Patent ID: 8450219

Claim:
A method of fabricating an Al 2 O 3 thin film layer, comprising steps of: (a) obtaining a silicon wafer in a reaction chamber with nitrogen gas flown in and turning on a power source to heat up to a temperature and stop heating to obtain a native oxide layer of SiO 2 after obtaining heat balance of said silicon wafer, wherein said reaction chamber is a chamber to process atmospheric pressure chemical vapor deposition (APCVD); and wherein said native oxide layer has a thickness of 1˜2 nanometers (nm); (b) flowing a first gas and a second gas into said reaction chamber through an inlet manifold and another inlet manifold, respectively, to grow and obtain an Al 2 O 3 thin film layer on a surface of said silicon wafer after keeping said temperature for a period of time, wherein said Al 2 O 3 thin film layer has a thickness of 80˜120 nm; and (c) cooling down said Al 2 O 3 thin film layer to a room temperature.