Multi-terminal inductor for integrated circuit
First Claim
1. A multi-terminal inductor, comprising:
- a semiconductor substrate;
an interconnect structure having a plurality of metal layers disposed over the semiconductor substrate;
a first magnetic layer disposed over an uppermost surface of the interconnect structure;
a conductive wire disposed over the first magnetic layer;
a first input/output (I/O) bond structure that branches off of the conductive wire at a first location;
a second I/O bond structure that branches off of the conductive wire at a second location, the second location being spaced apart from the first location; and
a third I/O bond structure that branches off of the conductive wire at a third location between the first location and the second location, wherein a connection between the third I/O bond structure and the first I/O bond structure has a first inductance and an alternative connection between the first I/O bond structure and the second I/O bond structure has a second inductance that is greater than the first inductance.
1 Assignment
0 Petitions
Accused Products
Abstract
A multi-terminal inductor and method for forming the multi-terminal inductor are provided. In some embodiments, an interconnect structure is arranged over a semiconductor substrate. A passivation layer is arranged over the interconnect structure. A first magnetic layer is arranged over the passivation layer, and a conductive wire laterally extends from a first input/output (I/O) bond structure at a first location to a second I/O bond structure at a second location. A third I/O bond structure branches off of the conductive wire at a third location between the first location and the second location. A connection between the third I/O bond structure and the first I/O bond structure has a first inductance. Alternatively, a connection between the first I/O bond structure and the second I/O bond structure has a second inductance different than the first inductance.
21 Citations
20 Claims
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1. A multi-terminal inductor, comprising:
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a semiconductor substrate; an interconnect structure having a plurality of metal layers disposed over the semiconductor substrate; a first magnetic layer disposed over an uppermost surface of the interconnect structure; a conductive wire disposed over the first magnetic layer; a first input/output (I/O) bond structure that branches off of the conductive wire at a first location; a second I/O bond structure that branches off of the conductive wire at a second location, the second location being spaced apart from the first location; and a third I/O bond structure that branches off of the conductive wire at a third location between the first location and the second location, wherein a connection between the third I/O bond structure and the first I/O bond structure has a first inductance and an alternative connection between the first I/O bond structure and the second I/O bond structure has a second inductance that is greater than the first inductance. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A multi-terminal inductor, comprising:
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a semiconductor substrate; an interconnect structure having a plurality of metal layers disposed over the semiconductor substrate; a passivation layer disposed over an uppermost surface of the interconnect structure; a magnetic layer disposed over the passivation layer; a plurality of inductor units including a plurality of conductive wires, respectively, spaced apart from one another and arranged over the magnetic layer, wherein a first inductor unit of the plurality of inductor units includes a dielectric layer extending over a first conductive wire of the first inductor unit and includes a first terminal and a second terminal that extend through the dielectric layer to provide electrical connections to the first conductive wire of the first inductor unit; and a connection structure disposed over the dielectric layer and having conductive traces electrically coupled to the first and second terminals, wherein the connection structure electrically couples some, but not all, of the plurality of inductor units in series with one another. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method, comprising:
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forming an interconnect structure having a plurality of metal layers over a semiconductor substrate; forming a passivation layer over an uppermost surface of the interconnect structure; forming a first magnetic layer over the passivation layer; forming a plurality of conductive wires spaced apart from one another over the first magnetic layer; forming a dielectric layer over the plurality of conductive wires; forming a plurality of solder bumps over the dielectric layer, wherein different solder bumps of the plurality of solder bumps are electrically coupled to different conductive wires; and selectively connecting a printed circuit board (PCB) having conductive traces to some, but not all, of the plurality of solder bumps.
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Specification