Contributed Papers
Characterization of a Lubricant Film in a Wearing Region a Thin-Film Magnetic Recording Disk by Time-of-Flight Secondary Ion Mass on Spectrometry
1995 Volume 19 Issue 1 Pages 56-60
Details
1995 Volume 19 Issue 1 Pages 56-60
Lubricants on a thin-film magnetic recording disk were analyzed by using TOF-SIMS. The lubricants used were Fomblin-AM2001, Fomblin-Z. DOL, Fomblin-Z, DEAL, Fomblin-Z. DIAC, Krytox-143AD, and Krytox-157FSH of perfluoropolyether.The main structures of Fomblin and Krytox were distinguished by a negative mass fragment pattern and a peak height ratio of m/z = 69 (CF3+) : m/z =119 (C2F5+). The end groups of Fomblin-AM2001, Fomblin-Z. DOL and Fornblin-Z. DIAC were detected by means of the fragment ions of the end groups. Damage to the lubricant film in the wearing region on the disk was then investigated by using TOF-SIMS. As a result, it was considered that the main structures were decomposed more than the end groups, when the head contacted the lubricant film.These results showed that the sensitivity and resolution of TOF-SIMS was higher than that of quadruple static SIMS. It was found that the TOF-SIMS measurement provides useful information on the durability of a thin-film magnetic recording disk.
