磁性传感器：全集成型产品需求量急剧增大

Magnetic Sensors:Demand for All-In-One Type ICs is Quickly Expanding with Competition Focused on Dimensions and Allowing Freedom in Design

磁性传感器通常配置于使用小型磁铁工作的物体上，用于捕获磁场的强度及其变化，以检测出物体的接近、移动或旋转等行为。磁性传感器的工作原理与同样检测磁场的地磁（方位）传感器及以前用于磁带的磁头等相类似，但其可检测的磁通密度的高低不同（见图1）。

The market for magnetic sensors, which have a long history,has expanded considerably recently, spurred by such applications as detecting the opening and closing of flip-style mobile phones.Magnetic sensors are steadily becoming smaller and thinner products have emerged with a 1mm^2 surface and around 0.4mm thickness.With a growing number of companies manufacturing magnetic sensors, this article explains the criteria for selection and the characteristics of enabling technologies.