Magnetic Shielding Design for Magneto-Electronic Devices Protection

With the rapid progress in magnetic random access memory (MRAM) development, shielding for MRAM and other magneto-electronics devices becomes more and more important. Traditionally, magnetic shielding is done by cylindrical shells with length to diameter ratio greater than one. Such shielding shapes are not compatible with the form factor of electronic chips, boards, or systems. Novel magnetic shielding designs with low length to diameter ratio are needed. In this paper, we introduce a shielding strategy for magneto-electronic devices and demonstrate a case study to achieve shielding factor above 1000 with cylindrical shell length to diameter ratio below 0.3 and with end-cap openings for signal and power bus connections.