Dynamic magnetic information storage or retrieval – Record medium – Disk
Reexamination Certificate
2011-08-30
2011-08-30
Heinz, A. J. (Department: 2627)
Dynamic magnetic information storage or retrieval
Record medium
Disk
C360S235200, C427S130000, C427S249700, C427S530000, C427S532000, C427S551000, C427S553000, C204S157410, C204S157430, C204S157440, C204S192110, C029S603130
Reexamination Certificate
active
08009387
ABSTRACT:
A method for forming a protective bilayer on a magnetic read/write head or magnetic disk. The bilayer is formed as an adhesion enhancing underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is formed of an aluminum or alloyed aluminum oxynitride, having the general formula AlOxNyor MezAlOxNywhere Mezsymbolizes Tiz, Sizor Crzand where x, y and z can be varied within the formation process. By adjusting the values of x and y the adhesion underlayer contributes to such qualities of the protective bilayer as stress compensation, chemical and mechanical stability and low electrical conductivity. Various methods of forming the underlayer are provided, including reactive ion sputtering, plasma assisted chemical vapor deposition, pulsed laser deposition and plasma immersion ion implantation.
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Cha Ellis T.
Cheng Shide
Feng Zhu
Ackerman Stephen B.
Heinz A. J.
SAE Magnetics (HK) Ltd.
Saile Ackerman LLC
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