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:
Mar. 19, 2013
Filed:
Nov. 08, 2007
Applicant:
Naoto Matono, Saku, JP;
Inventor:
Naoto Matono, Saku, JP;
Assignee:
SAE Magnetics (H.K.) Ltd., Hong Kong, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/127 (2006.01); G11B 5/147 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a perpendicular magnetic write head capable of preventing unintended erasure of information due to spread of a magnetic field for writing. A leading shield, two side shields, and a trailing shield are disposed around (a front end portion of) a main magnetic pole layer. A nonmagnetic layer having a uniform thickness formed by ALD is provided between the front end portion and two side shields. Consequently, intervals are constant in any positions. Spread of magnetic fields for recording in a write track width direction is suppressed sufficiently more than the case where the intervals vary among positions.