Maxtor Corporation

Komag Corporation

Bruce Lairson

Mourad Benakli

Tsutomu Tom Yamashita

Wen Hong Liu

Hai Chi Nguy

Ching Jackie Tsoi

Eric Woo Hock Yong

Shigeto Hashimoto

Michael L Mallary

Mark A Nichols

Adam F Torabi

Tim Glassburn

A magnetic recording medium having a soft magnetic underlayer structure that includes two soft underlayers is presented. A thick first soft underlayer, disposed on the medium substrate, is made of material which provides a low magnitude of magnetization saturation (Bsat) and high permeability. The first soft underlayer can be formed by plating or high-rate sputtering. The second soft underlayer, which has a lesser thickness than the first soft underlayer, is made of a material which provides a relatively high magnitude of Bsat and low permeability. The second soft underlayer can be formed by low-rate sputtering. The first soft under layer can be isolated from other layers in the medium by an exchange isolation layer. The second soft underlayer can be exchange coupled to a radial exchange pin layer disposed on the exchange isolation layer.

Soft underlayer structure for magnetic recording

A method for reducing flux concentrating capacity of a shield in a magnetic read/write head positioned to read perpendicular residual magnetic fields on a magnetic media. Permeability of the shield is reduced in a direction oriented perpendicular to the magnetic media by inducing a transverse magnetic bias field within the shield.

Transverse biased shields for perpendicular recording to reduce stray field sensitivity

A magnetic recording system includes a magnetic medium and a magnetic write head to write information on the magnetic medium. The magnetic write head includes a write pole having a downstream side that has a concave shaped portion when the write pole is viewed from an air bearing surface of the magnetic write head.

Concave trailing edge write pole for perpendicular recording

A method for making a magnetic disk comprises forming first and second protective carbon layers on a magnetic layer. The first protective carbon layer is predominantly SP3 carbon. The second protective carbon layer comprises about 50% or less SP3 carbon. The second protective carbon layer is very thin, e.g. between 0.1 and 1.0 nm thick. A lubricant layer (e.g. a perfluoropolyether lubricant) is applied to the second protective carbon layer. The second protective carbon layer facilitates improved cooperation between lubricant and the disk.

Magnetic disk comprising a first carbon overcoat having a high SP3 content and a second carbon overcoat having a low SP3 content

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Los Altos, CA, United States of America

Bruce Lairson