2311 Changes in Friction Properties of Thin Lubricant Films on Magnetic Disks Accompanying with the Formation of Bonded Molecules

2007 ◽  
Vol 2007 (0) ◽  
pp. 257-259
Author(s):  
Yosuke FUJIKAWA ◽  
Akira FUWA ◽  
Hedong ZHANG ◽  
Yasunaga MITSUYA ◽  
Yinbo HE ◽  
...  
Keyword(s):  
Magnetic Disks ◽  
Lubricant Films

Direct Visualization of Molecularly Thin Lubricant Films on Magnetic Disks by Ellipsometric Microscopy With a White Light Source

2004 ◽  
Author(s):  
Kenji Fukuzawa ◽  
Akira Nakada ◽  
Yasunaga Mitsuya ◽  
Hedong Zhang
Keyword(s):  
Light Source ◽  
White Light ◽  
Theoretical Calculations ◽  
Direct Visualization ◽  
Magnetic Disks ◽  
White Light Source ◽  
Lubricant Films ◽  
Real Time Visualization ◽  
Molecularly Thin Lubricant ◽  
Conventional Laser

We demonstrated the direct visualization of molecularly thin lubricant films on magnetic disks with a thickness resolution of 0.1 nm by using an ellipsometric microscope with a white light source. It was able to reduce the optical interference noise that arises in conventional laser-based ellipsometric microscopes, and to provide a large SNR by a factor of about 6 compared to a laser-based ellipsometric microscope. The wavelength width should be given the first priority in designing a white light source ellipsometric microscope, and the width should be determined after considering the required coherence length and thickness resolution. Theoretical calculations indicate that a wavelength width of less than 10 nm can provide a thickness resolution of 0.1 nm. A white light source ellipsometric microscope can provide real-time visualization of a molecularly thin lubricant film with a thickness resolution of 0.1 mm, which is useful in investigating the kinetic behavior of molecularly thin lubricant films on magnetic disks.

Development of a Ball-Suspension Assembly for Measuring Speed-Dependent Friction Characteristics of Thin Lubricant Films Coated on Magnetic Disks

2014 ◽  
Vol 50 (11) ◽  
pp. 1-4 ◽  
Author(s):  
Yasunaga Mitsuya ◽  
Hedong Zhang ◽  
Katsuya Namba ◽  
Kenji Fukuzawa ◽  
Shintaro Itoh
Keyword(s):  
Magnetic Disks ◽  
Friction Characteristics ◽  
Lubricant Films

3412 Measurements of Adhesive Force and Elongation of Nanometers-Thick Lubricant Films on Magnetic Disks Using Micro Probe for SPM

2007 ◽  
Vol 2007.5 (0) ◽  
pp. 335-336
Author(s):  
Yasuji OHSHIMA ◽  
Masayuki WATANABE ◽  
Takashi SUMI ◽  
Hedong ZHANG ◽  
Kenji FUKUZAWA ◽  
...  
Keyword(s):  
Adhesive Force ◽  
Magnetic Disks ◽  
Lubricant Films
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