Batch-type millimeter-size transformers for miniaturized power applications

Citation
F. Amalou et al., Batch-type millimeter-size transformers for miniaturized power applications, IEEE MAGNET, 37(4), 2001, pp. 2999-3003
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON MAGNETICS
ISSN journal
00189464 → ACNP
Volume
37
Issue
4
Year of publication
2001
Part
2
Pages
2999 - 3003
Database
ISI
SICI code
0018-9464(200107)37:4<2999:BMTFMP>2.0.ZU;2-Y
Abstract
We have developed a novel batch-type technology for making three-dimensiona l (3-D) millimeter-sized transformers for ultrasmall low-power (0.1 to 1 Wa tt) applications. The technology uses the 3-D micropatterning of ferrite wa fers by powder blasting to form the magnetic cores of the inductive devices , and combines these cores with electrical windings made by flex-foil print ed circuit board technology. Microfabrication and assembly of the parts can be done in a batch process on a wafer/foil level, opening the way to furth er size reduction of the components. We have measured the inductive and res istive properties of our devices as a function of frequency and device geom etry. The results clearly show the high potential of our technology for pow er applications in which small-size is important.