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. 25, 2012
Filed:
Jun. 12, 2009
Tetsuya Mino, Hong Kong, CN;
Naoto Matono, Hong Kong, CN;
Ikuhito Onodera, Hong Kong, CN;
Kazushi Nishiyama, Hong Kong, CN;
Michitoshi Tsuchiya, Hong Kong, CN;
Kenji Sasaki, Hong Kong, CN;
Tetsuya Mino, Hong Kong, CN;
Naoto Matono, Hong Kong, CN;
Ikuhito Onodera, Hong Kong, CN;
Kazushi Nishiyama, Hong Kong, CN;
Michitoshi Tsuchiya, Hong Kong, CN;
Kenji Sasaki, Hong Kong, CN;
SAE Magnetics (H.K.) Ltd., Hong Kong, CN;
Abstract
A perpendicular magnetic write head capable of suppressing damage and corrosion of a magnetic pole to secure a stable writing performance is provided. A non-magnetic protruding layer protruding from a main magnetic pole layer (tip portion) toward an air bearing surface side is formed on both sides of the tip portion in a writing track width direction. The non-magnetic protruding layer is located closer to a recording medium than the tip portion during writing operation, and is more likely to be in contact with the writing medium instead of the tip portion. Since the protective film portion covering the tip portion hardly peels off (e.g., compared to the protective film portion covering the non-magnetic protruding layer), the tip portion is hardly damaged or corroded. Since the tip portion is protected physically and chemically by the non-magnetic protruding layer, deterioration of the soft magnetic characteristics of the tip portion is suppressed.