Sensing unit for magnetic resistance spinning valves temperature control switch

A temperature-controlled switch, spin valve technology, applied in temperature control, non-electric variable control, instruments, etc., can solve problems such as inability to CMOS circuits, unchangeable, and inability to freely set temperature thresholds
CN1603995AActive Publication Date: 2005-04-06INST OF PHYSICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF PHYSICS - CHINESE ACAD OF SCI
Publication Date
2005-04-06

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Abstract

This invention discloses a magnetic resistance spin valve switch sensor, which comprises one base, one comparator, one isolation layer and one fixed conductor. The base is formed with two spin valve elements between which and conductor there located the isolation layer. The magnetic field of the spin valve element resistance changes are controlled through the current of fixed conductor. It compares the two spin valve elements resistance and outputs signal when the two resistance values are unequal.
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Description

technical field

[0001] The invention relates to a temperature control switch sensor made by using a giant magnetoresistance (GMR) spin valve. Background technique

[0002] The coercive force of many ferromagnetic materials is related to temperature, and generally decreases gradually with the increase of temperature. There are many related documents, such as Appl.Phys.Lett.Vol 77, 2731, 2000 mentioned in giant magnetic Co commonly used in resistance optional valve material. Such a method is described in a patent (Application No. 95105085.0) published by IBM Corporation of the United States, that is, a conductive fixed layer is formed on the substrate to insulate from the respective spin valve elements. At present, the temperature sensors on the market mainly include diode temperature detectors, which are mainly used to monitor and protect the CPU in computers (typically MaximIntegrated Products MAX6511 / MAX6512, MAX1617, etc.), generally used in notebook computers, desktop PC...

Claims

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