发明授权
- 专利标题: Laser processing method and object to be processed
- 专利标题(中): 激光加工方法和待处理对象
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申请号: US10594892申请日: 2005-03-02
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公开(公告)号: US07592237B2公开(公告)日: 2009-09-22
- 发明人: Takeshi Sakamoto , Kenichi Muramatsu
- 申请人: Takeshi Sakamoto , Kenichi Muramatsu
- 申请人地址: JP Hamamatsu-shi, Shizuoka
- 专利权人: Hamamatsu Photonics K.K.
- 当前专利权人: Hamamatsu Photonics K.K.
- 当前专利权人地址: JP Hamamatsu-shi, Shizuoka
- 代理机构: Drinker Biddle & Reath LLP
- 优先权: JP2004-100516 20040330
- 国际申请: PCT/JP2005/003515 WO 20050302
- 国际公布: WO2005/098914 WO 20051020
- 主分类号: H01L21/301
- IPC分类号: H01L21/301 ; H01L21/46 ; H01L21/78
摘要:
A laser processing method is provided, which, when cutting a substrate formed with a laminate part including a plurality of functional devices into a plurality of chips, each chip including at least one of the functional devices, can cut the laminate part with a high precision together with the substrate.In this laser processing method, modified regions differing from each other in terms of easiness to cause the substrate 4 to fracture are formed along respective lines to cut 5a to 5d. Therefore, when an expandable tape is attached to the rear face of a substrate 4 and expanded, an object to be processed 1 is cut stepwise into a plurality of chips. Such stepwise cutting allows uniform tensile stresses to act on respective parts extending along the lines to cut 5a to 5d, whereby interlayer insulating films on the lines to cut 5a to 5d are cut with a high precision together with the substrate 4.
公开/授权文献
- US20070287267A1 Laser Processing Method and Object to be Processed 公开/授权日:2007-12-13