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:
Aug. 01, 2006
Filed:
Mar. 19, 2002
Tom King Harris, Iii, Morgan Hill, CA (US);
Wen-chien David Hsiao, San Jose, CA (US);
Gautam Mohan Khera, Morgan Hill, CA (US);
David Kaimon Lee, San Jose, CA (US);
Edward Hin Pong Lee, San Jose, CA (US);
Hugo Alberto Emilio Santini, San Jose, CA (US);
Samuel Wei-san Yuan, Sartoga, CA (US);
Tom King Harris, III, Morgan Hill, CA (US);
Wen-chien David Hsiao, San Jose, CA (US);
Gautam Mohan Khera, Morgan Hill, CA (US);
David Kaimon Lee, San Jose, CA (US);
Edward Hin Pong Lee, San Jose, CA (US);
Hugo Alberto Emilio Santini, San Jose, CA (US);
Samuel Wei-san Yuan, Sartoga, CA (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A magnetic head having improved overwrite capabilities and reduced fringing fields are described along with methods of making the same. The magnetic head has a first pole piece and a second pole piece. The first pole piece includes a first bottom pole piece layer, a pedestal portion formed over the first bottom pole piece layer, and a notched top pole portion formed over the pedestal portion. A gap layer separates the second pole piece from the notched top pole portion. The pedestal portion has a first saturation magnetization Mand the top pole portion has a second saturation magnetization Mthat is greater than the first saturation magnetization M. The top pole portion has a substantially planar top surface over which a portion of the gap layer and the second pole piece are formed.