Patent ID: 8241708

Claim:
A method for forming an insulating oxide material in an opening within a silicon substrate in a semiconductor structure, comprising: forming a supercritical carbon dioxide solution by combining supercritical carbon Dioxide, a Lewis base that is soluble in the supercritical carbon dioxide, and an acid that is substantially insoluble in the supercritical carbon dioxide such that the Lewis base and the acid form a complex that is soluble in the supercritical carbon dioxide; combining the supercritical carbon dioxide solution with a hydrolysable alkoxide; and depositing the supercritical carbon dioxide/hydrolysable alkoxide solution into the opening and reacting the solution with water such that the alkoxide is hydrolyzed and a fill material is deposited to fill the opening, the fill material consisting essentially of the insulating oxide material, wherein the insulating oxide material is on and in contact with the silicon substrate within the opening.