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:
Nov. 25, 2003
Filed:
Aug. 16, 2001
Seiji Yari, Tokyo, JP;
Atsushi Yamaguchi, Tokyo, JP;
Tetsuya Mino, Tokyo, JP;
Kazuo Ishizaki, Tokyo, JP;
Jun-ichi Hokushin, Tokyo, JP;
Junichi Sato, Tokyo, JP;
Kazuya Maekawa, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
In a method of forming a track width defining layer including a magnetic pole portion, a base film is initially formed on a write gap layer. The base film includes a first layer made of a magnetic material having a saturation magnetic flux density of 1.8 T or more, and a second layer formed on the first layer and made of a magnetic material. The magnetic material forming the second layer is a material containing Fe or Ni as a main component and without containing Co. Then, a frame having an opening of a shape matching with the track width defining layer is formed on the second layer. Subsequently, the track width defining layer is formed within the opening by electroplating, using the base film as an electrode.