Method for making a planar inductor/transformer in a laminated printed circuit board
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United States of America Patent
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app pub date -
Aug 29, 2001
filing date -
Feb 21, 2000
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Abandoned
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Abstract
A method for making a planar inductor is disclosed. The inductor is made by using a core with high magnetic flux. Outside the substrate, a layer of insulator and conductive foil is securely mounted. Thereafter, copper traces are formed on the insulator. Before the copper traces are formed, holes are defined and metalized to provide electrical connection between conductive foils on opposite sides of the core, which forms a planar inductance. Furthermore, if the copper traces are breaking up in a predetermined location, the planar inductance becomes a transformer.
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