Invention Grant
- Patent Title: High-throughput dry etching of films containing silicon-oxygen components or silicon-nitrogen components by proton-mediated catalyst formation
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Application No.: US17515133Application Date: 2021-10-29
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Publication No.: US11804380B2Publication Date: 2023-10-31
- Inventor: Du Zhang , Yu-Hao Tsai , Mingmei Wang
- Applicant: Tokyo Electron Limited
- Applicant Address: JP Tokyo
- Assignee: Tokyo Electron Limited
- Current Assignee: Tokyo Electron Limited
- Current Assignee Address: JP Tokyo
- Main IPC: H01L21/311
- IPC: H01L21/311

Abstract:
A method of high-throughput dry etching of a film by proton-mediated catalyst formation. The method includes providing a substrate having a film thereon containing silicon-oxygen components, silicon-nitrogen components, or both, introducing an etching gas in the process chamber, plasma-exciting the etching gas, and exposing the film to the plasma-excited etching gas to etch the film. In one example, the etching gas contains at least three different gases that include a fluorine-containing gas, a hydrogen-containing gas, and a nitrogen-containing gas, plasma-exciting the etching gas. In another example, the etching gas contains at least four different gases that include a fluorine-containing gas, a hydrogen-containing gas, an oxygen-containing gas, and a silicon-containing gas.
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