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. 07, 2002
Filed:
Apr. 12, 2000
Yasutaka Fukuda, Chiyoda-ku, JP;
Yoshihito Tachi, Taito-ku, JP;
Kawatetsu Mining Co., Ltd., Tokyo, JP;
Abstract
A magnetic ferrite paste is applied onto an Si substrate, and then sintered to form thereon a magnetic ferrite film having a mean composition that comprises from 40 to 50 mol % of Fe O , from 15 to 35 mol % of ZnO, from 0 to 20 mol % of CuO, and from 0 to 10 mol % of Bi O with NiO and inevitable impurities as the balance. The magnetic ferrite film thus formed on an Si substrate is for magnetic devices, and it forms a region not containing CuO or having a CuO content of at most 5 mol % around its interface directly adjacent to the surface of the Si substrate. The adhesiveness of the magnetic ferrite film to the underlying Si substrate is high, and the reliability of the magnetic device having the magnetic film is therefore high.