Patents by Inventor Sasikanth Manipatruni
Sasikanth Manipatruni has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12379898Abstract: 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.Type: GrantFiled: February 7, 2022Date of Patent: August 5, 2025Assignee: Kepler Computing Inc.Inventors: Nabil Imam, Amrita Mathuriya, Ikenna Odinaka, Rafael Rios, Rajeev Kumar Dokania, Sasikanth Manipatruni
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Patent number: 12374377Abstract: A low power adder uses a non-linear polar capacitor to retain charge with fewer transistors than traditional CMOS sequential circuits. The non-linear polar capacitor includes ferroelectric material, paraelectric material, or non-linear dielectric. The adder may include minority gates and/or majority gates. Input signals are received by respective terminals of capacitors having non-linear polar material. The other terminals of these capacitors are coupled to a node where the majority function takes place for the inputs.Type: GrantFiled: September 3, 2021Date of Patent: July 29, 2025Assignee: Kepler Computing Inc.Inventors: Amrita Mathuriya, Ikenna Odinaka, Rajeev Kumar Dokania, Rafael Rios, Sasikanth Manipatruni
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Patent number: 12376312Abstract: A device structure comprises a first conductive interconnect, an electrode structure on the first conductive interconnect, an etch stop layer laterally surrounding the electrode structure; a plurality of memory devices above the electrode structure, where individual ones of the plurality of memory devices comprise a dielectric layer comprising a perovskite material. The device structure further comprises a plate electrode coupled between the plurality of memory devices and the electrode structure, where the plate electrode is in direct contact with a respective lower most conductive layer of the individual ones of the plurality of memory devices. The device structure further includes an insulative hydrogen barrier layer on at least a sidewall of the individual ones of the plurality of memory devices; and a plurality of via electrodes, wherein individual ones of the plurality of via electrodes are on a respective one of the individual ones of the plurality of memory devices.Type: GrantFiled: March 18, 2022Date of Patent: July 29, 2025Assignee: Kepler Computing Inc.Inventors: Noriyuki Sato, Tanay Gosavi, Rafael Rios, Amrita Mathuriya, Niloy Mukherjee, Mauricio Manfrini, Rajeev Kumar Dokania, Somilkumar J. Rathi, Sasikanth Manipatruni
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Patent number: 12369326Abstract: A device structure comprises a first conductive interconnect, an electrode structure on the first conductive interconnect, an etch stop layer laterally surrounding the electrode structure; a plurality of memory devices above the electrode structure, where individual ones of the plurality of memory devices comprise a dielectric layer comprising a perovskite material. The device structure further comprises a plate electrode coupled between the plurality of memory devices and the electrode structure, where the plate electrode is in direct contact with a respective lower most conductive layer of the individual ones of the plurality of memory devices. The device structure further includes an insulative hydrogen barrier layer on at least a sidewall of the individual ones of the plurality of memory devices; and a plurality of via electrodes, wherein individual ones of the plurality of via electrodes are on a respective one of the individual ones of the plurality of memory devices.Type: GrantFiled: April 4, 2022Date of Patent: July 22, 2025Assignee: Kepler Computing Inc.Inventors: Noriyuki Sato, Tanay Gosavi, Rafael Rios, Amrita Mathuriya, Niloy Mukherjee, Mauricio Manfrini, Rajeev Kumar Dokania, Somilkumar J. Rathi, Sasikanth Manipatruni
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Patent number: 12369351Abstract: The disclosed technology generally relates to ferroelectric materials and semiconductor devices, and more particularly to semiconductor memory devices incorporating doped polar materials. In one aspect, a semiconductor device comprises a capacitor, which in turn comprises a polar layer comprising a crystalline base polar material doped with a dopant. The base polar material includes one or more metal elements and one or both of oxygen or nitrogen, wherein the dopant comprises a metal element that is different from the one or more metal elements and is present at a concentration such that a ferroelectric switching voltage of the capacitor is different from that of the capacitor having the base polar material without being doped with the dopant by more than about 100 mV.Type: GrantFiled: November 20, 2023Date of Patent: July 22, 2025Assignee: Kepler Computing Inc.Inventors: Ramesh Ramamoorthy, Sasikanth Manipatruni, Gaurav Thareja
