Method to detect helium leakage from a disk drive

Details Method to detect helium leakage from a disk drive Method to detect helium leakage from a disk drive

2007-08-01

2008-10-14

Verbitsky, Gail (Department: 2855)

Thermal measuring and testing

Leak or flaw detection

C374S185000, C374S141000

Reexamination Certificate

active

07434987

ABSTRACT:
A method to detect helium leakage from a disk drive enclosure is disclosed and claimed. A measurement electrical current is passed through a temperature sensor disposed within the disk drive enclosure. A reference electrical resistance corresponds to a reference temperature of the temperature sensor. A heating electrical current is passed through the temperature sensor. A heated electrical resistance of the temperature sensor, corresponding to a heated temperature of the temperature sensor that exceeds the reference temperature by at least 5° C., is determined. A value that corresponds to a quantity of helium within the disk drive enclosure is determined based on the reference electrical resistance and heated electrical resistance.

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