Reactor for depositing thin film on wafer
First Claim
1. A thin film deposition reactor comprising:
- a reactor block on which a wafer is placed;
a shower head plate for uniformly maintaining a predetermined pressure by covering the reactor block;
a wafer block installed in the reactor block, on which the wafer is to be seated;
an exhausting portion connected to the reactor block for exhausting a gas from the reactor block;
a first connection line in communication with the shower head plate for supplying a first reaction gas and an inert gas;
a second connection line in communication with the shower head plate for supplying a second reaction gas and the inert gas;
a diffusion plate mounted on a lower surface of the shower head plate, the diffusion plate having a plurality of spray holes which is in communication with the first connection line and face the upper surface of the wafer to spray the first reaction gas and the inert gas onto the wafer, and a plurality of nozzles which is in communication with a passage radially formed from the second connection line and extend toward the inner side surface of the reactor block to spray the second reaction gas and the inert gas toward edges of the wafer, whereby the first and second reaction gases are applied on the wafer without mixing each other; and
a second mixing portion between the second connection line and the shower head plate for mixing the second reaction gas and the inert gas supplied from the second connection line and diffusing the mixture to the nozzles through the passage, the second mixing portion having an auxiliary diffusion plate in which holes are formed.
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Accused Products
Abstract
A thin film deposition reactor including a reactor block on which a wafer is placed, a shower head plate for uniformly maintaining a predetermined pressure by covering the reactor block, a wafer block installed in the reactor block, on which the wafer is to be seated; an exhausting portion connected to the reactor block for exhausting a gas from the reactor block; a first connection line in communication with the shower head plate, through which a first reaction gas and/or inert gas flow, a second connection line in communication with the shower head plate, through which a second reaction gas and/or inert gas flow, and a diffusion plate mounted on a lower surface of the shower head plate. The diffusion plate has a plurality of spray holes which are in communication with the first connection line and face the upper surface of the wafer to spray the first reaction gas and/or inert gas onto the wafer, and a plurality of nozzles which are in communication with the second connection line and extend toward the inner side surface of the reactor block to spray the second reaction gas and/or inert gas toward edges of the wafer.
50 Citations
18 Claims
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1. A thin film deposition reactor comprising:
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a reactor block on which a wafer is placed;
a shower head plate for uniformly maintaining a predetermined pressure by covering the reactor block;
a wafer block installed in the reactor block, on which the wafer is to be seated;
an exhausting portion connected to the reactor block for exhausting a gas from the reactor block;
a first connection line in communication with the shower head plate for supplying a first reaction gas and an inert gas;
a second connection line in communication with the shower head plate for supplying a second reaction gas and the inert gas;
a diffusion plate mounted on a lower surface of the shower head plate, the diffusion plate having a plurality of spray holes which is in communication with the first connection line and face the upper surface of the wafer to spray the first reaction gas and the inert gas onto the wafer, and a plurality of nozzles which is in communication with a passage radially formed from the second connection line and extend toward the inner side surface of the reactor block to spray the second reaction gas and the inert gas toward edges of the wafer, whereby the first and second reaction gases are applied on the wafer without mixing each other; and
a second mixing portion between the second connection line and the shower head plate for mixing the second reaction gas and the inert gas supplied from the second connection line and diffusing the mixture to the nozzles through the passage, the second mixing portion having an auxiliary diffusion plate in which holes are formed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 16)
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- 9. The thin film deposition of claim 9, wherein the diffusion plate has a thickness of at least 5 mm to prevent the diffusion plate from being bent at a high temperature.
- 17. The thin film deposition reactor of claim 17, wherein the interval between the center of the diffusion plate and the wafer block is larger than the interval between the edges of the diffusion plate and the wafer block to adjust a thickness, purity and electrical characteristics of a deposited thin film.
Specification