Seagate Technology Incorporated

Steve Kuo-Hsing Hwang

Mariana Rodica Munteanu

Michael C Wu

Weilu Hang Xu

Miaogen Lu

Shanghsien Alex Rou

Abebe Hailu

Taesun Ernest Kim

Charles Changqing Chen

Edward T Yen

Thanh Thien Ha

Ed Yen

An embodiment of the invention relates to a perpendicular magnetic recording medium comprising (1) a substrate, (2) an interlayer comprising hexagonal columns and (3) a magnetic layer, wherein the magnetic layer is deposited applying a bias voltage to the substrate such that the magnetic layer comprises magnetic grains having substantially no sub-grains within the magnetic layer, and the magnetic layer has perpendicular magnetic anisotropy.

High density granular perpendicular recording media for mechanical reliability and corrosion resistance

Applying bias voltage during formation of granular recording media

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&#x2014;X, to enhance the grain segregation. The five element CoCrPtB&#x2014;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&#x2014;X alloy layers exhibits an increase in coercivity Hc and improvement in recording performance.

Magnetic recording media having five element alloy deposited using pulsed direct current sputtering

Growing community of inventors

San Jose, CA, United States of America

Steve Kuo-Hsing Hwang