Quartz glass crucible and process for the manufacture of the crucible

US6548131B1 · kind B1 · utility

Assignee

• HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

• Heinz Fabian · Alzenau, DE
• Martin Arndt · Aachen, DE
• Johann Leist · Schongau, DE
• Udo Gertig · Goldbach, DE
• Wolfgang Englisch · Kelkheim, DE

Key dates

• Filing date: Apr 12, 2000
• Grant date: Apr 15, 2003
• Expiry date: Apr 12, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24999
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

To facilitate the start of a process using a quartz glass crucible with a crucible body and an inner layer of quartz glass a quartz glass crucible is provided with an inner surface roughened at least in the starting zone region by multiple depressions disposed at a maximum distance of 5 mm from one another. Furthermore, a simple and inexpensive process for the manufacture of such a quartz glass crucible is described, by providing a crucible body with a smooth inner surface of quartz glass and subsequently roughening the inner layer in the starting zone region by multiple depressions disposed at a maximum of 5 mm from one another.