By Topic

Effect of patterned magnetic shields on high-frequency integrated inductors

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Crawford, A.M. ; Dept. of Mater. Sci. & Eng., Stanford Univ., CA, USA ; Wang, Shan X.

Understanding the losses in magnetic integrated inductors is essential for attaining optimal performance. Integrated inductors with thick magnetic shield (MS) with eddy current inhibiting slots were fabricated to understand the losses due to the MS, patterning, and eddy currents. An increase in the quality factor was measured for inductors with patterned magnetic shields. We further measured a) only a partial inhibition of eddy currents in films, and b) an increased in the expected frequency response of the magnetic material (in-situ). We found that patterning the MS with wide patterns (36 μm wide) is not entirely sufficient for eliminating eddy currents, and the pattern should be refined; however studies of arrays of bars show that refining the pattern leads to dramatically different high frequency behavior that must be accounted for when optimizing the quality factor.

Published in:

Magnetics, IEEE Transactions on  (Volume:40 ,  Issue: 4 )