Patent · US Expired

Single-crystal rod and process for its production

US6461582B2 · kind B2 · utility

0Cited by

4References

5Claims

0Family size

Assignee

Wacker Siltronic Gesellschaft Fur Halbleitermaterialien AG · DE

Inventors

Martin Weber · Borgo San Lazzaro, DE
Erich Gmeilbauer · St. Pantaleon, AT
Robert Vorbuchner · Burghausen, DE
Alfred Miller · Scottsdale, US

Key dates

Filing date	Apr 13, 2001
Grant date	Oct 8, 2002
Priority date	—
Expiry date	Apr 13, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC30B15/22
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A single-crystal rod, obtained using CZ crucible pulling, has a crystal cone and a cylindrical single-crystal rod, and the crystal cone has an apex angle of 30° to 90°. There is also a process for producing dislocation-free single-crystal rods using CZ crucible pulling in which a seed crystal is immersed in a melt and is pulled out again, and a cone with an apex angle of from 30° to 90° is pulled.

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