Investigation of X-1P coating on magnetic head to enhance the stability of head/disk interface

Stable lubrication is essential to slider/disk interface of computer hard disk drive. Inert lubricant perfluoropolyether (PFPE) on magnetic hard disk in computer is still prone to catalytic decomposition by Al2O3, which is one of the materials in slider. A partial fluorinated hexaphenoxy cyclotriphosphazene chemical, X-1P, was analyzed to research on its function to reduce the catalytic decomposition of lubricant. The surface free energy of X-1P coated on head surface was also investigated. Contact start-stop (CSS) tester was employed to investigate the reflow effective of X-1P on lubricant PFPE. Results indicate that thermal stability and reflow of lubricant will be improved in the presence of X-1P on the slider.