Patent ID: 6803329
Filing Date: 2004-10-12
Classification: H01L

Abstract:
A method for low temperature liquid-phase deposition, comprising steps of:a) adding a solute to an H2SiF6 solution, making said solution a saturated H2SiF6 solution; b) preparing a sample on which a thin film is to be deposited, wherein at least a semiconductor device having independent circuit functions has been fabricated on a surface of said sample; c) adding a reactant to said saturated H2SiF6 solution, making said saturated H2SiF6 solution an over-saturated H2SiF6 solution so as to form a thin film by liquid-phase deposition on said sample: and d) adjusting the concentration of said over-saturated H2SiF6 solution according to a pH-value measured by a pH meter, the adjusting step d) including: d1) removing micro-particles from said over-saturated H2SiF6 solution by filtering: d2) reducing the concentration of SiF4 in said over-saturated H2SiF6 solution by one approach selected from temperature increase and pressure reduction so as to the concentration of reactive ions: and d3) adding said reactant to said over-saturated H2SiF6 according to said pH-value measured by said pH meter.