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:
Nov. 15, 2005
Filed:
Sep. 23, 2003
Applicant:
Noboru Yamanaka, Chuo-ku, JP;
Inventor:
Noboru Yamanaka, Chuo-ku, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B005/147 ;
U.S. Cl.
CPC ...
Abstract
In a first magnetic film, two notches are formed separately by a given distance, and a first pole piece is located between the notches. The first pole piece includes a uniform width portion. A second magnetic film includes a second pole piece. In the first pole piece, if the height of the uniform width portion is defined by 'TH1', and the depth of the uniform width portion to a top surface from a base plane of the first magnetic film is defined by 'ND1', and the thickness of said gap film is defined by “WG”, the relations of TH1≧4WG and ND1≧4WG are satisfied.