Heater for processing chamber
First Claim
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1. A purge gas assembly adapted to direct a flow of a gas in a processing system, comprising:
- a deflection member having a lower surface defining a deflection surface adapted to direct the flow of the gas at an angle to a radial line directed from a central axis of the deflection member over the deflection surface; and
an edge ring disposable over at least a portion of an upper surface of the deflection member and comprising an inner annular lip;
wherein the deflection member and the edge ring define a portion of a purge gas passageway.
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Abstract
A gas delivery apparatus and method for directing a flow of gas to the edge of a substrate at an angle to the radial direction of the substrate is provided. The apparatus directs the gas from a gas opening, over a plurality of grooves that are angled relative to a radial line originating at a center of the gas delivery apparatus. Subsequently, the gas is flowed over a portion of the substrate to prevent reactive gases from depositing on selective portions of the substrate.
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Citations
28 Claims
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1. A purge gas assembly adapted to direct a flow of a gas in a processing system, comprising:
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a deflection member having a lower surface defining a deflection surface adapted to direct the flow of the gas at an angle to a radial line directed from a central axis of the deflection member over the deflection surface; and
an edge ring disposable over at least a portion of an upper surface of the deflection member and comprising an inner annular lip;
wherein the deflection member and the edge ring define a portion of a purge gas passageway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
a first portion having a sloped surface disposed between a top surface and the annular lip; and
a second portion coupled to a lower surface of the first portion and disposed in facing relation to the deflection member.
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6. The apparatus of claim 5, wherein the lower surface of the first portion and an upper surface of the second portion define one or more spaces therebetween.
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7. The apparatus of claim 5, wherein the first portion and the second portion of the edge ring are coupled by fasteners.
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8. The apparatus of claim 1, wherein the deflection surface comprises one or more of fluid grooves formed at least partially therein.
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9. The apparatus of claim 8, wherein the one or more grooves extend outwardly from an inner diameter of the deflection member at an angle to a radial line originating at a center axis of the deflection member.
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10. The apparatus of claim 9, wherein the angle is between about 60 and 75 degrees.
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11. The apparatus of claim 1, wherein the edge ring comprises an annular upper portion which forms a portion of a purge gas exhaust passageway and wherein the edge ring further comprises ports to vent the purge gas exhaust passageway.
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12. The apparatus of claim 11, wherein a diametrically interior portion of the annular lip is disposable at a height substantially equal to the edge of the substrate.
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13. An apparatus for processing a substrate, comprising:
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a support member having a substrate receiving surface;
a shoulder portion of the support member disposed outwardly of the substrate receiving surface and having a gas delivery groove formed therein;
a deflection member positioned on the shoulder portion to define an interface between a surface of the deflection member and a surface of the shoulder portion;
a deflection surface disposed at the interface and formed on at least one of the deflection member and the shoulder portion and wherein the deflection surface is adapted to cause a tangential flow of gas over the deflection surface; and
an edge ring at least partially disposed over the deflection member. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method for delivering a gas to a substrate supported on an upper surface of a support member in a process chamber, comprising:
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a) providing a gas delivery assembly disposed on a shoulder of the support member, the gas delivery assembly comprises a deflection member and an edge ring having at least a portion disposed over the deflection member;
b) flowing a gas into a gas delivery channel formed in the support member;
c) flowing the gas over a deflection surface disposed on one or more of the deflection member and the shoulder to provide a tangential component to a direction of gas flow; and
thend) flowing at least a portion of the gas into an annular opening formed between the gas delivery assembly and the shoulder of the support member. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification