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. 17, 2001
Filed:
Jan. 08, 1997
Wei Cao, Fremont, CA (US);
James Ward, Sunnyvale, CA (US);
Mike Tregoning, Milpitas, CA (US);
Xingbo Yang, Pleasanton, CA (US);
Akashic Memories Corporation, San Jose, CA (US);
Abstract
The present invention provides magnetic recording media comprising a rigid substrate and an underlayer disposed over the substrate, in which the underlayer comprises CrTiCu or CrTiV. A magnetic layer is disposed over this underlayer, and is also disposed over a texturized surface. Generally, the substrate comprises aluminum, and an NiP layer is disposed over the substrate and below the underlayer. The texture will typically be imposed on this NiP layer. Advantageously, the CrTiCu or CrTiV underlayer has been found to compensate for texture-induced anisotropy, limiting a ratio of circumferential coercivity to radial coercivity within the range between about 0.8 and 1.25.