Patent · US Expired

Bar and crucible magnetic suspension for a crystal-growing apparatus

US5009865A · kind A · utility

25Cited by

7References

20Claims

0Family size

Assignee

Kernforschungsanlage Lulich Gesellschaft mit beschrankter Haftung · DE

Inventors

Karl Boden
Harald Ibach · Würselen, DE
Udo Linke · Düren, DE

Key dates

Filing date	Sep 4, 1985
Grant date	Apr 23, 1991
Priority date	—
Expiry date	Sep 4, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T117/1084
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A crystalline bar is drawn by a zone-melting process or from a melt in a crucible utilizing a magnetic suspension housing, in addition to an axial stabilization magnet, a radial stabilizer surrounding the core and including sensors for the radial position of the core-operating controllers for electromagnets surrounding the core to restore the core to its setpoint position. The fully magnetic suspension of the core eliminates friction while allowing enclosure of the crystal growth compartment to improve the quality of the crystal growth process.

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