Laser texturing apparatus with dual laser paths having an independently adjusted parameter

US5822211A · kind A · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Michael Barenboim · Boca Raton, US
• Peter Michael Baumgart · San Diego, US
• Peter P. Chrusch · Boynton Beach, US
• Benny Michael Harper · Boca Raton, US
• Benjamin Kami · San Jose, US
• Pieter J. Kerstens · Boca Raton, US
• Michael G. Lisanke · Boynton Beach, US
• Huizong Lu · Coral Springs, US
• Lanphuong Thi Pena · Jacksonville, US
• Eric V. Schnetzer · Boynton Beach, US
• Hong S. Seing · San Jose, US
• Ali Reza Taheri · Boca Raton, US
• Andrew Ching Tam · Saratoga, US

Key dates

• Filing date: Nov 13, 1996
• Grant date: Oct 13, 1998
• Expiry date: Nov 13, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B23/0028
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A disk texturing process uses a single pulsed laser to texture disks within a first group, which are carried through the texturing process on a first spindle assembly, and from a second group, which are carried through the texturing process on a second spindle assembly. Preferably, disks from the first group are textured alternately with disks in the second group. A first level of least one texturing parameter is stored for use only as the process is applied to disks from the first group, while a second level of the same texturing parameter is stored for use only as the process is applied to disks from the second group. These levels may be derived from measurements of textured spots made with interferometric devices forming portions of a texturing station.