Kepler Computing Inc.

Neal Reynolds

Sasikanth Manipatruni

Amrita Mathuriya

Rajeev Kumar Dokania

Rafael Rios

Ramamoorthy Ramesh

Ikenna Odinaka

Robert Menezes

Tanay Gosavi

James David Clarkson

Mustansir Yunus Mukadam

A disturb mitigation scheme is described for a 1TnC or multi-element ferroelectric gain bit-cell where after writing to a selected capacitor of the bit-cell, a cure phase is initiated. Between the cure phase and the write phase, there may be zero or more cycles where the selected word-line, bit-line, and plate-lines are pulled-down to ground. The cure phase may occur immediately before the write phase. In the cure phase, the word-line is asserted again just like in the write phase. In the cure phase, the voltage on bit-line is inverted compared to the voltage on the bit-line in the write phase. By programming a value in a selected capacitor to be opposite of the value written in the write phase of that selected capacitor, time accumulation of disturb is negated. This allows to substantially zero out disturb field on the unselected capacitors of the same bit-cell and/or other unselected bit-cells.

Read disturb mitigation for non-linear polar material based multi-capacitor bit-cell

A disturb mitigation scheme is described for aTnC or multi-element ferroelectric gain bit-cell where after writing to a selected capacitor of the bit-cell, a cure phase is initiated. Between the cure phase and the write phase, there may be zero or more cycles where the selected word-line, bit-line, and plate-lines are pulled-down to ground. The cure phase may occur immediately before the write phase. In the cure phase, the word-line is asserted again just like in the write phase. In the cure phase, the voltage on bit-line is inverted compared to the voltage on the bit-line in the write phase. By programming a value in a selected capacitor to be opposite of the value written in the write phase of that selected capacitor, time accumulation of disturb is negated. This allows to substantially zero out disturb field on the unselected capacitors of the same bit-cell and/or other unselected bit-cells.

Write disturb mitigation for column multiplexed non-linear polar material based multi-capacitor bit-cell

A new class of logic gates are presented that use non-linear polar material. The logic gates include multi-input majority gates. Input signals in the form of digital signals are driven to non-linear input capacitors on their respective first terminals. The second terminals of the non-linear input capacitors are coupled a summing node which provides a majority function of the inputs. The majority node is then coupled driver circuitry which can be any suitable logic gate such as a buffer, inverter, NAND gate, NOR gate, etc. In the multi-input majority or minority gates, the non-linear charge response from the non-linear input capacitors results in output voltages close to or at rail-to-rail voltage levels. Bringing the majority output close to rail-to-rail voltage eliminates the high leakage problem faced from majority gates formed using linear input capacitors.

Fabrication of a majority logic gate having non-linear input capacitors

2-input NAND gate with non-linear input capacitors

Majority logic gate based XOR logic gate with non-linear input capacitors

Majority logic gate based and-or-invert logic gate with non-linear input capacitors

Majority logic gate with non-linear input capacitors

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Bremerton, WA, United States of America

Neal Reynolds