Method of using NF3 for removing surface deposits
First Claim
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1. A method for removing surface deposits, said method comprising:
- (a) activating in a remote chamber a gas mixture comprising an oxygen source and NF3 using sufficient power for a sufficient time such that said gas mixture reaches a neutral temperature of at least about 3,000 K to form an activated gas mixture, and thereafter (b) contacting said activated gas mixture with the surface deposits and thereby removing at least some of said surface deposits.
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Abstract
The present invention relates to an improved remote plasma cleaning method for removing surface deposits from a surface, such as the interior of a process chamber that is used in fabricating electronic devices. The improvement involves using an activated gas with high neutral temperature of at least about 3000 K, and addition of an oxygen source to the NF3 cleaning gas mixture to improve the etching rate.
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14 Claims
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1. A method for removing surface deposits, said method comprising:
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(a) activating in a remote chamber a gas mixture comprising an oxygen source and NF3 using sufficient power for a sufficient time such that said gas mixture reaches a neutral temperature of at least about 3,000 K to form an activated gas mixture, and thereafter (b) contacting said activated gas mixture with the surface deposits and thereby removing at least some of said surface deposits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification