Patent ID: 6297175
Filing Date: 2001-10-02
Classification: C03C,C23C,H01L

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