The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 2002
Filed:
Aug. 04, 1999
Christopher H. Bajorek, Los Gatos, CA (US);
Komag, Inc., San Jose, CA (US);
Abstract
A method for making magnetic disks comprises the steps of: applying a protective layer of material on a sheet of glass; b) cutting the sheet of glass into glass squares; c) stacking the glass squares; d) removing a circular core from the stack of glass squares, thereby defining the inner diameter of the glass substrates being formed; e) using a cutting annulus to cut through the stack of glass squares, thereby forming a stack of glass disks; f) subjecting the stack of glass disks to an edge polishing process to round the corners of the glass disks both at the inner and outer diameters; h) unstacking the glass disks; i) removing the protective layers from the glass disks; j) subjecting the glass disks to a chemical strengthening step; and k) sputtering an underlayer, magnetic layer and protective overcoat onto the glass substrate to thereby form a magnetic disk.