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:
Oct. 14, 2014
Filed:
Oct. 20, 2010
Manabu Ueda, Ichihara, JP;
Yuji Murakami, Ichihara, JP;
Akira Sakawaki, Ichihara, JP;
Zhipeng Wang, Oyama, JP;
Manabu Ueda, Ichihara, JP;
Yuji Murakami, Ichihara, JP;
Akira Sakawaki, Ichihara, JP;
Zhipeng Wang, Oyama, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A production method of a magnetic recording medium of the present invention includes: a step of forming a magnetic layer () on a non-magnetic substrate (); a step of forming a dissoluble layer () on the magnetic layer (); a step of forming a mask layer () on the dissoluble layer (); a step of patterning the dissoluble layer () and the mask layer () to a shape corresponding to a magnetic recording pattern (); a step of performing a partial modification or removal of the magnetic layer () by use of the patterned mask layer (); and a step of dissolving the dissoluble layer () with a chemical agent so as to remove the dissoluble layer () together with the mask layer () formed thereon from the top of the magnetic layer (), wherein the magnetic recording medium has the magnetically-separated magnetic recording pattern ().