发明名称 |
On-site generation of ultra-high-purity buffered-HF and ammonium fluoride |
摘要 |
Provided is a novel method and system for preparing ultra-high-purity buffered-hydrofluoric acid or ammonium fluoride controlled concentration. The method comprises bubbling purified ammonia vapor into ultra-pure hydrofluoric acid. The inventive method and system can be used as an on-site subsystem in a semiconductor device fabrication facility for supplying the buffered-hydrofluoric acid and ammonium fluoride to points of use in the semiconductor device fabrication facility.
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申请公布号 |
US2002079478(A1) |
申请公布日期 |
2002.06.27 |
申请号 |
US20010006353 |
申请日期 |
2001.12.10 |
申请人 |
HOFFMAN JOE G.;CLARK R. SCOT |
发明人 |
HOFFMAN JOE G.;CLARK R. SCOT |
分类号 |
C01B7/07;C01B7/19;C01C1/02;C01C1/16;G05D11/13;H01L21/00;(IPC1-7):C01C1/16;C09K13/08;B01J8/04;B01J10/00 |
主分类号 |
C01B7/07 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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