- 专利标题: System and method for automatically correcting for rotational misalignment of wafers on film frames
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申请号: US14424427申请日: 2013-09-02
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公开(公告)号: US10128140B2公开(公告)日: 2018-11-13
- 发明人: Jing Lin
- 申请人: SEMICONDUCTOR TECHNOLOGIES & INSTRUMENTS PTE LTD
- 申请人地址: SG Singapore
- 专利权人: SEMICONDUCTOR TECHNOLOGIES & INSTRUMENTS PTE LTD
- 当前专利权人: SEMICONDUCTOR TECHNOLOGIES & INSTRUMENTS PTE LTD
- 当前专利权人地址: SG Singapore
- 代理机构: Hauptman Ham, LLP
- 国际申请: PCT/SG2013/000382 WO 20130902
- 国际公布: WO2014/035347 WO 20140306
- 主分类号: H01L21/68
- IPC分类号: H01L21/68 ; G01N21/95 ; G01B11/27 ; H01L21/683 ; B25J11/00 ; B25J15/06 ; H01L21/677 ; H01L21/687 ; H01L21/67
摘要:
Automatically correcting for rotational misalignment of a wafer improperly mounted on a film frame includes capturing an image of portions of the wafer using an image capture device, prior to initiation of a wafer inspection procedure by an inspection system; digitally determining a rotational misalignment angle and a rotational misalignment direction of the wafer relative to the film frame and/or a set of reference axes of a field of view of the image capture device; and correcting for the rotational misalignment of the wafer by way of a film frame handling apparatus separate from the inspection system, which is configured for rotating the film frame across the rotational misalignment angle in a direction opposite to the rotational misalignment direction. Such film frame rotation can occur prior to placement of the film frame on the wafer table, without decreasing film frame handling throughput or inspection process throughput.
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