Patents by Inventor Alessandro Calderoni

Alessandro Calderoni 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).

  • Patent number: 12300298
    Abstract: Methods, systems, and devices for differential storage in memory arrays are described. A memory device may include pairs of memory cells configured to store a single logic state (e.g., a single bit of information). Additionally, the memory device may include sense amplifiers configured to sense the logic state based on a difference between a voltage of a first ferroelectric memory cell of the pair of memory cells and a voltage of a second ferroelectric memory cell of the pair of memory cells. In one example, the memory device may include pairs of memory cells within a single memory array on a single level. Here, each memory cell pair may include a memory cells that are each coupled with a same word line and plate line. Additionally, each memory cell pair may include memory cells each coupled with different digit lines.
    Type: Grant
    Filed: October 18, 2022
    Date of Patent: May 13, 2025
    Assignee: Micron Technology, Inc.
    Inventors: Durai Vishak Nirmal Ramaswamy, Giorgio Servalli, Angelo Visconti, Marcello Mariani, Alessandro Calderoni
  • Publication number: 20250029638
    Abstract: Some embodiments include apparatuses and methods of operating the apparatuses. One of the apparatuses includes a first memory cell and a second memory cell, each of the first and second memory cells including a first transistor including a first region and a first charge storage structure separated from the first region; a second transistor including a second region formed over the first charge storage structure; a first data line coupled to the first memory cell configured to provide a first sum based on current on the first data line during a memory operation; a second data line coupled to the second memory cell configured to provide a second sum based on current on the second data line during the memory operation; and an output circuit to provide output information based on values of the first and second sums.
    Type: Application
    Filed: July 19, 2024
    Publication date: January 23, 2025
    Inventors: Kamal M. Karda, Karthik Sarpatwari, Alessandro Calderoni, Durai Vishak Nirmal Ramaswamy, Yunfei Gao
  • Publication number: 20240420750
    Abstract: Some embodiments include apparatuses in which one of such apparatus includes a first memory cell including a first transistor having a first channel region coupled between a data line and a conductive region, and a first charge storage structure located between the first data line and the conductive region, and a second transistor having a second channel region coupled to and located between the first data line and the first charge storage structure; a second memory cell including a third transistor having a third channel region coupled between a second data line and the conductive region, and a second charge storage structure located between the second data line and the conductive region, and a fourth transistor having a fourth channel region coupled to and located between the second data line and the second charge storage structure; a conductive line forming a gate of each of the first, second, third, and fourth transistors; and a conductive structure located between the first and second charge storage stru
    Type: Application
    Filed: August 28, 2024
    Publication date: December 19, 2024
    Inventors: Kamal M. Karda, Haitao Liu, Karthik Sarpatwari, Durai Vishak Nirmal Ramaswamy, Alessandro Calderoni, Richard E. Fackenthal, Duane R. Mills
  • Publication number: 20240389309
    Abstract: Implementations described herein relate to various structures, integrated assemblies, and memory devices. In some implementations, a memory device may include a memory array that includes multiple stacks of vertically stacked memory cells. The memory device may include a transistor positioned above a stack of vertically stacked memory cells of the multiple stacks of vertically stacked memory cells. The transistor may include a channel positioned above the stack of vertically stacked memory cells, a first source/drain region on top of a first portion of the channel, a second source/drain region on top of a second portion of the channel, a gate having a top surface that is lower than a top surface of the first source/drain region and that is lower than a top surface of the second source/drain region, and a gate dielectric that separates the gate from the channel.
    Type: Application
    Filed: May 8, 2024
    Publication date: November 21, 2024
    Inventors: Kamal M. KARDA, Si-Woo LEE, Durai Vishak Nirmal RAMASWAMY, Alessandro CALDERONI, Mark L. FISCHER
  • Patent number: 12080331
    Abstract: Some embodiments include apparatuses in which one of such apparatus includes a first memory cell including a first transistor having a first channel region coupled between a data line and a conductive region, and a first charge storage structure located between the first data line and the conductive region, and a second transistor having a second channel region coupled to and located between the first data line and the first charge storage structure; a second memory cell including a third transistor having a third channel region coupled between a second data line and the conductive region, and a second charge storage structure located between the second data line and the conductive region, and a fourth transistor having a fourth channel region coupled to and located between the second data line and the second charge storage structure; a conductive line forming a gate of each of the first, second, third, and fourth transistors; and a conductive structure located between the first and second charge storage stru
    Type: Grant
    Filed: May 23, 2023
    Date of Patent: September 3, 2024
    Assignee: Micron Technology, Inc.
    Inventors: Kamal M. Karda, Haitao Liu, Karthik Sarpatwari, Durai Vishak Nirmal Ramaswamy, Alessandro Calderoni, Richard E Fackenthal, Duane R. Mills
  • Publication number: 20240164113
    Abstract: Methods, systems, and devices for memory structures with voids are described. A memory architecture may include voids between adjacent columns of memory cells. For example, a memory array may be manufactured by forming one or more sacrificial structures, as well as a liner material on sidewalls of the sacrificial structures, extending in the column direction. Memory cells may be formed on the sacrificial structures by patterning a conductive material to form bottom electrodes, forming a ferroelectric material adjacent to the bottom electrodes, and forming a set of plate lines over the ferroelectric material. The sacrificial structures may then be removed to form voids between at least some adjacent columns of memory cells.
    Type: Application
    Filed: November 15, 2023
    Publication date: May 16, 2024
    Inventors: Alessandro Calderoni, Kamal Karda, Durai Vishak Nirmal Ramaswamy
  • Publication number: 20240127877
    Abstract: Methods, systems, and devices for differential storage in memory arrays are described. A memory device may include pairs of memory cells configured to store a single logic state (e.g., a single bit of information). Additionally, the memory device may include sense amplifiers configured to sense the logic state based on a difference between a voltage of a first ferroelectric memory cell of the pair of memory cells and a voltage of a second ferroelectric memory cell of the pair of memory cells. In one example, the memory device may include pairs of memory cells within a single memory array on a single level. Here, each memory cell pair may include a memory cells that are each coupled with a same word line and plate line. Additionally, each memory cell pair may include memory cells each coupled with different digit lines.
    Type: Application
    Filed: October 18, 2022
    Publication date: April 18, 2024
    Inventors: Durai Vishak Nirmal Ramaswamy, Giorgio Servalli, Angelo Visconti, Marcello Mariani, Alessandro Calderoni
  • Publication number: 20230298652
    Abstract: Some embodiments include apparatuses in which one of such apparatus includes a first memory cell including a first transistor having a first channel region coupled between a data line and a conductive region, and a first charge storage structure located between the first data line and the conductive region, and a second transistor having a second channel region coupled to and located between the first data line and the first charge storage structure; a second memory cell including a third transistor having a third channel region coupled between a second data line and the conductive region, and a second charge storage structure located between the second data line and the conductive region, and a fourth transistor having a fourth channel region coupled to and located between the second data line and the second charge storage structure; a conductive line forming a gate of each of the first, second, third, and fourth transistors; and a conductive structure located between the first and second charge storage stru
    Type: Application
    Filed: May 23, 2023
    Publication date: September 21, 2023
    Inventors: Kamal M. Karda, Haitao Liu, Karthik Sarpatwari, Durai Vishak Nirmal Ramaswamy, Alessandro Calderoni, Richard E. Fackenthal, Duane R. Mills
  • Patent number: 11711924
    Abstract: Some embodiments include an integrated assembly having first electrodes with top surfaces, and with sidewall surfaces extending downwardly from the top surfaces. The first electrodes are solid pillars. Insulative material is along the sidewall surfaces of the first electrodes. Second electrodes extend along the sidewall surfaces of the first electrodes and are spaced from the sidewall surfaces by the insulative material. Conductive-plate-material extends across the first and second electrodes, and couples the second electrodes to one another. Leaker-devices electrically couple the first electrodes to the conductive-plate-material and are configured to discharge at least a portion of excess charge from the first electrodes to the conductive-plate-material. Some embodiments include methods of forming integrated assemblies.
