Abstract
The collision density of the evaporated lubricant molecules in the air with the hard disk surface was analyzed. It is found that the adsorption of the collided molecules may have significant contribution to the lubricant film replenishment, especially when the depleted area size is larger than 01. mm and the activation energy is high as in the immobile layer. It is proposed that the replenishment is carried out through and adsorbing-spreading mechanism.
