Hall Sensors and Their Application

Abstract

More than 24 billion high-sensitivity InSb thin-film Hall elements with the ferrite sandwich structure have been fabricated and applied over the last 30 years. The technologies and application of the high-sensitivity thin-film Hall elements or Hall sensors are discussed in conjunction with present and historical status. They have been used to develop many kinds of very small DC brushless, or Hall motors and also have been applied to many key devices such as contactless sensors, switches, current sensors and many kinds of home-use electrical systems and car sensors. More than 90% Hall elements were used to fabricate Hall motors which were strongly required from electronic and information systems developed mainly at the final 20 years term of last twenty century.