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:
Sep. 05, 2006
Filed:
Mar. 03, 2003
Atsushi Yamaguchi, Chuo-ku, JP;
Tetsuya Mino, Chuo-ku, JP;
Seiji Yari, Chuo-ku, JP;
Shigeru Ichihara, Chuo-ku, JP;
Atsushi Yamaguchi, Chuo-ku, JP;
Tetsuya Mino, Chuo-ku, JP;
Seiji Yari, Chuo-ku, JP;
Shigeru Ichihara, Chuo-ku, JP;
TDK Corporation, Tokyo, JP;
Abstract
An electroplated magnetic thin film consisting of an electroplated film of Fe—Co alloy containing Fe by an amount of 52–86 wt % and having a highly packed fine crystal grain structure, a flat and glossy surface, a high saturation magnetic flux density not less than 2.1 T, a low coercive force of 5–10 Oe, and being particularly suitable as a pole portion of a thin film magnetic head is proposed. The electroplated magnetic thin film is deposited on a substrate by an electroplating process with a pulsatory current or direct current having a current density of 3–120 mA/cmwhile using an electroplating bath containing one or both of sulfate salt and hydrochloric salt serving as supply sources of Fe ions and Co ions, saccharin sodium serving as a stress relaxation agent by an amount not less than 1 g/l, boric acid as a pH buffer agent, ammonium chloride as an electrically conductivity salt, and sodium lauryl sulfate as a surfactant.