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:
Mar. 17, 2009
Filed:
May. 27, 2004
Charles Changqing Chen, Milpitas, CA (US);
Thanh Thien Ha, San Jose, CA (US);
Abebe Hailu, San Jose, CA (US);
Taesun Ernest Kim, San Jose, CA (US);
Mariana Rodica Munteanu, Santa Clara, CA (US);
Steve Kuo-hsing Hwang, San Jose, CA (US);
Charles Changqing Chen, Milpitas, CA (US);
Thanh Thien Ha, San Jose, CA (US);
Abebe Hailu, San Jose, CA (US);
Taesun Ernest Kim, San Jose, CA (US);
Mariana Rodica Munteanu, Santa Clara, CA (US);
Steve Kuo-Hsing Hwang, San Jose, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
CoCrPtB is a conventional material used in some of the layers of a thin film magnetic media structure used for recording data in data storage devices such as hard drives. Typically the CoCrPtB layers used for magnetic media have high Cr and low B in bottom magnetic layers and low Cr and high B in top magnetic layers. In accordance with one embodiment of this invention and to improve media electrical performance, fifth elements, such as Ta, Nb and Hf, etc. were added to the CoCrPtB materials, resulting in CoCrPtB—X, to enhance the grain segregation. The five element CoCrPtB—X layers were deposited using a pulsed direct current sputter technique instead of conventional direct current sputtering techniques. The resulting magnetic media structure having CoCrPtB—X alloy layers exhibits an increase in coercivity Hc and improvement in recording performance.