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. 22, 1998
Filed:
Mar. 14, 1997
Tohru Matsunaga, Miyagi, JP;
Naoyuki Kaneyama, Miyagi, JP;
Takehiko Saito, Miyagi, JP;
Masatoshi Hayakawa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
Sliding noise characteristics can be considerably improved without degrading electromagnetic conversion characteristics and abrasion resistance characteristics in a recording/reproducing operation. A depth (H) of a contact width regulating groove (21) is set to be smaller than a contact width (W) of a magnetic recording medium sliding surface (a), and is set to a predetermined value of 25 .mu.m or more and 45 .mu.m or less. A depth (H) of the contact regulating groove is set to a predetermined value of 37.+-.12 .mu.m, the contact width (W) on the magnetic recording medium sliding surface (a) is set to a predetermined value of 55.+-.6 .mu.m, and a value (R) of a corner portion of the contact width regulating groove is set to a predetermined value of 16 .mu.m or less.