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:
Oct. 21, 2003
Filed:
Aug. 23, 2000
Kiyoshi Sato, Niigata-ken, JP;
Hideki Gochou, Niigata-ken, JP;
Kiyoshi Kobayashi, Niigata-ken, JP;
Hisayuki Yazawa, Niigata-ken, JP;
Akira Koyama, Niigata-ken, JP;
Minoru Yamada, Niigata-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A track width regulating section having a track width, which is smaller than the resolution obtained by the wavelength of the light used for exposure and development of a resist, is formed between a lower core layer and an upper core layer. Since the width of the upper core layer is larger than the track width, magnetic saturation can be effectively reduced. Inclined faces are formed on the upper surface of the lower core layer so as to be inclined in directions away from the track width regulating section, thereby adequately preventing write fringing.