Patent ID: 6736705
Filing Date: 2004-05-18
Classification: B24B

Abstract:
A method for manufacturing a glass or ceramic disk substrate for a rotating disk drive data storage device, comprising the steps of:providing an unpolished glass or ceramic disk substrate; loading said unpolished disk substrate to a polishing apparatus; polishing at least one flat surface of said unpolished disk substrate to a finished state suitable for use in a disk drive data storage apparatus using said polishing apparatus, said polishing step being accomplished without intermediate unloading of said disk substrate; and wherein said polishing step comprises a plurality of stages, including a first stage for polishing said unpolished disk substrate at a first polishing speed and a first polishing pressure, and a second stage for polishing said unpolished disk substrate as a second polishing speed and a second polishing pressure, said second stage being performed after said first stage, said second polishing speed being less than said first polishing speed and said second polishing pressure being less than said first polishing pressure.