Patent ID: 9469900
Filing Date: 2016-10-18
CPC Classification: C23C,H01L

Claim Text:
1. A method of chemical vapor deposition (CVD) with a showerhead through which a reactive gas of at least one kind and a purge gas are injected over a substrate located in a reaction chamber to deposit a film on the substrate, comprising the steps of: disposing the showerhead in such a way that the bottom surface of the showerhead is spaced apart from the substrate by a predetermined distance; supplying a reactive gas and an injection support gas into the showerhead, wherein reactive gases of different kinds are respectively delivered into compartments formed at inside of the showerhead in such a way that each reactive gas is mixed with each injection support gas in each mixing zone at inside of the showerhead, mixing each reactive gas with its corresponding injection support gas in each mixing zone at inside of the showerhead; supplying a purge gas into a separated compartment formed at inside of the showerhead; and injecting the reactive gas mixed with the injection support gas and the purge gas through a plurality of reactive gas exits and a plurality of purge gas exits formed at the bottom surface of the showerhead, respectively.