Surface treatment of disk-shaped nickel-plated aluminum substrates

US4835909A · kind A · utility

Assignee

• BASF SE

Inventors

• Juergen Richter · Ludwigshafen, DE
• Werner Grau · Frankenthal (Pfalz), DE
• Gerd Maurer · Kaiserslautern, DE
• Friedrich Domas · Altlußheim, DE
• Werner Loeser · Ludwigshafen, DE
• Rainer Bender · Oberkirch, DE
• Axel-Ruediger Schulze · Offenburg, DE
• Kurt Doerr · Mannheim, DE

Key dates

• Filing date: Aug 6, 1987
• Grant date: Jun 6, 1989
• Expiry date: Aug 6, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B5/73919
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Disk-shaped nickel-plated aluminum substrates which are used as bases in the production of magnetic recording disks having a magnetizable metallic layer are surface treated by polishing and texturing.