Semiconductor device manufacturing: process – Bonding of plural semiconductor substrates – Subsequent separation into plural bodies
Reexamination Certificate
2007-05-15
2007-05-15
Pham, Thanhha S. (Department: 2813)
Semiconductor device manufacturing: process
Bonding of plural semiconductor substrates
Subsequent separation into plural bodies
C438S465000
Reexamination Certificate
active
10809566
ABSTRACT:
Provided is a treatment method of a semiconductor wafer facilitating picking-up of semiconductor chips and preventing contamination by a dicing sheet. A wafer back surface treating method is characterized in that a ground or polished surface of a semiconductor wafer activated in a grinding or polishing step, with semiconductor circuits formed thereon, is deactivated. In the method, the activation treatment with an oxidizing agent is preferable. Furthermore, the activation treatment is preferably implemented with blowing of ozone to a ground or polished surface of a wafer, with ozone water or with illumination of a ground or polished surface of a wafer with ultraviolet (UV). It is preferable to adhere a dicing sheet after the deactivation treatment.
REFERENCES:
patent: 5851664 (1998-12-01), Bennett et al.
patent: 6812064 (2004-11-01), Jiang et al.
patent: 2002/0004288 (2002-01-01), Nishiyama
patent: 2003-7646 (2003-01-01), None
Knobbe Martens Olson & Bear LLP
Nitto Denko Corporation
Pham Thanhha S.
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