To reduce the stiction between a magnetic disk and a flying slider carrying a magnetic head in a hard disk drive, the slider was subjected to surface treatment. Namely, the slider was dipped in 1 mass% FAS solution (2- (heptadecafluorooctyl) - ethyltrimethoxysilane) and heated to 393 K (i.e., a dipping/ heating process). The mineral-oil contact angle on the slider after this treatment was 72 degrees. A read/write test was performed with the treated slider, and the stiction force on the treated slider was found to be decreased by about 80%, compared with that of an untreated slider. This result confirmed that the surface treatment effectively reduces stiction. Moreover, by irradiating the slider surface with ultraviolet light before the dipping/heating process, the contact angle was increased to about 80 degrees. It is also confirmed that ultraviolet light irradiation effectively reduces the stiction between the slider and disk.