US 2013/0257564 A1 · POWER LINE FILTER FOR MULTIDIMENSIONAL INTEGRATED CIRCUITS

Abstract

An interposer element in a multidimensional integrated circuit with stacked elements has one or more conductors, especially power supply lines, coupled through decoupling networks defining low impedance shunts for high frequency signals to ground. The interposer has successive tiers including silicon, metal and dielectric deposition layers. The decoupling network for a conductor has at least one and preferably two reactive transmission lines. A transmission line has an inductor in series with the conductor and parallel capacitances at the inductor terminals. The inductors are formed by traces in spaced metal deposition layers forming coil windings and through vias connecting between layers to permit conductor crossovers. The capacitances are formed by MOScaps in the interposer layers. An embodiment has serially coupled coils with capacitances at the input, output and junction between the coils, wherein the coils are magnetically coupled to form a transformer.

Claims20

Dependent claims

A circuit configuration for decoupling a load circuit from AC noise propagating through a conductor leading to the load circuit, the circuit configuration comprising:

at least one circuit element having a plurality of superimposed layers, wherein at least one conductive pathway traverses through the circuit element for making electrical connections along the conductive pathway between points that are displaced from one another at least on one surface of the circuit element, the conductive pathway having an impedance characteristic;
wherein the impedance characteristic is defined in part by a decoupling circuit comprising at least one capacitance coupled in parallel with the load circuit and at least one inductance coupled in series with the conductive pathway, wherein the capacitance and inductance form a low pass filter attenuating noise signal components at frequencies above a predetermined frequency, thereby decoupling the load circuit from said noise signal components;
wherein the inductance is provided by at least one conductive coil occupying at least two of the superimposed layers and including at least one via extending between the superimposed layers.

Dependencies are inferred from the claim text.

Power line filter for multidimensional integrated circuits

Life of this patent

Power line filter for multidimensional integrated circuits

Life of this patent

Abstract

Claims20