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. 15, 2004
Filed:
Jul. 06, 2000
Ikuya Tagawa, Kawasaki, JP;
Tomoko Kutsuzawa, Kawasaki, JP;
Syuji Nishida, Kawasaki, JP;
Teruo Kiyomiya, Kawasaki, JP;
Yoshinori Ohtsuka, Kawasaki, JP;
Hiroshi Maeda, Kawasaki, JP;
Minoru Hasegawa, Kawasaki, JP;
Masahiro Kakehi, Kawasaki, JP;
Takashi Sekikawa, Kawasaki, JP;
Yukinori Ikegawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A thin film magnetic head includes an upper and a lower magnetic pole layer extending forward from a central magnetic core within a thin film coil. A narrow upper and lower front magnetic pole piece are connected to the front ends of the upper and lower magnetic pole layer, respectively. The upper front magnetic pole piece extends rearward from its front end exposed at a medium-opposed surface. The lower front magnetic pole piece extends in a lateral direction along the medium-opposed surface by a lateral width larger than that of the upper front magnetic pole piece. The lower front magnetic pole piece extends rearward from the medium-opposed surface by a longitudinal length smaller than that of the upper front magnetic pole piece. The lower front magnetic pole piece serves to concentrate the magnetic flux at the front ends of the upper and lower front magnetic pole pieces. Since the lower front magnetic pole piece is designed to have a larger lateral width in the lateral direction irrespective of a smaller length in the longitudinal direction, the production of the lower front magnetic pole piece can remarkably be facilitated.