发明名称 |
METHOD AND APPARATUS FOR PREPARING CRYSTAL |
摘要 |
A method and an apparatus for producing crystals wherein crystal quality can be kept and a crystal composition is uniformed from a growth early stage to a growth last stage are provided. In an apparatus for producing crystals wherein the crystals 13 are grown from a liquefying raw material 12 in a crucible retained in a furnace and slowly cooling the raw material 12 in the crucible 11 from below upward, the apparatus comprises a raw material supply apparatus 18 which supplies a resupply raw material, and a reflection plate 20 placed above the crucible 11, which liquefies the resupply raw material 19 supplied from the raw material supply apparatus 18 and drops it as a liquid into the crucible. |
申请公布号 |
EP1757716(B1) |
申请公布日期 |
2016.08.17 |
申请号 |
EP20050749034 |
申请日期 |
2005.06.10 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
SASAURA, MASAHIRO;KOHDA, HIROKI;FUJIURA, KAZUO;KOBAYASHI, TAKASHI;IMAI, TADAYUKI;KURIHARA, TAKASHI |
分类号 |
C30B11/00;C30B11/04;C30B29/30;C30B35/00 |
主分类号 |
C30B11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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