Processing system and method for treating a substrate
First Claim
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1. A method for achieving a trim amount of a feature on a substrate in a chemical oxide removal process comprising:
- setting a process recipe for said chemical oxide removal process, wherein said setting said process recipe comprises setting an amount of a first process gas, and setting an amount of a second process gas;
adjusting said process recipe for said chemical oxide removal process in order to achieve said trim amount by setting an amount of an inert gas;
chemically treating said feature on said substrate by exposing said substrate using said process recipe; and
substantially removing said trim amount from said feature.
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Abstract
A method and system for trimming a feature on a substrate is described. During a chemical treatment of the substrate, the substrate is exposed to a gaseous chemistry, such as HF/NH3, under controlled conditions including surface temperature and gas pressure. An inert gas is also introduced, and the flow rate of the inert gas is selected in order to affect a target trim amount during the trimming of the feature.
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Citations
30 Claims
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1. A method for achieving a trim amount of a feature on a substrate in a chemical oxide removal process comprising:
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setting a process recipe for said chemical oxide removal process, wherein said setting said process recipe comprises setting an amount of a first process gas, and setting an amount of a second process gas;
adjusting said process recipe for said chemical oxide removal process in order to achieve said trim amount by setting an amount of an inert gas;
chemically treating said feature on said substrate by exposing said substrate using said process recipe; and
substantially removing said trim amount from said feature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for trimming a feature on a substrate using a chemical oxide removal process comprising:
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determining a relationship between a trim amount of said feature and an amount of an inert gas, wherein said relationship is established for an amount of a first process gas, and an amount of a second process gas;
selecting a target trim amount;
selecting a target amount of inert gas for achieving said target trim amount using said relationship;
chemically treating said feature on said substrate by exposing said substrate to said amount of said first process gas, said amount of said second process gas, and said target amount of said inert gas; and
substantially removing said target trim amount from said feature. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for achieving a trim amount of a silicon oxide feature on a substrate in a chemical oxide removal process comprising:
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setting a process recipe for said chemical oxide removal process, wherein said setting said process recipe comprises setting an amount of HF, and setting an amount of NH3;
adjusting said process recipe for said chemical oxide removal process in order to achieve said trim amount by setting an amount of argon;
chemically treating said feature on said substrate by exposing said substrate using said process recipe, wherein said amount of HF is introduced independently from said amount of said NH3, and said amount of argon is introduced with said amount of NH3; and
substantially removing said trim amount from said feature, wherein increasing said amount of argon corresponds to decreasing said trim amount.
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30. A system for achieving a trim amount on a substrate in a chemical oxide removal process comprising:
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a chemical treatment system for altering exposed surface layers on said substrate by exposing said substrate to an amount of a first process gas, an amount of a second process gas, and an amount of an inert gas;
a thermal treatment system for thermally treating said chemically altered surface layers on said substrate; and
a controller coupled to said chemical treatment system and configured to adjust said amount of said inert gas in order to achieve said trim amount.
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Specification