Patent ID: 9689763
Date: 2017-06-27
CPC Classifications: G01L,G01R

Claim:
1. A magnetic detection device, comprising: a first magnetic collector that includes a first collector portion; a second magnetic collector that includes a second collector portion, the second collector portion facing the first collector portion from a fixed distance away; a substrate having an outer edge, a cutout portion being formed in the substrate and opening at the outer edge; and a plurality of magnetic sensors, a particular magnetic sensor of the plurality of magnetic sensors including a magnetic detection element, a mold section, and a terminal, the plurality of magnetic sensors being surface mounted on a same side of the substrate such that at least a portion of the mold section of the particular magnetic sensor overlaps the cutout portion, wherein the magnetic detection element detects a magnetic field formed by the first collector portion and the second collector portion, the mold section encapsulates the magnetic detection element, the terminal protrudes from the mold section and is connected to the substrate, the first collector portion is positioned to face a front surface of the particular magnetic sensor, the front surface facing away from the substrate, at least a portion of the second collector portion is positioned in the cutout portion to face a rear surface of the particular magnetic sensor, the rear surface facing toward the substrate, a first air gap is disposed between the first collector portion and the front surface of the particular magnetic sensor, and a second air gap is disposed between the second collector portion and the rear surface of the particular magnetic sensor.