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. 11, 2018
Filed:
Jun. 22, 2015
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Tsuyoshi Yoshizawa, Sendai, JP;
Takehito Shimatsu, Sendai, JP;
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Abstract
The problem of the invention is to provide a process for producing a magnetic recording medium which exhibits both of excellent thermal stability and favorable writing capability. The process for producing the magnetic recording medium of the invention includes the steps of: (A) forming the first magnetic recording layer while monotonously changing a substrate temperature; and (B) forming the second magnetic recording layer while monotonously changing the substrate temperature wherein the material of the second magnetic recording layer is different from the material of the first recording layer, wherein the substrate temperature at the beginning of the step (B) is set such that the magnetic anisotropy constant of the first magnetic recording layer and the magnetic anisotropy constant of the second magnetic recording layer is changed monotonously at the interface between the first and second magnetic recording layers.