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:
May. 06, 2008
Filed:
Sep. 29, 2004
Mutsumi Fujita, Kawasaki, JP;
Takashi Ito, Kawasaki, JP;
Mutsumi Fujita, Kawasaki, JP;
Takashi Ito, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A thin film magnetic head having a high write-in accuracy can be produced by suppressing a magnetic field leak between upper and lower magnetic poles. The method of producing the thin film magnetic head, in which a head substrate, magnetoresistance effect element, lower magnetic pole, write gap layer and an upper magnetic pole are formed in this order, has the lower magnetic pole patterned with a larger width than that of the upper magnetic pole in a write magnetic pole after the lower magnetic pole is formed. An insulation layer is formed in the same layer as the lower magnetic pole such that the insulation layer is flattened with the lower magnetic pole. The upper magnetic pole is formed on a surface of the write gap layer after the write gap layer is formed, and a protrusion of the lower magnetic pole is removed from a side face thereof.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile