Kepler Computing Inc.

A method of fabricating a device includes forming a multi-layer stack comprising a plurality of electrode layers and a first dielectric layer comprising a non-linear polar material. The method further comprises forming a second dielectric layer on the multi-layer stack, annealing the multi-layer stack, and forming a transistor above a second substrate. A third dielectric layer is formed above the transistor. The second dielectric layer can be bonded with the third dielectric layer and the multi-layer stack can be etched to form a capacitor and a plate electrode connected with the capacitor. An electrode structure can be formed, where at least a portion of the electrode structure extends through the plate electrode and couples with a terminal of the transistor.

Described herein is a memory bit-cell that results in lower leakage and higher sensing margin. In at least one embodiment, a memory bit-cell comprises a plurality of capacitors, wherein an individual capacitor is coupled to a node and an individual plate-line. In at least one embodiment, memory bit-cell comprises a first transistor coupled to the node. In at least one embodiment, memory bit-cell comprises a second transistor coupled in series with the first transistor, wherein the second transistor is coupled to a bit-line, wherein the first transistor or the second transistor is controllable by a word-line, and wherein the word-line is parallel to the individual plate-line.

An apparatus comprising a transistor having a gate terminal coupled to a word-line, wherein the transistor is further coupled to a bit-line. The apparatus further comprises a capacitor having a first terminal coupled to a plate-line and a second terminal coupled to the transistor, wherein the capacitor includes a non-linear polar material, and wherein the capacitor includes at least four stable states. In at least one example, the capacitor has a first polarization loop and a second polarization loop, wherein the second polarization loop is within the first polarization loop.

Described herein is a method and apparatus to reduce electric displacement and polarization target for a memory bit-cell. In at least one embodiment, electric displacement and polarization target for non-linear polar material based memory bit-cells is reduced by re-architecting the memory. In at least one embodiment, memory is architected to reduce electric displacement and polarization target by reducing capacitance on sense line or bit-line for bit-cell being accessed or written to. In at least one embodiment, memory arrays are actively split into two or more sub-arrays and routing capacitance is reduced, which in turn reduces capacitance on sense line or bit-line.

A method of fabricating a device comprising forming a multi-layer stack by sequentially depositing a first conductive layer, a dielectric layer on the first conductive layer, a second conductive layer on the dielectric layer, a third conductive layer comprising one or more of ruthenium, platinum, or iridium on the second conductive layer, and depositing an insulator layer on the third conductive layer. The method further comprises patterning the multi-layer stack to form a device by utilizing a plasma etch process.

Described is a low power, high-density a 1T-1C (one transistor and one capacitor) memory bit-cell, wherein the capacitor comprises a pillar structure having ferroelectric material (perovskite, improper ferroelectric, or hexagonal ferroelectric) and conductive oxides as electrodes. In various embodiments, one layer of the conductive oxide electrode wraps around the pillar capacitor, and forms the outer electrode of the pillar capacitor. The core of the pillar capacitor can take various forms.

A method of fabricating a system includes fabricating a plurality of transistors and coupling a forming a bridge structure connected between a gate contact of a first transistor with a drain contact of a second transistor. The method further includes fabricating a multi-level memory structure including capacitors that comprise a ferroelectric material or a paraelectric material. The capacitors within a given level are coupled together by a plate electrode. The method further includes forming a signal electrode coupled with the plate electrode.

A method of fabricating a device includes forming a multi-layer stack comprising a plurality of electrode layers and a first dielectric layer comprising a non-linear polar material. The method further comprises forming a second dielectric layer on the multi-layer stack, annealing the multi-layer stack, and forming a transistor above a second substrate. A third dielectric layer is formed above the transistor. The second dielectric layer can be bonded with the third dielectric layer and the multi-layer stack can be etched to form a capacitor and a plate electrode connected with the capacitor. An electrode structure can be formed, where at least a portion of the electrode structure extends through the plate electrode and couples with a terminal of the transistor.

Described herein is a memory bit-cell that results in lower leakage and higher sensing margin. In at least one embodiment, a memory bit-cell comprises a plurality of capacitors, wherein an individual capacitor is coupled to a node and an individual plate-line. In at least one embodiment, memory bit-cell comprises a first transistor coupled to the node. In at least one embodiment, memory bit-cell comprises a second transistor coupled in series with the first transistor, wherein the second transistor is coupled to a bit-line, wherein the first transistor or the second transistor is controllable by a word-line, and wherein the word-line is parallel to the individual plate-line.

Asynchronous full-adder circuit is described. The full-adder includes majority and/or minority gates some of which receive two first inputs (A.t, A.f), two second inputs (B.t, B.f), two carry inputs (Cin.t, Cin.f), third acknowledgement input (Cout.e), and fourth acknowledgement input (Sum.e), and generate controls to control gates of transistors, wherein the transistors are coupled to generate two carry outputs (Cout.t, Cout.e), two sum outputs (Sum.t, Sum.e), first acknowledgement output (A.e), second acknowledgement output (B.e), and third acknowledgement output (Cin.e). The majority and/or minority gates comprise CMOS gates or multi-input capacitive circuitries. The multi-input capacitive circuitries include capacitive structures that may comprise linear dielectric, paraelectric dielectric, or ferroelectric dielectric. The capacitors can be planar or non-planar. The capacitors may be stacked vertically to reduce footprint of the asynchronous full-adder circuit. Asynchronous full-adders coupled in series is used to implement a carry-ripple adder.