Chemical control features in wafer process equipment
First Claim
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1. A gas distribution assembly, comprising:
- an annular body comprising;
an inner annular wall located at an inner diameter, an outer annular wall located at an outer diameter, an upper surface, and a lower surface;
an upper recess formed in the upper surface;
a lower recess formed in the lower surface;
a first fluid channel defined in the lower surface that is located in the annular body radially inward of the lower recess;
an upper plate coupled with the annular body at the upper recess, wherein the upper plate defines a plurality of first apertures; and
a lower plate coupled with the annular body at the lower recess, and covering the first fluid channel, the lower plate comprising;
a plurality of second apertures defined therein, wherein the second apertures align with the first apertures defined in the upper plate;
a plurality of third apertures defined therein and located between the second apertures;
wherein the upper and lower plates are coupled with one another such that the first and second apertures are aligned to form a channel through the upper and lower plates.
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Abstract
Gas distribution assemblies are described including an annular body, an upper plate, and a lower plate. The upper plate may define a first plurality of apertures, and the lower plate may define a second and third plurality of apertures. The upper and lower plates may be coupled with one another and the annular body such that the first and second apertures produce channels through the gas distribution assemblies, and a volume is defined between the upper and lower plates.
1727 Citations
13 Claims
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1. A gas distribution assembly, comprising:
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an annular body comprising; an inner annular wall located at an inner diameter, an outer annular wall located at an outer diameter, an upper surface, and a lower surface; an upper recess formed in the upper surface; a lower recess formed in the lower surface; a first fluid channel defined in the lower surface that is located in the annular body radially inward of the lower recess; an upper plate coupled with the annular body at the upper recess, wherein the upper plate defines a plurality of first apertures; and a lower plate coupled with the annular body at the lower recess, and covering the first fluid channel, the lower plate comprising; a plurality of second apertures defined therein, wherein the second apertures align with the first apertures defined in the upper plate; a plurality of third apertures defined therein and located between the second apertures; wherein the upper and lower plates are coupled with one another such that the first and second apertures are aligned to form a channel through the upper and lower plates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A gas distribution assembly, comprising:
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an annular body comprising; an inner annular wall located at an inner diameter, an outer annular wall located at an outer diameter, an upper surface, and a lower surface; an upper plate coupled with the annular body, wherein the upper plate defines a plurality of first apertures; an intermediate plate coupled with the upper plate, wherein the intermediate plate defines a plurality of second and third apertures, and wherein the second apertures align with the first apertures of the upper plate; and a lower plate coupled with the annular body and the intermediate plate, comprising; a plurality of fourth apertures defined therein that align with the first apertures of the upper plate and the second apertures of the intermediate plate to form a first set of fluid channels through the plates, a plurality of fifth apertures defined therein that align with the third apertures of the intermediate plate to form a second set of fluid channels through the intermediate and lower plates, wherein the second set of fluid channels are fluidly isolated from the first set of fluid channels, and a plurality of sixth apertures defined therein that form a third set of fluid channels through the lower plate, wherein the third set of fluid channels are fluidly isolated from the first and second set of fluid channels. - View Dependent Claims (11, 12, 13)
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Specification