Inductor structures for integrated circuits
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United States of America Patent
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Nov 13, 2018
Grant Date -
Oct 1, 2015
app pub date -
Mar 23, 2015
filing date -
Mar 26, 2014
priority date (Note) -
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Abstract
Multiple intertwined inductor coils combine to form one or more transformer devices of a semiconductor device. The intertwined inductor coils are formed of only two metallization layers and vias coupling the layers. The inductor coils are vertically oriented and include a magnetic axis parallel to the substrate surface. A plurality of metal wires are provided on both a first device level and a second device level. Each of the metal wires on the first device level is coupled to two wires on the second device level and forms a first inductor coil. The two metal wires on the second device level that form part of the first inductor coil, are separated by a third wire that is coupled to two different first device level metal wires and forms part of a different second inductor coil intertwined with the first inductor coil.
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