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. 31, 1987
Filed:
Dec. 31, 1984
Ken Takahashi, Suita, JP;
Hiroshi Youda, Hirakata, JP;
Seishi Sasaki, Nishinomiya, JP;
Kenji Kanai, Neyagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A thin film magnetic head for reproducing perpendicular magnetization comprising an operative surface disposed to face a recording medium, a thin film magnetization detection portion including a magneto-resistive element perpendicular to the operative surface of the head with one side edge of the magnetization detection portion being exposed to the operative surface, ferromagnetic material with one end thereof being magnetically coupled to the side edge portion of the thin film magnetization detection portion most distant from said operative surface and with the other end thereof being exposed to the operative surface, and a non-magnetic material disposed in an area defined by the thin film magnetization detection portion, the ferromagnetic material and the operative surface, wherein the distance between the thin film magnetization detection portion and the ferromagnetic material at said operative surface is at least five times the distance between the end of the ferromagnetic material magnetically coupled to the side edge portions of the thin film magnetization detection portion and the operative surface.