| US 7,491,270 B2 | ||
| Heat shield member and single crystal pulling device | ||
| Hitoshi Sasaki, Tokyo (Japan); and Syunji Kuragaki, Tokyo (Japan) | ||
| Assigned to Sumco Corporation, Tokyo (Japan) | ||
| Appl. No. 11/577,989 PCT Filed Oct. 26, 2004, PCT No. PCT/JP2004/015827 § 371(c)(1), (2), (4) Date Apr. 25, 2007, PCT Pub. No. WO2006/046280, PCT Pub. Date May 04, 2006. |
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| Prior Publication US 2008/0127886 A1, Jun. 05, 2008 | ||
| Int. Cl. C30B 35/00 (2006.01) | ||
| U.S. Cl. 117—200 [117/208; 117/213; 117/217; 117/900] | 3 Claims |
| 1. A heat shielding member, which thermally shields the periphery of a single crystal, which is used in a Czochralski single
crystal pulling device that pulls the single crystal from a melt that is collected in a crucible, comprising:
a substantially cylindrical main body portion arranged so as to surround the single crystal, with a lower end portion thereof
extending to the vicinity of the melt;
a substantially annular bottom plate portion that extends in the diameter direction from the bottom end portion of the main
body portion to cover the melt, and
a support portion that extends to the inner circumference side of the main body portion provided in the bottom end portion
of the main body portion,
wherein the bottom plate portion is detachably placed on the support portion and is attached to the main body portion in the
state of being severed in the circumferential direction at at least one location.
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