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Publication number: 20250225095Abstract: Matrix multiplication process is segregated between two separate dies—a memory die and a compute die to achieve low latency and high bandwidth artificial intelligence (AI) processor. The blocked matrix-multiplication scheme maps computations across multiple processor elements (PE) or matrix-multiplication units. The AI architecture for inference and training includes one or more PEs, where each PE includes memory (e.g., ferroelectric (FE) memory, FE-RAM, SRAM, DRAM, MRAM, etc.) to store weights and input/output I/O data. Each PE also includes a ring or mesh interconnect network to couple the PEs for fast access of information.Type: ApplicationFiled: March 4, 2025Publication date: July 10, 2025Applicant: Kepler Computing Inc.Inventors: Amrita Mathuriya, Rajeev Kumar Dokania, Ananda Samajdar, Sasikanth Manipatruni
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Patent number: 12347476Abstract: Described herein is a memory sensing scheme that improves noise margin. In at least one embodiment, one or more circuitries are described that are coupled to a bit-cell, wherein the bit-cell is coupled to a plate-line and a bit-line, wherein the one or more circuitries are to sense a bit-value stored in the bit-cell based, at least in part, on a first floating charge on a plate-line and a second floating charge on a bit-line.Type: GrantFiled: December 27, 2022Date of Patent: July 1, 2025Assignee: Kepler Computing Inc.Inventors: Ahmad Tavakoli, Rajeev Kumar Dokania, Mustansir Yunus Mukadam, Amrita Mathuriya, Debo Olaosebikan, Tanay Gosavi, Noriyuki Sato, Sasikanth Manipatruni
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Patent number: 12349365Abstract: A device structure comprises a first conductive interconnect, an electrode structure on the first conductive interconnect, an etch stop layer laterally surrounding the electrode structure; a plurality of memory devices above the electrode structure, where individual ones of the plurality of memory devices comprise a dielectric layer comprising a perovskite material. The device structure further comprises a plate electrode coupled between the plurality of memory devices and the electrode structure, where the plate electrode is in direct contact with a respective lower most conductive layer of the individual ones of the plurality of memory devices. The device structure further includes an insulative hydrogen barrier layer on at least a sidewall of the individual ones of the plurality of memory devices; and a plurality of via electrodes, wherein individual ones of the plurality of via electrodes are on a respective one of the individual ones of the plurality of memory devices.Type: GrantFiled: March 18, 2022Date of Patent: July 1, 2025Assignee: Kepler Computing Inc.Inventors: Noriyuki Sato, Tanay Gosavi, Rafael Rios, Amrita Mathuriya, Niloy Mukherjee, Mauricio Manfrini, Rajeev Kumar Dokania, Somilkumar J. Rathi, Sasikanth Manipatruni
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Publication number: 20250201778Abstract: Described is a packaging technology to improve performance of an AI processing system. An IC package is provided which comprises: a substrate; a first die on the substrate, and a second die stacked over the first die. The first die includes memory and the second die includes computational logic. The first die comprises a ferroelectric RAM (FeRAM) having bit-cells. Each bit-cell comprises an access transistor and a capacitor including ferroelectric material. The access transistor is coupled to the ferroelectric material. The FeRAM can be FeDRAM or FeSRAM. The memory of the first die may store input data and weight factors. The computational logic of the second die is coupled to the memory of the first die. The second die is an inference die that applies fixed weights for a trained model to an input data to generate an output. In one example, the second die is a training die that enables learning of the weights.Type: ApplicationFiled: March 3, 2025Publication date: June 19, 2025Applicant: Kepler Computing Inc.Inventors: Sasikanth Manipatruni, Rajeev Kumar Dokania, Amrita Mathuriya, Ramamoorthy Ramesh
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Patent number: 12336184Abstract: A device structure comprises a first conductive interconnect, an electrode structure on the first conductive interconnect, an etch stop layer laterally surrounding the electrode structure; a plurality of memory devices above the electrode structure, where individual ones of the plurality of memory devices comprise a dielectric layer comprising a perovskite material. The device structure further comprises a plate electrode coupled between the plurality of memory devices and the electrode structure, where the plate electrode is in direct contact with a respective lower most conductive layer of the individual ones of the plurality of memory devices. The device structure further includes an insulative hydrogen barrier layer on at least a sidewall of the individual ones of the plurality of memory devices; and a plurality of via electrodes, wherein individual ones of the plurality of via electrodes are on a respective one of the individual ones of the plurality of memory devices.Type: GrantFiled: March 18, 2022Date of Patent: June 17, 2025Assignee: Kepler Computing Inc.Inventors: Noriyuki Sato, Tanay Gosavi, Rafael Rios, Amrita Mathuriya, Niloy Mukherjee, Mauricio Manfrini, Rajeev Kumar Dokania, Somilkumar J. Rathi, Sasikanth Manipatruni
