NDLI: Small-Resistance and High-Quality-Factor Magnetic Integrated Inductors on PCB

Content Provider	IEEE Xplore Digital Library
Author	Liangliang Li Dok Won Lee Kyu-Pyung Hwang Yongki Min Hizume, T. Tanaka, M. Ming Mao Schneider, T. Bubber, R. Wang, S.X.
Copyright Year	1999
Abstract	We have designed and fabricated both single-coil and parallel-coil magnetic integrated inductors with extremely small resistances and high quality factors on an 8-in-round printed circuit board (PCB) substrate for microprocessor power delivery applications. The dc resistances of these inductors are less than 12 mOmega. Soft magnetic material CoFeHfO was successfully integrated into the inductor fabrication to increase the inductance. The quality factors are more than 80 in a frequency range of 1.5-2 GHz for air-core inductors and more than 23 in a range of 200-300 MHz for magnetic inductors. The net inductance improvement of the magnetic inductor over air-core inductor is about 12%, which could be further enhanced with a thicker magnetic core, according to our theoretic calculation and HFSS simulation. We also characterized the permeability spectra of CoFeHfO material on the PCB substrate, simulated the high-frequency performance of the magnetic integrated inductor by HFSS, and, for the first time, reached a good agreement with the experimental data. The experimental and simulation results of the magnetic inductors as compared to those of the air-core inductors point out the future direction to further optimize magnetic integrated inductors.
Sponsorship	IEEE Components, Packaging, and Manufacturing Technology Society IEEE Components, Packaging and Manufacturing Technology Society
Starting Page	780
Ending Page	787
Page Count	8
File Size	1347485
File Format	PDF
ISSN	15213323
Volume Number	32
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-11-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Inductors Soft magnetic materials Q factor Inductance Magnetic materials Printed circuits Microprocessors Fabrication Frequency Magnetic cores printed circuit board High-frequency simulation magnetic integrated inductor permeability
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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