Giant magnetoresistance sensor performance testing device

Abstract

The invention discloses a giant magnetoresistance sensor performance testing device which is characterized by comprising a bottom plate, an objective table, a central regulator, a square coil and a square coil position regulator, and a rack is mounted on the bottom plate, and the objective table is matched with the rack and can be transversely regulated along the rack; the objective table is provided with a clamping mechanism capable of clamping the giant magnetoresistance sensor; the central regulator is connected with the objective table and can transversely adjust the position of the objective table; the square coil is mounted on the square coil position regulator; the square coil position regulator is matched with the bottom plate rack, the distance between the square coils is adjustedthrough the handle according to the actual test condition, and therefore the effect of changing the magnetic field is achieved, and the actual use range of the giant magnetoresistance sensor performance test device is widened. According to the invention, the square coils can be adjusted, a magnetic field more conforming to actual conditions is provided, the test accuracy is improved, the structure is simple, and the operation is convenient.

Description

technical field [0001] The invention relates to the technical field of giant magnetoresistance sensor testing, in particular to a giant magnetoresistance sensor performance testing device. Background technique [0002] Giant magnetoresistance, also known as super magnetoresistance, or GMR (GiantMagnetoResistance), is more than 2 times more sensitive than the AMR technology head. The GMR head is composed of 4 layers of conductive material and magnetic material film: a sensing layer, a non-conductive intermediary layer , a magnetic pin layer and an exchange layer. Simply put, when there is a magnetic field around the giant magnetoresistance, the resistance of the giant magnetoresistance will drop sharply, and the giant magnetoresistance sensor needs to be tested for anti-interference during the manufacturing process. [0003] The giant magnetoresistive sensor performance test device on the market is not convenient to adjust the magnetic field according to the actual situation...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a giant magnetoresistive sensor performance test device to solve the problem that the giant magnetoresistive sensor performance test device proposed in the above background technology is not convenient to adjust the magnetic field according to the actual situation, and the test range is limited to a certain extent. It has the characteristics of generating a high uniformity magnetic field, and the uniformity of the magnetic field has an impact on the test results

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