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:
Mar. 27, 1984
Filed:
May. 18, 1981
Yoshihiro Shiroishi, Higashimurayama, JP;
Hideo Fujiwara, Tachikawa, JP;
Takeshi Kimura, Kokubunji, JP;
Noriyuki Kumasaka, Ohme, JP;
Nobuo Kobayashi, Kokubunji, JP;
Takeo Yamashita, Hachioji, JP;
Teizo Tamura, Katsuta, JP;
Hideo Zama, Yokohama, JP;
Mitsuhiro Kudo, Tokyo, JP;
Tsutomu Iimura, Tachikawa, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A magnetic head which uses single crystal Mn-Zn ferrite containing up to 7% by weight of SnO.sub.2 occluded therein without being allowed to separate and which has such a construction that glass having a contraction rate lower than that of ferrite is filled in the narrowed portion near the gap, the plane forming the principal magnetic circuit of the core is allowed to coincide with the {110} plane of the ferrite and an angle .theta. between the <100> direction inside the {110} plane of the ferrite and the gap-forming plane is from 5.degree. to 40.degree. or 85.degree. to 120.degree.. The magnetic head having such a construction has a reduced modulation noise and extremely excellent write-and-read characteristics.