Patent · US Expired

Apparatus for producing monocrystals

US4186173A · kind A · utility

4Cited by

10References

5Claims

0Family size

Assignee

Leybold-Heraeus GmbH & Co. KG · DE

Inventors

Karl Jericho · Hanau, DE
Joachim Floymayr
Uwe Reimpell · Hanau, DE
Dieter Drechsel · Bruchköbel, DE

Key dates

Filing date	Sep 12, 1977
Grant date	Jan 29, 1980
Priority date	—
Expiry date	Sep 12, 1997

Classification

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

Abstract

Apparatus for producing monocrystals by potless zone melting, in which the monocrystal, setting out from a seed crystal, passes through a neck and a transitional zone into the main part of the monocrystal. A chamber is provided for the formation of a vacuum or a protective gas atmosphere plus a heating device for the production of the melting heat, driving means for the mechanical movements necessary for the crystal formation, a mounting for the seed crystal, and a supporting device which is applicable to the monocrystal beyond the neck, and a plurality of gripping bodies distributed about the circumference and applicable to the monocrystal radially on its substantially cylindrical surface the gripping bodies are disposed such that they first perform a radial approach to the monocrystal until a virtually force-free contact is made therewith, adapting themselves to the surface geometry and position of the monocrystal, whereupon the gripping force is increased and the gripping bodies are locked.

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