Structure of nitrogenated carbon overcoats on thin-film hard disks

1997 ◽  
Vol 33 (6) ◽  
pp. 4551-4559 ◽  
Author(s):  
L. Huang ◽  
Y. Hung ◽  
S. Chang
Keyword(s):  
Thin Film ◽  
Hard Disks ◽  
Carbon Overcoats ◽  
Nitrogenated Carbon

Metastable Phase Formation in Thin Films and Multilayers

MRS Bulletin ◽  
1990 ◽  
Vol 15 (2) ◽  
pp. 19-28 ◽  
Author(s):  
Bruce M. Clemens ◽  
Robert Sinclair
Keyword(s):  
Thin Film ◽  
Large Scale ◽  
Metastable Phase ◽  
Dominant Role ◽  
Contact Region ◽  
Atomic Scale ◽  
Hard Disks ◽  
Multilayered Structures ◽  
Optical Elements ◽  
Metal Metal

It is well known that thin-film technology relies increasingly on multilayered structures. As dimensions become smaller, the interfacial or contact region assumes a larger and often dominant role in the performance or properties. Many examples come readily to mind. In magnetic hard disks, the active cobaltalloy layer, itself only about 50 nm thick, is grown either on a crystalline chromium thin film or directly onto amorphous nickel-phosphorous, and capped with a protective carbon or chromium-carbon coating (see Figure 1). The recording head “flies” at 90 mph and about 0.1 ü above this combination, which is expected to be mechanically durable and magnetically reliable for thousands of recordings. Atomic-scale multilayers are being investigated to provide the ability to “tune” the magnetic properties of the active recording layer or head materials. Exchange coupled magneto-optical media consisting of a few tens of angstroms of cobalt or nickel layers on amorphous TbFeCo alloys are showing promise for improving magneto-optical coupling while maintaining perpendicular anisotropy. In microelectronic circuits, aluminum or silicide contacts to silicon are essential to any device, and multilevel integration involving a series of metal, alloy, silicon (amorphous, poly- or monocrystalline) and dielectric layers (some of which might be 1-10 nm thick) are increasingly required to achieve large-scale integration. Metal-metalloid (e.g., MoSi, W-C) multilayers are used for x-ray optical elements. Artificially produced metallic superlattices and multilayers are being used to probe the fundamental magnetic, electronic, mechanical, and structural properties of metal-metal interfaces.

Raman and resistivity investigations of carbon overcoats of thin‐film media: Correlations with tribological properties

1991 ◽  
Vol 69 (8) ◽  
pp. 5748-5750 ◽  
Author(s):  
B. Marchon ◽  
N. Heiman ◽  
M. R. Khan ◽  
A. Lautie ◽  
J. W. Ager ◽  
...  
Keyword(s):  
Thin Film ◽  
Tribological Properties ◽  
Carbon Overcoats

Metallic Thin Film Media for Hard Disks

1987 ◽  
Vol 2 (1) ◽  
pp. 15-23
Author(s):  
F. Goto ◽  
H. Tanaka ◽  
M. Yanagisawa ◽  
Y. Suganuma ◽  
S. Ito
Keyword(s):  
Thin Film ◽  
Hard Disks ◽  
Metallic Thin Film

Ion beam deposition of carbon overcoats for magnetic thin film media

2000 ◽  
Vol 36 (1) ◽  
pp. 120-124 ◽  
Author(s):  
K.J. Grannen ◽  
Xiaoding Ma ◽  
R. Thangaraj ◽  
Jing Gui ◽  
G.C. Rauch
Keyword(s):  
Thin Film ◽  
Ion Beam ◽  
Magnetic Thin Film ◽  
Ion Beam Deposition ◽  
Carbon Overcoats ◽  
Beam Deposition

Detection of Cadmium and Copper Cations Using Amorphous Nitrogenated Carbon Thin Film Electrodes

2012 ◽  
Vol 24 (9) ◽  
pp. 1839-1846 ◽  
Author(s):  
Serigne Massamba Seck ◽  
Stéphane Charvet ◽  
Modou Fall ◽  
Emmanuel Baudrin ◽  
Michaël Lejeune ◽  
...  
Keyword(s):  
Thin Film ◽  
Carbon Thin Film ◽  
Thin Film Electrodes ◽  
Copper Cations ◽  
Nitrogenated Carbon

Tribological behavior of thin film rigid disks with regular dot array texture on carbon overcoats

1994 ◽  
Vol 30 (6) ◽  
pp. 4113-4115 ◽  
Author(s):  
H. Tanaka ◽  
F. Ishikawa ◽  
K. Gomi ◽  
N. Yamaguchi ◽  
Y. Miyake
Keyword(s):  
Thin Film ◽  
Tribological Behavior ◽  
Rigid Disks ◽  
Carbon Overcoats

Studies on Wear Mechanism of Ultrathin Protective Carbon Overcoat by Micro-Wear Scan Technique

1994 ◽  
Vol 356 ◽  
Author(s):  
T. W. Wu
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Wear Mechanism ◽  
Wear Debris ◽  
Normal Load ◽  
Morphology Evolution ◽  
Carbon Overcoat ◽  
Testing Area ◽  
Mechanical Measurements ◽  
Carbon Overcoats

AbstractBy combining the micro-wear and microscratch techniques in a microindenter, a new methodology to investigate the mechanical properties of ultrathin coatings has been developed. With a 0.18 μm/sec scratch speed along a Y-direction while oscillating the indenter tip along the X-direction at a 6.55 Hz frequency, uniform wear tracks of approximately 20 μm × 90 μm in dimension can be created under either a constant or a gradually increased applied normal load. The wear-scan methodology has rendered several immediate advantages over the conventional micro-scratch technique, offering features such as a much larger testing area thus facilitating the failure and morphology analyses afterwards, the possibility of studying the wear debris generation and the flexibility in testing characteristics. Two thin film disks with different hydrogenated carbon overcoats have been tested by using the micro-wear scan technique. The results in the mechanical measurements, the wear processes and the morphology evolution are illustrated and discussed.

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