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:
Dec. 31, 2024
Filed:
Aug. 04, 2023
Western Digital Technologies, Inc., San Jose, CA (US);
Cristian Papusoi, Santa Clara, CA (US);
Kai Tang, San Jose, CA (US);
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
A magnetic recording medium includes a rigid substrate, an amorphous soft magnetic underlayer (SUL) on the substrate, a dead magnetic layer on the SUL, a seed layer on the dead magnetic layer, and a magnetic recording layer (MRL) on the seed layer. The dead magnetic layer is configured to provide an interdiffusion region between the amorphous SUL and seed layer with a saturation magnetic moment per unit area less than 5×10electromagnetic unit (emu)/cm, and to produce a recording medium having an increase in tracks per inch (TPI) without significant reduction in bits per inch (BPI), and a net increase in areal density capacity (ADC) relative to a recoding medium that does not have the dead magnetic layer.