The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2009
Filed:
Jun. 10, 2005
Masahiro Sasaura, Atsugi, JP;
Hiroki Kohda, Hiratsuka, JP;
Kazuo Fujiura, Atsugi, JP;
Takashi Kobayashi, Isehara, JP;
Tadayuki Imai, Atsugi, JP;
Takashi Kurihara, Mito, JP;
Masahiro Sasaura, Atsugi, JP;
Hiroki Kohda, Hiratsuka, JP;
Kazuo Fujiura, Atsugi, JP;
Takashi Kobayashi, Isehara, JP;
Tadayuki Imai, Atsugi, JP;
Takashi Kurihara, Mito, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
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 crystalsare grown from a liquefying raw materialin a crucible retained in a furnace and slowly cooling the raw materialin the cruciblefrom below upward, the apparatus comprises a raw material supply apparatuswhich supplies a resupply raw material, and a reflection plateplaced above the crucible, which liquefies the resupply raw materialsupplied from the raw material supply apparatusand drops it as a liquid into the crucible.