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:
Jul. 31, 2001
Filed:
Feb. 16, 2000
Sony Corporation, Tokyo, JP;
Abstract
A magnetic recording medium which is capable of improving durability and reliability while satisfactory electromagnetic conversion characteristics are being maintained, the magnetic recording medium incorporating a non-magnetic support member; and a magnetic layer formed on the non-magnetic support member and mainly composed of magnetic powder and a binder and having a two-layer structure composed of a first magnetic layer and a second magnetic layer, wherein Young's modulus of the first magnetic layer is 140×10,N/m,to 160×10,N/m,and Young's modulus of the second magnetic layer is 45×10,N/m,to 50×10,N/m,. The specific surface area of the magnetic powder for use in the first magnetic layer is 42 m,/g to 46 m,/g and the specific surface area of the magnetic powder for use in the second magnetic layer is 32 m,/g to 35 m,/g.