Title:
MAGNETO-RESISTANCE SENSOR WITH ENCAPSULATION OF INITIALIZATION COIL
Document Type and Number:
WIPO Patent Application WO/2017/177877
Kind Code:
A1
Abstract:
A magneto-resistance sensor with encapsulation of an initialization coil, comprising an encapsulation structure, at least one set of sensor slices (5), a spiral initialization coil (4), a lead bonding pad (2), an ASIC-specific integrated circuit (3) and an encapsulation layer, wherein the spiral initialization coil (4) is arranged on a PCB substrate (1) of the encapsulation structure; each set of sensor slices (5) comprises two sensor slices (5); each sensor slice (5) comprises two sets of magneto-resistance sensing unit series, and the magneto-resistance sensing unit series located on the sensor slice (5) is connected to form a magneto-resistance sensing unit electrical bridge; the ASIC-specific integrated circuit (3) and the magneto-resistance sensing unit electrical bridge are electrically connected; the sensor slices (5) are located above the spiral initialization coil (4), and are respectively arranged surrounding the spiral initialization coil (4); and the lead bonding pad (2) and the ASIC-specific integrated circuit (3) are electrically connected. The sensor reduces the sensor hysteresis lag and offset generated due to the magnetic domain of a flux concentrator, is low in cost, and is easy to manufacture.
Inventors:
DEAK JAMES GEZA (CN)
ZHANG XIAOJUN (CN)
ZHANG XIAOJUN (CN)
Application Number:
PCT/CN2017/079948
Publication Date:
October 19, 2017
Filing Date:
April 10, 2017
Export Citation:
Assignee:
MULTIDIMENSION TECHNOLOGY CO LTD (CN)
International Classes:
G01R33/09
Foreign References:
| CN205581283U | 2016-09-14 | |||
| CN1503001A | 2004-06-09 | |||
| CN102483443A | 2012-05-30 | |||
| CN102298125A | 2011-12-28 | |||
| CN102540113A | 2012-07-04 | |||
| US20040189292A1 | 2004-09-30 |
Other References:
See also references of EP 3444627A4
Attorney, Agent or Firm:
SCIHEAD PATENT AGENT CO., LTD. (CN)
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