Title:
A quartz glass crucible for silicon single crystal raising, and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6025278
Kind Code:
B2
Abstract:
The present invention provides a vitreous silica crucible which inhibits a deformation even when used under a high temperature condition for a long time, and a method for manufacturing the same. The vitreous silica crucible comprises: a substantially cylindrical straight body portion having an opening on the top end and extending in a vertical direction, a curved bottom portion, and a corner portion connecting the straight body portion with the bottom portion and a curvature of which is greater than that of the bottom portion, wherein, the vitreous silica crucible comprises a transparent layer on the inside and a bubble layer on the outside thereof, a compressive stress layer in which compressive stress remains in the inner surface side of the transparent layer, and a tensile stress layer in which tensile stress remains and is adjacent to the compressive stress layer at a gradual rate of change of stress.
Inventors:
Toshiaki Sudo
Ken Kitahara
Akihiro
Oshuya Kaji
Fumie Yoshida
Makiko Asahioka
Kitahara Eriko
Tadahiro Sato
Ken Kitahara
Akihiro
Oshuya Kaji
Fumie Yoshida
Makiko Asahioka
Kitahara Eriko
Tadahiro Sato
Application Number:
JP2015519596A
Publication Date:
November 16, 2016
Filing Date:
May 31, 2013
Export Citation:
Assignee:
Sumco inc.
International Classes:
C30B29/06; C03B20/00; C30B15/10
Domestic Patent References:
| JP2013112597A | 2013-06-10 | |||
| JP2012116702A | 2012-06-21 | |||
| JP2013095652A | 2013-05-20 | |||
| JP2013112597A | 2013-06-10 | |||
| JP2012116702A | 2012-06-21 | |||
| JP2013095652A | 2013-05-20 |
Foreign References:
| WO2011013695A1 | 2011-02-03 |
Attorney, Agent or Firm:
Ichiro Nomura
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