PCB embedded bondwire inductors with discrete thin film magnetic core for power supply in package

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Kulkarni, Santosh
Li, Dai
Jordan, Declan
Wang, Ningning
Ó Mathúna, S. Cian
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Institute of Electrical and Electronics Engineers (IEEE)
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This paper details the design, assembly, and detailed characterization of Printed Circuit Board (PCB) embedded thin magnetic film inductor for Power Supply in Package applications. Solenoidal inductors were assembled on copper tracks printed on PCB with wire bonds to complete the copper loop. Further, the solenoid inductors have laminated amorphous soft magnetic thin films embedded between the two conductor layers. The devices have chemically thinned Vitrovac films laminated as core material. Three different designs of solenoid inductors with different number of turns, are assembled and characterized. The assembled PCB inductor measured a highest Quality factor of 8.5 for a 3 turn device at 10 MHz.
Copper , Inductance , Inductors , Magnetic cores , Magnetic films , Wires , PCB based Magnetic devices , Integrated circuits , Power conversion , Power inductors , Switched-mode power supply , Thin film magnetic core
Kulkarni, S., Li, D., Jordan, D., Wang, N. and O’Mathuna, C. (2018) 'PCB Embedded bondwire inductors with discrete thin film magnetic core for Power Supply in package', IEEE Journal of Emerging and Selected Topics in Power Electronics, 6(2), pp. 614-620. doi: 10.1109/JESTPE.2018.2799238
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