Patent ID: 9453291
Filing Date: 2016-09-27
CPC Classification: C30B,Y10T

Claim Text:
1. A single crystal pulling apparatus comprising: a crucible unit including a crucible and a tray for securing and holding the crucible from below; and a crucible rotating shaft for supporting the tray from below and for elevating and lowering the tray and the crucible while rotating the tray and the crucible, wherein the single crystal pulling apparatus has a gap portion formed by interposing a low heat conductive member for suppressing heat conduction from the crucible to the crucible rotating shaft at least one of on a joint surface between the crucible and the tray and on a joint surface between the tray and the crucible rotating shaft, so that at least one of (i) the crucible and the tray do not make direct contact with each other and (ii) the tray and the crucible rotating shaft do not make direct contact with each other.