发明名称 |
METHOD OF DETECTING EXTRANEOUS MATTER ON HEAT PROCESSING PLATE, HEAT PROCESSING APPARATUS, PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM WITH PROGRAM RECORDED THEREON |
摘要 |
In the present invention, a heating plate is divided into a plurality of regions. Integrated values of temperature fluctuations in each of the regions when a substrate is mounted on the heating plate in a normal state without extraneous matter are collected. A Mahalanobis reference space in the discriminant analysis method is formed based on the integrated values at normal time. During actual heat processing, an integrated value of temperature fluctuation of each of the regions when the substrate is mounted on the heating plate is then detected, so that a Mahalanobis distance about the integrated value during the processing is calculated based on the integrated value during the processing and the Mahalanobis reference space obtained in advance. Whether or not there is extraneous matter on the heating plate is determined by comparing the calculated Mahalanobis distance to a predetermined threshold value.
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申请公布号 |
US2009076763(A1) |
申请公布日期 |
2009.03.19 |
申请号 |
US20050719189 |
申请日期 |
2005.11.08 |
申请人 |
TOKYO ELECTRON LIMITED |
发明人 |
OKAMURA KOUJI;TOMITA HIROSHI;IWANAGA SHUJI;ARAKI SHINICHIRO |
分类号 |
G01N25/00;G06F15/00;H01L21/027 |
主分类号 |
G01N25/00 |
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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