing a second gaseous mixture comprising oxygen and hydrogen peroxide to form a second gaseous atmosphere in said plasma-enhanced chemical vapor deposition chamber; igniting a plasma in said second gaseous atmosphere in said plasma-enhanced chemical vapor deposition chamber; contacting at least said upper surface of said silicate glass base layer with at least a portion of said plasma in said second gaseous atmosphere in said plasma-enhanced chemical vapor deposition chamber comprising oxygen and hydrogen peroxide to convert a portion of said carbonaceous impurities on 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.