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Patent number: 12334918Abstract: An apparatus and configuring scheme where a capacitive input circuit can be programmed to perform different logic functions by adjusting the switching threshold of the capacitive input circuit. Digital inputs are received by respective capacitors on first terminals of those capacitors. The second terminals of the capacitors are connected to a summing node. A pull-up and pull-down device are coupled to the summing node. The pull-up and pull-down devices are controlled separately. During a reset phase, the pull-up and/or pull-down devices are turned on or off in a sequence, and inputs to the capacitors are set to condition the voltage on node n1. As such, a threshold for the capacitive input circuit is set. After the reset phase, an evaluation phase follows. In the evaluation phase, the output of the capacitive input circuit is determined based on the inputs and the logic function configured during the reset phase.Type: GrantFiled: December 15, 2021Date of Patent: June 17, 2025Assignee: Kepler Computing Inc.Inventors: Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Rajeev Kumar Dokania, Debo Olaosebikan, Sasikanth Manipatruni
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Patent number: 12334923Abstract: A multiplier cell is derived from a 1-bit full adder and an AND gate. The 1-bit full adder is derived from majority and/or minority gates. The majority and/or minority gates include non-linear polar material (e.g., ferroelectric or paraelectric material). A reset mechanism is provided to reset the nodes across the non-linear polar material. The multiplier cell is a hybrid of majority and/or minority gates and complementary metal oxide semiconductor (CMOS) based inverters and/or buffers. The adder uses a non-linear polar capacitor to retain charge with fewer transistors than traditional CMOS sequential circuits. The non-linear polar capacitor includes ferroelectric material, paraelectric material, or non-linear dielectric. Input signals are received by respective terminals of capacitors having non-linear polar material. The other terminals of these capacitors are coupled to a node where the majority function takes place for the inputs.Type: GrantFiled: October 1, 2021Date of Patent: June 17, 2025Assignee: Kepler Computing Inc.Inventors: Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Rajeev Kumar Dokania, Sasikanth Manipatruni
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Patent number: 12334127Abstract: 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.Type: GrantFiled: January 30, 2023Date of Patent: June 17, 2025Assignee: Kepler Computing Inc.Inventors: Rajeev Kumar Dokania, Mustansir Yunus Mukadam, Erik Unterborn, Pramod Kolar, Amrita Mathuriya, Debo Olaosebikan, Tanay Gosavi, Noriyuki Sato, Sasikanth Manipatruni
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Patent number: 12322743Abstract: An apparatus and configuring scheme where a paraelectric capacitive input circuit can be programmed to perform different logic functions by adjusting the switching threshold of the paraelectric capacitive input circuit. Digital inputs are received by respective capacitors on first terminals of those capacitors. The second terminals of the capacitors are connected to a summing node. A pull-up and pull-down device are coupled to the summing node. The pull-up and pull-down devices are controlled separately. During a reset phase, the pull-up and/or pull-down devices are turned on or off in a sequence, and inputs to the capacitors are set to condition the voltage on node n1. As such, a threshold for the capacitive input circuit is set. After the reset phase, an evaluation phase follows. In the evaluation phase, the output of the capacitive input circuit is determined based on the inputs and the logic function configured during the reset phase.Type: GrantFiled: December 15, 2021Date of Patent: June 3, 2025Assignee: Kepler Computing Inc.Inventors: Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Rajeev Kumar Dokania, Debo Olaosebikan, Sasikanth Manipatruni
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Patent number: 12324163Abstract: A device structure comprises a first conductive interconnect, an electrode structure on the first conductive interconnect, an etch stop layer laterally surrounding the electrode structure; a plurality of memory devices above the electrode structure, where individual ones of the plurality of memory devices comprise a dielectric layer comprising a perovskite material. The device structure further comprises a plate electrode coupled between the plurality of memory devices and the electrode structure, where the plate electrode is in direct contact with a respective lower most conductive layer of the individual ones of the plurality of memory devices. The device structure further includes an insulative hydrogen barrier layer on at least a sidewall of the individual ones of the plurality of memory devices; and a plurality of via electrodes, wherein individual ones of the plurality of via electrodes are on a respective one of the individual ones of the plurality of memory devices.Type: GrantFiled: March 15, 2022Date of Patent: June 3, 2025Assignee: Kepler Computing Inc.Inventors: Noriyuki Sato, Tanay Gosavi, Rafael Rios, Amrita Mathuriya, Niloy Mukherjee, Mauricio Manfrini, Rajeev Kumar Dokania, Somilkumar J. Rathi, Sasikanth Manipatruni
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Patent number: 12324162Abstract: 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.Type: GrantFiled: June 17, 2022Date of Patent: June 3, 2025Assignee: Kepler Computing Inc.Inventors: Rajeev Kumar Dokania, Noriyuki Sato, Tanay Gosavi, Rafael Rios, Amrita Mathuriya, Niloy Mukherjee, Somilkumar J. Rathi, Sasikanth Manipatruni
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Patent number: 12316319Abstract: An apparatus and configuring scheme where a capacitive input circuit can be programmed to perform different logic functions by adjusting the switching threshold of the capacitive input circuit. Digital inputs are received by respective capacitors on first terminals of those capacitors. The second terminals of the capacitors are connected to a summing node. A pull-up and pull-down device are coupled to the summing node. The pull-up and pull-down devices are controlled separately. During a reset phase, the pull-up and/or pull-down devices are turned on or off in a sequence, and inputs to the capacitors are set to condition the voltage on node n1. As such, a threshold for the capacitive input circuit is set. After the reset phase, an evaluation phase follows. In the evaluation phase, the output of the capacitive input circuit is determined based on the inputs and the logic function configured during the reset phase.Type: GrantFiled: December 14, 2021Date of Patent: May 27, 2025Assignee: Kepler Computing Inc.Inventors: Amrita Mathuriya, Rafael Rios, Ikenna Odinaka, Rajeev Kumar Dokania, Sasikanth Manipatruni
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Publication number: 20250169078Abstract: The memory bit-cell formed using the ferroelectric capacitor results in a taller and narrower bit-cell compared to traditional memory bit-cells. As such, more bit-cells can be packed in a die resulting in a higher density memory that can operate at lower voltages than traditional memories while providing the much sought after non-volatility behavior. The pillar capacitor includes a plug that assists in fabricating a narrow pillar.Type: ApplicationFiled: January 6, 2025Publication date: May 22, 2025Applicant: Kepler Computing Inc.Inventors: Gaurav Thareja, Sasikanth Manipatruni, Rajeev Kumar Dokania, Ramamoorthy Ramesh, Amrita Mathuriya
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Patent number: 12300297Abstract: A memory is described having a plurality of bit-cells organized in a row or column. An individual bit-cell of the plurality of bit-cells includes an access transistor and a plurality of capacitors. A word-line is positioned under the access transistor, wherein the access transistor is controllable by the word-line, whereas the plurality of capacitors is positioned above the access transistor. The individual bit-cell has an individual boundary which substantially abuts a neighboring bit-cell in the row or column such that there is no dummy bit-cell between individual bit-cell and the neighboring bit-cell.Type: GrantFiled: August 5, 2022Date of Patent: May 13, 2025Assignee: Kepler Computing Inc.Inventors: Rajeev Kumar Dokania, Mustansir Yunus Mukadam, Noriyuki Sato, Tanay Gosavi, Niloy Mukherjee, Amrita Mathuriya, Sasikanth Manipatruni
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Patent number: 12294029Abstract: The disclosed technology generally relates to ferroelectric materials and semiconductor devices, and more particularly to semiconductor memory devices incorporating doped polar materials. In one aspect, a capacitor comprises a crystalline polar layer comprising a base polar material substitutionally doped with a dopant. The base polar material comprises one or more metal elements and one or both of oxygen or nitrogen. The dopant comprises a metal element of one of 4d series, 5d series, 4f series or 5f series that is different from the one or more metal elements, such that a ferroelectric switching voltage of the capacitor is different from that of the capacitor having the base polar material without being doped with the dopant by more than about 100 mV.Type: GrantFiled: July 26, 2022Date of Patent: May 6, 2025Assignee: Kepler Computing Inc.Inventors: Ramesh Ramamoorthy, Sasikanth Manipatruni, Gaurav Thareja