Patent ID: 9702943
Date: 2017-07-11
CPC Classifications: G01R

Claim:
1. A single chip push-pull bridge-type magnetic field sensor, comprising: a substrate in an XY plane, wherein the XY plane is defined by coordinate axes, an X axis and a Y axis; at least one push arm consisting of one or more magnetoresistance sensing elements; at least one pull arm consisting of one or more magnetoresistance sensing elements; multiple push arm flux concentrators and pull arm flux concentrators disposed on the substrate, and certain clearances are provided between every two of the multiple push arm flux concentrators and between every two of the multiple pull arm flux concentrators, wherein an included angle between the push arm flux concentrators and the X-axis forward direction is positive while an included angle between the pull arm flux concentrators and the X-axis forward direction is negative, or an included angle between the push arm flux concentrators and an X-axis forward direction is negative while an included angle between the pull arm flux concentrators and the X-axis forward direction is positive; magnetization directions of magnetic pinning layers of the magnetoresistance sensing elements are identical; the magnetoresistance sensing elements are respectively located at the clearances between two adjacent push arm flux concentrators or two adjacent pull arm flux concentrators correspondingly, to detect a difference value of components of magnetic fields between the push arm flux concentrators and the pull arm flux concentrators in the direction of the X axis; and a microelectronic electrical connection and packaging method is used to interconnect the magnetoresistance sensing elements into a push-pull bridge and form input and output connections.