Batch-Type Millimeter-Size Transformers for Miniaturized Power Applications

We have developed a novel batch-type technology for making three-dimensional (3-D) millimeter-sized transformers for ultrasmall low-power (0.1 to 1 Watt) applications. The technology uses the 3-D micropatterning of ferrite wafers by powder blasting to form the magnetic cores of the inductive devices, and combines these cores with electrical windings made by flex-foil printed 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 further size reduction of the components. We have measured the inductive and resistive properties of our devices as a function of frequency and device geometry. The results clearly show the high potential of our technology for power applications in which small-size is important.


Published in:
IEEE Trans. Magn., 37, 4, 2999-3003
Year:
2001
Laboratories:




 Record created 2005-10-26, last modified 2018-03-17

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