Patent · US Expired

Device for producing single crystals

US6712904B1 · kind B1 · utility

10Cited by

8References

26Claims

0Family size

Assignees

Forschungszentrum Jülich GmbH · DE
FRIEBERGER COMPOUND MATERIALS GMBH · DE

Inventors

Klaus Sonnenberg · Niederzier, DE
Eckhard Küssel · Bakum, DE
Thomas Bünger · Neubukow, DE
Tilo Flade · Freiberg, DE
Berndt Weinert · Freiberg, DE

Key dates

Filing date	Sep 19, 2001
Grant date	Mar 30, 2004
Priority date	—
Expiry date	Sep 19, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T117/1088
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A device is made available for producing monocrystals, for example large-diameter gallium arsenide monocrystals, that has a cylindrical heating appliance with a floor heater (2) and a cover heater (3). The heating surfaces of the floor and the cover heater are considerably larger than the cross-sectional area of the monocrystal to be produced. In addition, an insulator (6) is planned for the reaction space that is designed to prevent a radial heat flow and the guarantee a strictly axial heat flow over the complete height of the reaction space between the cover heater (3) and the floor heater (2).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.