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:
Feb. 27, 1990
Filed:
Apr. 25, 1988
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
An apparatus for manufacturing a single crystal of compound semiconductor consisting of Ga and As comprises a crucible storing Ga and having a seed crystal arranged at a lower end portion thereof a gas material susceptor, arranged below the crucible, for storing As, the gas material susceptor and the crucible being arranged in a growth susceptor to be capable of communicating with each other, a main heater for heating and melting Ga in the crucible and for cooling the melt Ga from a lower portion thereof to grow a single crystal, a sub heater for heating and evaporating As in the gas material susceptor and allowing the evaporated As to react with the melt Ga in the said crucible, and a magnetic field applying coil for applying a vertical magnetic field in the melt Ga and As in the crucible so that a surface of the melt in the crucible which is grown to a single crystal is lower in temperature at a central portion thereof than a peripheral portion thereof in a radial direction and at the same time projects upward.