Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Reexamination Certificate
2008-02-20
2010-10-19
Verbitsky, Gail (Department: 2855)
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
C374S178000, C324S760020, C324S252000, C428S811000, C029S603090, C360S313000
Reexamination Certificate
active
07815369
ABSTRACT:
A method of measuring temperature of a TMR element includes a step of obtaining in advance a temperature coefficient of element resistance of a discrete TMR element that is not mounted on an apparatus, by measuring temperature versus element resistance value characteristic of the discrete TMR element in a state that a breakdown voltage is intentionally applied to the discrete TMR element and a tunnel barrier layer of the discrete TMR element is brought into a stable conductive state, a step of bringing a tunnel barrier layer of a TMR element actually mounted on the apparatus into a stable conductive state by intentionally applying the breakdown voltage to the mounted TMR element having the same structure as that of the discrete TMR element whose temperature coefficient has been measured, a step of measuring an element resistance value of the mounted TMR element with the tunnel barrier layer that has been brought into a stable conductive state, and a step of obtaining a temperature corresponding to the measured element resistance value from the previously measured temperature coefficient of element resistance.
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Antoku Yosuke
Chung Luke
Leung Eric
Tse Man
Oliff & Berridg,e PLC
TDK Corporation
Verbitsky Gail
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