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:
Jun. 29, 1999
Filed:
Sep. 08, 1997
Hitoshi Yamanishi, Higashiosaka, JP;
Isamu Aokura, Osaka, JP;
Koichi Osano, Osaka, JP;
Yasushi Inoue, Sanda, JP;
Fumio Sakai, Nabari, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
A magnetic head includes a back core made of ferrite and a magnetic alloy film arranged in a vicinity of a magnetic gap and having an average composition expressed by TxMyNz wherein T is Fe or Co; M is at least one metal selected from a group consisting of Nb, Zr, Ta, Hf, Cr, W and Mo; N is nitrogen; and x, y and z are atomic percentages holding 65.ltoreq.x.ltoreq.94, 5.ltoreq.y.ltoreq.25, 0<z.ltoreq.20 and x+y+z=100. The head includes an oxygen diffusion prevention part of a higher concentration of nitrogen than included in the whole magnetic alloy film which is provided at the magnetic alloy film at an interfacial part to the ferrite core.