A magnetic transfer apparatus writing a servo signal by magnetically transferring to a magnetic recording medium, and an optical type inspection apparatus for optically inspecting scratch or foreign matter on the magnetic recording medium wherein a characteristic grease is used for these apparatuses are disclosed. Grease used in the magnetic transfer apparatus or the optical type inspection apparatus generates sulfur type gas in amount less than or equal to 0.5 ppb.
本发明公开了一种通过磁性传输到磁性记录介质来写入伺服信号的磁性传输装置,以及一种用于光学检测磁性记录介质上的划痕或异物的光学式检测装置,这些装置使用了一种特性润滑脂。 磁性传输装置或光学式检测装置中使用的润滑脂会产生
硫磺类气体,其含量小于或等于 0.5 ppb。