- 专利标题: Measuring device and method for measuring layer thicknesses and defects in a wafer stack
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申请号: US15053237申请日: 2016-02-25
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公开(公告)号: US10008424B2公开(公告)日: 2018-06-26
- 发明人: Markus Wimplinger
- 申请人: EV Group E. Thallner GmbH
- 申请人地址: AT St. Florian am Inn
- 专利权人: EV Group E. Thallner GmbH
- 当前专利权人: EV Group E. Thallner GmbH
- 当前专利权人地址: AT St. Florian am Inn
- 代理机构: Kusner & Jaffe
- 主分类号: G01N29/00
- IPC分类号: G01N29/00 ; H01L21/66 ; G01B7/06 ; G01B11/06 ; G01B17/02 ; G01N29/04 ; G01N29/265 ; G01N29/27 ; G01N29/275 ; H01L21/67 ; G01N21/95
摘要:
A method for measuring and/or acquiring layer thicknesses and voids of one or more layers of a temporary bonded wafer stack on a plurality of measuring points is provided. A sequence of the method includes an arrangement of a measurement means for measuring and/or acquiring the layer thicknesses and voids of the layers of the wafer stack at the measuring points relative to a flat side of the wafer stack. The sequence further includes an emission of signals in the form of electromagnetic waves by a transmitter of the measurement means, and a receiving the signals which have been reflected by the wafer stack by a receiver of the measurement means. The sequence also includes an evaluation of the signals which have been received by the receiver by an evaluation unit.
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