Influence of Nanothick Layers of DLC on the Rates of Electrochemical Reduction Reactions on Magnetic Hard Disks

2004 ◽  
Vol 151 (3) ◽  
pp. B195 ◽  
Author(s):  
Soyoung Jung ◽  
Thomas M. Devine
Keyword(s):  
Electrochemical Reduction ◽  
Hard Disks ◽  
Reduction Reactions ◽  
Magnetic Hard Disks

Electrodeposited Co-Pt thin films for magnetic hard disks

1993 ◽  
Vol 120 (1-3) ◽  
pp. 300-304 ◽  
Author(s):  
B. Bozzini ◽  
D. De Vita ◽  
A. Sportoletti ◽  
G. Zangari ◽  
P.L. Cavallotti ◽  
...  
Keyword(s):  
Thin Films ◽  
Hard Disks ◽  
Magnetic Hard Disks

Electrochemical Tests of Corrosion of Magnetic Hard Disks With Overcoats of DLC

2003 ◽  
Author(s):  
Soyoung Jung ◽  
Thomas M. Devine
Keyword(s):  
Anodic Polarization ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Low Frequency ◽  
Quantitative Relationship ◽  
Hard Disks ◽  
Electrochemical Tests ◽  
Magnetic Hard Disks ◽  
Metal Layers ◽  
Dc Polarization

Two electrochemical techniques were used to investigate the corrosion of DLC coated magnetic hard disks: (1) potentiodynamic and potentiostatic anodic polarization and (2) electrochemical impedance spectroscopy. The objective was to determine the ability of DC polarization and AC polarization to detect the presence of porosity in the DLC. The results indicate that anodic polarization at high potentials (≈ +1.0V vs SCE) to cause pitting corrosion of the metal layers underneath the DLC might provide a rapid and quantitative estimate of the amount of porosity in the DLC. Measurement of the low frequency electrochemical impedance at intermediate potentials (≈ +0.5V vs SCE) appears to indicate the presence of porosity but further work is required to establish a quantitative relationship between the amount of porosity and the value of the low frequency impedance.

Ultrathin protective overcoats on magnetic hard disks

1998 ◽  
Vol 34 (4) ◽  
pp. 1717-1719 ◽  
Author(s):  
E.V. Anoikin ◽  
G.S. Ng ◽  
M.M. Yang ◽  
J.L. Chao ◽  
J.R. Elings ◽  
...  
Keyword(s):  
Hard Disks ◽  
Magnetic Hard Disks ◽  
Protective Overcoats

Staging Methods

2011 ◽  
pp. 263-271
Author(s):  
Phillip K.C. Tse
Keyword(s):  
Hard Disks ◽  
Input Output ◽  
Secondary Storage ◽  
Storage Devices ◽  
Magnetic Hard Disks ◽  
Tertiary Storage ◽  
Entire Object

When data are stored in the tertiary storage devices, the tape drives shall read them from the tapes using the input/output (I/O) operations. Due to the long delay in exchanging tapes, it is inconvenient to exchange a tape for each read/write access operation. Thus, the entire object or file is accessed from the tape drives well before they are being used (Federighi & Rowe, 1994; Kienzle, 1995; Pang, 1997). These accessed objects are temporarily stored in the magnetic hard disks as secondary storage level.

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