Invention Grant
- Patent Title: Wafer processing method including applying a polyolefin sheet to a wafer
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Application No.: US16674276Application Date: 2019-11-05
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Publication No.: US11031234B2Publication Date: 2021-06-08
- Inventor: Shigenori Harada , Minoru Matsuzawa , Hayato Kiuchi , Yoshiaki Yodo , Taro Arakawa , Masamitsu Agari , Emiko Kawamura , Yusuke Fujii , Toshiki Miyai , Makiko Ohmae
- Applicant: DISCO CORPORATION
- Applicant Address: JP Tokyo
- Assignee: DISCO CORPORATION
- Current Assignee: DISCO CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Greer, Burns & Crain, Ltd.
- Priority: JPJP2018-208629 20181106
- Main IPC: H01L21/02
- IPC: H01L21/02 ; H01L21/768 ; H01L21/20 ; H01L21/447
Abstract:
A wafer processing method includes a polyolefin sheet providing step of positioning a wafer in an inside opening of a ring frame and providing a polyolefin sheet on a back side of the wafer and on a back side of the ring frame, a uniting step of heating the polyolefin sheet as applying a pressure to the polyolefin sheet to thereby unite the wafer and the ring frame through the polyolefin sheet by thermocompression bonding, a dividing step of applying a laser beam to the wafer to form division grooves in the wafer, thereby dividing the wafer into individual device chips, and a pickup step of blowing air to each device chip through the polyolefin sheet to push up each device chip, thereby picking up each device chip from the polyolefin sheet after performing the dividing step.
Information query
IPC分类:
