MULTILAYER POWER INDUCTOR USING SHEETS CHARGED WITH SOFT MAGNETIC METAL POWDER
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United States of America Patent
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Issued Date -
Dec 9, 2010
app pub date -
Mar 3, 2009
filing date -
Mar 11, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention relates to a multilayer power inductor in which sheets are charged with a soft magnetic metal alloy powder having a shape optimized along a magnetic path, pattern circuits made from conductive materials are formed on the sheets, and via holes are formed through the sheets to easily connect pattern circuits. The power inductor of the present invention is manufactured by stacking the above-described sheets into multiple layers. The sheets of the inductor of the present invention are charged with soft magnetic metal powder having a high magnetization density, and fine gaps are distributed among the powder the shape of which is optimized along a magnetic path to ensure high current superposition characteristics which allow the use of 1A to several tens of A without causing leakage flux, and ensure stable inductance to a high frequency domain of the 10 MHz band. Further, the present invention is advantageous as it provides an inductor with a thin width, a large area, high inductance and high direct current superposition characteristics.
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