Stacked RF circuit topology
An integrated circuit device package includes a substrate, a first die comprising active electronic components attached to the substrate, and package leads configured to conduct electrical signals between the first die and an external device. At least one integrated interconnect structure is provided on the first die opposite the substrate. The at least one integrated interconnect structure extends from the first die to an adjacent die attached to the substrate and/or to at least one of the package leads, and provides electrical connection therebetween. Related devices and power amplifier circuits are also discussed.
1. An integrated circuit device package, comprising:
a substrate;
a first die comprising active electronic components attached to the substrate; and
at least one integrated interconnect structure on the first die opposite the substrate and comprising at least a portion of an input or output impedance matching network or harmonic termination between a circuit defined by the active electronic components of the first die and at least one package lead, the at least one integrated interconnect structure extending from the first die to the at least one package lead and providing electrical connection therebetween,
wherein the at least one integrated interconnect structure is spaced apart from the first die opposite the substrate.
2. The integrated circuit device package of claim 1 , wherein the electrical connection is free of a wire bond in the integrated circuit device package.
3. The integrated circuit device package of claim 1 , wherein:
the first die comprises a first bond pad, which is electrically connected to one or more of the active electronic components, on a surface of the first die opposite the substrate; and
the at least one integrated interconnect structure comprises a contact pad that is on the first bond pad.
4. The integrated circuit device package of claim 3 , wherein the at least one integrated interconnect structure comprises a conductive wiring pattern on a redistribution layer.
5. The integrated circuit device package of claim 3 , wherein
the at least one integrated interconnect structure comprises at least a portion of the input or output impedance matching network for the circuit defined by the active electronic components of the first die.
6. The integrated circuit device package of claim 5 , wherein the at least one integrated interconnect structure comprises a passive device comprising one or more passive electronic components.
7. The integrated circuit device package of claim 6 , wherein the contact pad is a second bond pad, which is electrically connected to the one or more passive electronic components, on a surface of the passive device that is facing the surface of the first die, wherein the second bond pad is connected to the first bond pad by a conductive bump therebetween such that the surface of the passive device is separated from the surface of the first die.
8. The integrated circuit device package of claim 6 , wherein the active electronic components of the first die define a first radio frequency (RF) amplifier circuit, wherein an adjacent die comprises active electronic components that define a second RF amplifier circuit, and wherein the first and second RF amplifier circuits are connected in a multi-stage amplifier arrangement.
9. The integrated circuit device package of claim 6 , wherein the passive device comprises an integrated passive device (IPD) including at least one inductor and is free of active electronic components.
10. The integrated circuit device package of claim 9 , wherein the IPD comprises an insulating material between conductive elements thereof to define at least one capacitor integrated therein.
11. The integrated circuit device package of claim 3 , wherein:
an adjacent die comprises one or more capacitors and at least one capacitor bond pad that is on a surface of the adjacent die opposite the substrate;
the contact pad of the at least one integrated interconnect structure is a first contact pad; and
the at least one integrated interconnect structure further comprises at least one second contact pad that is on the at least one capacitor bond pad.
12. The integrated circuit device package of claim 11 , wherein the at least one package lead comprises a gate lead and the first bond pad is a gate pad, wherein the adjacent die is between the first die and the gate lead, and wherein the at least one integrated interconnect structure comprises the input impedance matching network for the circuit.
13. The integrated circuit device package of claim 11 , wherein the at least one package lead comprises a drain lead and the first bond pad is a drain pad, wherein the adjacent die is between the first die and the drain lead, and wherein at least one integrated interconnect structure comprises the output impedance matching network for the circuit.
14. The integrated circuit device package of claim 1 , wherein the active electronic components comprise power transistor devices, and wherein the first die comprises at least one of a Group III-nitride or silicon carbide.
15. A radio frequency (RF) power amplifier device package, comprising:
a substrate;
a first die, comprising a plurality of transistor cells, attached to the substrate at a source pad on a bottom surface thereof and comprising a gate or drain pad at a top surface thereof opposite the substrate;
package leads configured to conduct electrical signals between the gate or drain pad of the first die and an external device; and
an integrated interconnect structure on the first die and spaced apart therefrom opposite the substrate, the integrated interconnect structure comprising a first contact pad on the gate or drain pad, and a second contact pad coupled to one of the package leads, and
wherein the integrated interconnect structure comprises at least a portion of an input or output impedance matching network between a circuit defined by the transistor cells of the first die and a package input or a package output provided by the one of the package leads.
16. The RF power amplifier device package of claim 15 , wherein the integrated interconnect structure provides electrical connection from the gate or drain pad of the first die to the one of the package leads, wherein the electrical connection is free of a wire bond in the RF power amplifier device package.
17. The RF power amplifier device package of claim 15 , wherein the integrated interconnect structure comprises a conductive wiring pattern on a redistribution layer or a passive device comprising one or more passive electronic components.
18. The RF power amplifier device package of claim 17 , wherein the first contact pad is a bond pad, which is electrically connected to the one or more passive electronic components, on a surface of the passive device that is facing the top surface of the first die, wherein the bond pad is connected to the gate or drain pad by a conductive bump therebetween such that the surface of the passive device is separated from the top surface of the first die.
19. The RF power amplifier device package of claim 17 , wherein the integrated interconnect structure further comprises a third contact pad coupled to an adjacent die, wherein the adjacent die comprises at least one bond pad on a surface thereof opposite the substrate and the third contact pad is on the at least one bond pad, and wherein:
the adjacent die comprises one or more capacitors; or
the adjacent die comprises a plurality of transistor cells that define a stage of an RF amplifier circuit.
20. The RF power amplifier device package of claim 15 , wherein the first die comprises the gate pad and the drain pad at the top surface thereof.
21. The RF power amplifier device package of claim 15 , wherein the integrated interconnect structure further comprises one or more inductors and a third contact pad, and further comprising:
a second die comprising one or more capacitors attached to the substrate adjacent the first die, and a bond pad on a surface thereof opposite the substrate,
wherein the integrated interconnect structure is stacked on the second die such that the third contact pad is on the bond pad and the second contact pad is on the one of the package leads.
22. The RF power amplifier device package of claim 21 , wherein the substrate is configured to provide an electrical ground, and wherein a distance between the integrated interconnect structure and the substrate is configured such that a quality factor of the one or more inductors is substantially maintained.