DocumentCode :
84362
Title :
Restoration of Broadband Inductor and Transformer Performance After Ferrite Grinding
Author :
Bowen, David ; Lee, Andrew ; Krafft, Charles ; Mayergoyz, Isaak D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Maryland, College Park, MD, USA
Volume :
6
fYear :
2015
fDate :
2015
Firstpage :
1
Lastpage :
4
Abstract :
For broadband inductor and signal transformer applications, ferrite core materials deliver the best magnetic performance. For low-profile circuit-board applications, ferrite materials must be ground to the proper thickness to fit within the desired form factor. Ferrite grinding, however, will result in mechanical stresses in the ferrite, reducing the material permeability. In this study, three methods of restoring ferrite permeability after grinding were surveyed (etching, polishing, and annealing) on three different ferrite materials. Advantages and disadvantages of the three techniques are discussed, though it has been found that only etching and polishing were effective in permeability restoration; annealing, by means carried out in this study, reduced the ferrite permeability.
Keywords :
etching; ferrites; grinding; inductors; magnetic annealing; magnetic cores; magnetic permeability; polishing; pulse transformers; stress analysis; annealing; broadband inductor restoration; etching; ferrite core material; ferrite grinding; form factor; low-profile circuit-board application; magnetic performance; material permeability; mechanical stress; polishing; signal transformer performance; Annealing; Etching; Ferrites; Magnetic field measurement; Permeability; Windings; Broadband communication; Ferrite devices; Ferrites; Inductors; Soft magnetic materials; Transformer cores; Transformers; broadband communication; ferrite devices; ferrites; inductors; transformer cores; transformers;
fLanguage :
English
Journal_Title :
Magnetics Letters, IEEE
Publisher :
ieee
ISSN :
1949-307X
Type :
jour
DOI :
10.1109/LMAG.2015.2407312
Filename :
7052342
Link To Document :
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