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:
May. 12, 2015
Filed:
Oct. 24, 2012
Kazutaka Takizawa, Kanagawa, JP;
Akira Watanabe, Kanagawa, JP;
Kaori Kimura, Kanagawa, JP;
Takeshi Iwasaki, Tokyo, JP;
Akihiko Takeo, Tokyo, JP;
Kazutaka Takizawa, Kanagawa, JP;
Akira Watanabe, Kanagawa, JP;
Kaori Kimura, Kanagawa, JP;
Takeshi Iwasaki, Tokyo, JP;
Akihiko Takeo, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A manufacturing method of a magnetic recording medium includes follows: forming a magnetic recording layer on a substrate; forming an under layer and a metal release layer that forms an alloy with the under layer on the magnetic recording layer in this order and forming an alloyed release layer by alloying the under layer and the metal release layer; forming a mask layer on the alloyed release layer; forming a resist layer on the mask layer; providing a protrusion-recess pattern by patterning the resist layer; transferring the protrusion-recess pattern to the mask layer; transferring the protrusion-recess pattern to the alloyed release layer; transferring the protrusion-recess pattern to the magnetic recording layer; dissolving the alloyed release layer by using a stripping solution and removing a layer formed on the alloyed release layer from an upper side of the magnetic recording layer.