发明名称 |
Method and apparatus for optical emission end point detection in plasma etching processes. |
摘要 |
<p>The device monitors the optical emission intensity of the plasma in a narrow band centred about a predetermined spectral line. It generates a first signal indicative of the spectral intensity of the etch product series. The device further monitors the optical emission intensity of the plasma in a wide band and generates a second signal indicative of the spectral intensity of the continuum plasma emission. The device further monitors the magnitudes of the first and second signals and generates a termination signal when the magnitudes diverge.</p> |
申请公布号 |
EP0604344(A1) |
申请公布日期 |
1994.06.29 |
申请号 |
EP19930480195 |
申请日期 |
1993.11.19 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
O'NEILL, JAMES ANTHONY;PASSOW, MICHAEL LANE;SINGH, JYOTHI |
分类号 |
H01L21/302;G01J3/00;G01J3/443;H01J37/32;H01L21/3065;H05H1/00;H05H1/46;(IPC1-7):H01J37/32 |
主分类号 |
H01L21/302 |
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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