Magnetic emission mapping for passive integrated components characterisation

摘要

We developed a system and a method to characterize the magnetic field induced by circuit boards and electronic components, especially integrated inductor, with magnetic sensors. The different magnetic sensors are presented and several applications using this method are discussed. Particularly, in several semiconductor applications (e.g. mobile phone), active dies are integrated with passive components. To minimize magnetic disturbance, arbitrary margin distances are taken. We present a system to characterize precisely the magnetic emission to insure that the margin is sufficient and to reduce the size of the board.