Magnetic disk storage device

PURPOSE: To largely suppress the number of impurity molecules adsorbed to the surface of a treated device with preferable species of molecules. CONSTITUTION: In one example of use of this invention, a rigid disk type magnetic data storage device is presented. The device requires a monomolecular layer of a lubricant on the surface of a disk and a slider. A vapor drain 6 traps impurity molecules from the atmosphere to suppress the number of contaminants. A desired lubricant is used as a material having very low vapor pressure which can remain on the disk surface 4 for a long time, and the lubricant enters into the vapor drain 6 at a small velocity. Or else, a lubricant having rather high vapor pressure is supplied from a reservoir 3 through a vapor phase. The molecules enter the vapor drain 6 at a high speed so the reservoir 3 is required to supply molecules into air for rather high speed than the supply rate from the contamination source. In any case, the vapor drain 6 decreases contamination on the surface in a packaged body. COPYRIGHT: (C)1993,JPO