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:
Jul. 30, 1996
Filed:
Nov. 02, 1993
Katsumi Onodera, Matsumoto, JP;
Hiroyuki Nakamura, Nagano, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
A magnetic recording medium with improved friction and levitation characteristics and undiminished electromagnetic conversion characteristics, and a method for manufacturing such a medium, are disclosed. A magnetic recording disk substrate with Ni--P plated layers formed on both faces of an aluminum alloy substrate is given a texturing treatment using a grinding tape to form textures with a maximum cross angle within a range from 30.degree. to 50.degree., and then a slurry grinding treatment to remove irregular protrusions generated during the texturing process is applied using freely moving polycrystalline diamond abrasive grains with an average size of about 1 .mu.m or smaller.