Multiblade inner hole saw for the sawing of crystal rods into thin blades

US4834062A · kind A · utility

Assignee

• Wacker Chemitronic · DE

Inventors

• Walter Frank · Altötting, DE
• Gerhard Palme · Gmunden, AT

Key dates

• Filing date: May 26, 1988
• Grant date: May 30, 1989
• Expiry date: May 26, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/778
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A multi-blade inner hole saw for the sawing of crystal rods or blocks, such as solar cell base material on a silicon base, into thin wafers has saw blades arranged mirror-symmetrically with respect to the bearing on either side of a common drive cylinder. In the sawing operation, the workpieces are sawn synchronously by the saw blades.