Patent ID: 7531466

Claim:
A method of making a doped silicon oxide thin film using a doped silicon oxide precursor solution, comprising: mixing a silicon source in an organic acid; adding 2-methoxyethyl ether to the silicon source and organic acid to form a preliminary precursor solution; heating and stirring the preliminary precursor solution; filtering the preliminary precursor solution; dissolving a doping impurity in 2-methoxyethanol to form a doped source solution; mixing the preliminary precursor solution and the doped source solution to form a doped silicon oxide precursor solution; forming a doped silicon oxide thin film on a wafer by spin coating the doped silicon oxide precursor solution onto the wafer; baking the thin film and the wafer at progressively increasing temperatures; and annealing the thin film and the wafer at least once, including a first anneal at a temperature of about 700° C. for about ten minutes in an oxygen atmosphere.