发明名称 |
Fluoride gas etching of silicon with improved selectivity |
摘要 |
The etching of a sacrificial silicon portion in a microstructure such as a microelectromechanical structure by the use of etchant gases that are noble gas fluorides or halogen fluorides is performed with greater selectivity toward the silicon portion relative to other portions of the microstructure by the addition of non-etchant gaseous additives to the etchant gas. An additional discovery is that non-etchant gaseous additives that have a molar averaged formula weight that is below that of molecular nitrogen offer significant advantages over gaseous additives of higher formula weights by causing completion of the etch in a shorter period of time while still achieving the same improvement in selectivity. |
申请公布号 |
AU8019000(A) |
申请公布日期 |
2001.05.08 |
申请号 |
AU20000080190 |
申请日期 |
2000.10.13 |
申请人 |
REFLECTIVITY, INC. |
发明人 |
SATYADEV R. PATEL;GREGORY P. SCHAADT;DOUGLAS B. MACDONALD |
分类号 |
H01L21/306;H01L21/308 |
主分类号 |
H01L21/306 |
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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