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:
Jan. 21, 2003
Filed:
Nov. 06, 2000
Yoshihiko Inoue, Miyagi, JP;
Junichi Honda, Miyagi, JP;
Fusashige Tokutake, Miyagi, JP;
Atsushi Suzuki, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magnetic head forms a closed magnetic circuit with a magnetic core and has a gap in the closed magnetic circuit. At least a part of the magnetic core is composed of soft magnetic laminated films made by laminating soft magnetic thin film layers and noble metal layers. The soft magnetic thin film layers are exhibited by a composition formula of Fe Si Ta Ru Ga N (where “a”, “b”, “c”, “d”, “e” and “f” in the formula indicate compositions of respective elements by the atomic percent), and ranges of the compositions are: 62 atomic percent<a<75 atomic percent; 7 atomic percent<b<18 atomic percent; 3 atomic percent<c<10 atomic percent; 0 atomic percent≦d<10 atomic percent; 0 atomic percent≦e<6 atomic percent; 5 atomic percent<f<12 atomic percent; and b+c>13 atomic percent. The noble metal layers contain at least a kind of Pt, Au, Ag and Pd.