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US 7,350,400 B1Granted
Test method to measure lubricant mobility on a hard drive disk
AssigneeSamsung Electronics Co., Ltd.
InventorChao Yuan Chen
Life of this patent
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Abstract
A method for measuring the mobility of a lubricant located on the top surface of a disk used in hard disk drives. The method includes forming one or more scribe lines in a lubricant layer of the disk. The disk is then spun by a spin stand where lubricant moves in response to the centrifugal forces of the spinning disk. The disk is removed from the spin stand and the height of lubricant that moved into the scribe line is measured to determine lubricant mobility.
Claims6
A method to determine the mobility of a lubricant located on a disk used in a hard disk drive, comprising:
- creating at least one scribe line in a lubricant of a lubricant layer on a surface of a disk, the scribe line having a predetermined depth;
- spinning the disk;
- measuring a height of lubricant that moves into the scribe line of the disk;
- and
- determining lubricant mobility based on the predetermined depth of the scribe line and the measured lubricant height.
2 more elements
Dependencies are inferred from the claim text.