Patent ID: 8336487

Claim:
A film forming apparatus for forming a metal oxide layer with respect to objects to be processed, the film forming apparatus comprising: a vertically cylindrical processing vessel which can be maintained vacuum; a supporting unit which supports the objects to be processed within the processing vessel; a heating unit which is formed to surround the outer surface of the processing vessel; a zirconium source supplying unit which supplies a zirconium source to the processing vessel; a silicon source supplying unit which supplies a silicon source to the processing vessel; an oxidizer supplying unit which supplies an oxidizer to the processing vessel; and a control unit which controls the zirconium source supplying unit, the silicon source supplying unit, and the oxidizer supplying unit, wherein the control unit controls the film forming apparatus: to insert the objects to be processed into a processing vessel, which can be maintained vacuum, to make the processing vessel vacuum; to perform a sequence of forming a ZrO 2 film on a substrate by alternately supplying the zirconium source and an oxidizer to the processing vessel a plurality of times and to perform a sequence of forming a SiO 2 film on the substrate by alternately supplying the silicon source and the oxidizer to the processing vessel one or more times, wherein the number of times of performances of each of the sequences is adjusted such that Si concentration of the films is from about 1 atm % to about 4 atm %; and to perform the film forming sequences for one or more cycles, wherein one cycle indicates that each of the ZrO 2 film forming sequences and the SiO 2 film forming sequences are repeated the adjusted number of times of performances.