| 摘要 |
<p>PURPOSE:To realize mass-production of disk substrates having uniform qualities by forming rough surfaces due to difference of growth of plating material in an epitaxial method which utilizes the difference of physical/chemical properties between the substrate and the fillers in the pores of alumite. CONSTITUTION:The pores in alumite of aluminum or aluminum alloy are filled with such material having different physical/chemical properties from alumite. It is then treated by an epitxial method, which forms fine roughness on the surface due to the difference in physical/chemical properties between the substrate and the filler in the alumite. The roughness pattern almost corresponds to the positions and sizes of the pores. Thus, the rough surface is uniformly obtained and a preferable coefficient of friction against a magnetic head can be obtained under proper condition of roughness height. Thereby, a regular two-dimensional pattern of fine roughness can be provided uniformly on the substrate surface and the substrate has a sliding property which does not cause crushing of a head.</p> |
