Gas showerhead, method for making the same and thin film growth reactor
First Claim
1. A gas showerhead, for isolatedly feeding at least a first reactant gas and a second reactant gas into a reaction chamber, comprising:
- a gas distribution and diffusion plate, comprising a plurality of rows of first gas diffusion passages connecting to a first reactant gas source and a plurality of rows of second gas diffusion passages connecting to a second reactant gas source, the plurality of rows of the first gas diffusion passages and the plurality of rows of the second gas diffusion passages are arranged alternately; and
a water cooling plate, located below the gas distribution and diffusion plate, comprising a cooling liquid passage comprising a plurality of columns of cooling liquid passages, a plurality of first gas outlet passages provided for a reactant gas in the first gas diffusion passages to flow out, a plurality of second gas outlet passages provided for a reactant gas in the second gas diffusion passages to flow out, and the plurality of first gas outlet passages are arranged alternately with the plurality of second gas outlet passages;
wherein the gas distribution and diffusion plate and the water cooling plate are two separated components and are assembled integrally in a detachable mechanical manner, and the first reactant gas and the second reactant gas are isolated from each other before exiting the gas showerhead and entering the reaction chamber;
wherein the gas distribution and diffusion plate comprises an upper plate and a lower plate, the first gas diffusion passages comprise a plurality of first conduits extending through the upper plate and the lower plate, wherein the second gas diffusion passages comprise a plurality of second conduits extending through the lower plate, and wherein an upper opening of each of the second conduits is lower than a bottom surface of the upper plate but is higher than an upper surface of the lower plate;
wherein the water cooling plate comprises flat upper surfaces and flat lower surfaces, each of the plurality of first gas outlet passages and the plurality of second gas outlet passages comprises a continuous longitudinal groove extending through the flat upper surfaces and the flat lower surfaces of the water cooling plate, and a column of the plurality of columns of cooling liquid passages is disposed between each of the plurality of first gas outlet passages alternately arranged with each of the plurality of second gas outlet passages; and
wherein a cross section of each of the plurality of first conduits and the plurality of second conduits in a horizontal direction is circular and opens to one of the continuous longitudinal grooves of the plurality of first gas outlet passages and the plurality of second gas outlet passages such that reactant gas is conveyed first through first and second conduits and then diffused and distributed via the continuous longitudinal grooves.
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Accused Products
Abstract
The present application provides a gas showerhead including a gas distribution and diffusion plate and a water cooling plate, the gas distribution and diffusion plate includes several columns of first gas diffusion passages connecting to a first reactant gas source and several columns of second gas diffusion passages connecting to a second reactant gas source; the water cooling plate having cooling liquid passages is arranged below the gas distribution and diffusion plate, and the water cooling plate is provided with first gas outlet passages provided for the reactant gas in the first gas diffusion passages to flow out and second gas outlet passages provided for the reactant gas in the second gas diffusion passages to flow out, so as to isolatedly feed at least two reactant gases into a reaction chamber.
64 Citations
9 Claims
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1. A gas showerhead, for isolatedly feeding at least a first reactant gas and a second reactant gas into a reaction chamber, comprising:
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a gas distribution and diffusion plate, comprising a plurality of rows of first gas diffusion passages connecting to a first reactant gas source and a plurality of rows of second gas diffusion passages connecting to a second reactant gas source, the plurality of rows of the first gas diffusion passages and the plurality of rows of the second gas diffusion passages are arranged alternately; and a water cooling plate, located below the gas distribution and diffusion plate, comprising a cooling liquid passage comprising a plurality of columns of cooling liquid passages, a plurality of first gas outlet passages provided for a reactant gas in the first gas diffusion passages to flow out, a plurality of second gas outlet passages provided for a reactant gas in the second gas diffusion passages to flow out, and the plurality of first gas outlet passages are arranged alternately with the plurality of second gas outlet passages; wherein the gas distribution and diffusion plate and the water cooling plate are two separated components and are assembled integrally in a detachable mechanical manner, and the first reactant gas and the second reactant gas are isolated from each other before exiting the gas showerhead and entering the reaction chamber; wherein the gas distribution and diffusion plate comprises an upper plate and a lower plate, the first gas diffusion passages comprise a plurality of first conduits extending through the upper plate and the lower plate, wherein the second gas diffusion passages comprise a plurality of second conduits extending through the lower plate, and wherein an upper opening of each of the second conduits is lower than a bottom surface of the upper plate but is higher than an upper surface of the lower plate; wherein the water cooling plate comprises flat upper surfaces and flat lower surfaces, each of the plurality of first gas outlet passages and the plurality of second gas outlet passages comprises a continuous longitudinal groove extending through the flat upper surfaces and the flat lower surfaces of the water cooling plate, and a column of the plurality of columns of cooling liquid passages is disposed between each of the plurality of first gas outlet passages alternately arranged with each of the plurality of second gas outlet passages; and wherein a cross section of each of the plurality of first conduits and the plurality of second conduits in a horizontal direction is circular and opens to one of the continuous longitudinal grooves of the plurality of first gas outlet passages and the plurality of second gas outlet passages such that reactant gas is conveyed first through first and second conduits and then diffused and distributed via the continuous longitudinal grooves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification