CUSTOMIZED SMD POWER INDUCTOR AND METHOD OF MANUFACTURING THE SAME
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United States of America Patent
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Issued Date -
May 11, 2017
app pub date -
Nov 6, 2015
filing date -
Nov 6, 2015
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Abstract
A customized SMD power inductor includes a magnetic substrate, a coil structure, a magnetic coating structure, and a terminal electrode structure. The coil structure is disposed on the magnetic substrate. The magnetic coating structure is disposed on the magnetic substrate to cover the coil structure. The magnetic coating structure includes a middle coating layer and a top coating layer, and the middle coating layer has a middle filling portion and a surrounding perimeter portion. The magnetic substrate has a first predetermined relative permeability, the surrounding perimeter portion has a second predetermined relative permeability, the middle filling portion has a third predetermined relative permeability, and the top coating layer has a fourth predetermined relative permeability. The electrical property of the customized SMD power inductor is adjusted according to numerical values of the first, the second, the third, and the fourth predetermined relative permeability.
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