Enhanced tribological performance of rigid disk by using chemically bonded lubricant

DOI PDF 1 Citations
  • H. J. Lee
    Conner Disk Division, Milpitas, California 95035
  • R. Zubeck
    Conner Disk Division, Milpitas, California 95035
  • D. Hollars
    Conner Disk Division, Milpitas, California 95035
  • J. K. Lee
    Conner Peripherals, San Jose, California 95134
  • A. Chao
    Conner Peripherals, San Jose, California 95134
  • M. Smallen
    Conner Peripherals, San Jose, California 95134

Abstract

<jats:p>Nonreactive perfluoropolyether lubricants were processed by ultraviolet (UV) radiation to make them chemically bonded to thin film magnetic disks. The tribological performance of these disks was then investigated. Disks with a range of 30–50 Å thick perfluoropolyether lubricant, were treated by using the different sources of UV radiations in air, argon, and nitrogen atmospheres. By changing the power density from 40 mW/cm2 to 50 W/cm2 and UV wavelength 185 to 365 nm, in either dry nitrogen or argon gas, a maximum of 38 Å of lubricant was chemically bonded to the thin film disks. Stiction and friction forces during 1 rpm testing were dramatically decreased with the increase in UV exposure time. Contact-start-stop test performance of disks with ∼15%–30% of chemically bonded lubricant was also significantly enhanced. An optimum amount of chemically bonded lubricant provides excellent tribological performance for thin film disks.</jats:p>

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