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

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

Kulkarni, Santosh; Li, Dai; Jordan, Declan; Wang, Ningning; Ó Mathúna, S. Cian
Date: 2018-01-29
Copyright: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Citation: 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
Published Version: 10.1109/JESTPE.2018.2799238

Abstract:

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.

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