    Type: Grant
    Filed: March 11, 2022
    Date of Patent: July 25, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Alessandro Calderoni, Beth R. Cook, Durai Vishak Nirmal Ramaswamy, Ashonita A. Chavan
  • Patent number: 11688450
    Abstract: Some embodiments include apparatuses in which one of such apparatus includes a first memory cell including a first transistor having a first channel region coupled between a data line and a conductive region, and a first charge storage structure located between the first data line and the conductive region, and a second transistor having a second channel region coupled to and located between the first data line and the first charge storage structure; a second memory cell including a third transistor having a third channel region coupled between a second data line and the conductive region, and a second charge storage structure located between the second data line and the conductive region, and a fourth transistor having a fourth channel region coupled to and located between the second data line and the second charge storage structure; a conductive line forming a gate of each of the first, second, third, and fourth transistors; and a conductive structure located between the first and second charge storage stru
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: June 27, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Kamal M. Karda, Haitao Liu, Karthik Sarpatwari, Durai Vishak Nirmal Ramaswamy, Alessandro Calderoni, Richard E Fackenthal, Duane R. Mills
  • Patent number: 11501817
    Abstract: Methods, systems, and devices for operating a ferroelectric memory cell or cells are described. A cell may be written with a value that is intended to convey a different logic state than may typically be associated with the value. For example, a cell that has stored a charge associated with one logic state for a time period may be re-written to store a different charge, and the re-written cell may still be read to have the originally stored logic state. An indicator may be stored in a latch to indicate whether the logic state currently stored by the cell is the intended logic state of the cell. A cell may, for example, be re-written with an opposite value periodically, based on the occurrence of an event, or based on a determination that the cell has stored one value (or charge) for a certain time period.
    Type: Grant
    Filed: March 24, 2021
    Date of Patent: November 15, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Alessandro Calderoni, Durai Vishak Nirmal Ramaswamy, Kirk Prall, Ferdinando Bedeschi
  • Publication number: 20220278112
    Abstract: Some embodiments include apparatuses in which one of such apparatus includes a first memory cell including a first transistor having a first channel region coupled between a data line and a conductive region, and a first charge storage structure located between the first data line and the conductive region, and a second transistor having a second channel region coupled to and located between the first data line and the first charge storage structure; a second memory cell including a third transistor having a third channel region coupled between a second data line and the conductive region, and a second charge storage structure located between the second data line and the conductive region, and a fourth transistor having a fourth channel region coupled to and located between the second data line and the second charge storage structure; a conductive line forming a gate of each of the first, second, third, and fourth transistors; and a conductive structure located between the first and second charge storage stru
    Type: Application
    Filed: February 26, 2021
    Publication date: September 1, 2022
    Inventors: Kamal M. Karda, Haitao Liu, Karthik Sarpatwari, Durai Vishak Nirmal Ramaswamy, Alessandro Calderoni, Richard E. Fackenthal, Duane R. Mills
  • Patent number: 11393978
    Abstract: An array of cross point memory cells comprises spaced first lines which cross spaced second lines. Two memory cells are individually between one of two immediately adjacent of the second lines and a same single one of the first lines.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: July 19, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Scott E. Sills, Durai Vishak Nirmal Ramaswamy, Alessandro Calderoni
  • Publication number: 20220199634
    Abstract: Some embodiments include an integrated assembly having first electrodes with top surfaces, and with sidewall surfaces extending downwardly from the top surfaces. The first electrodes are solid pillars. Insulative material is along the sidewall surfaces of the first electrodes. Second electrodes extend along the sidewall surfaces of the first electrodes and are spaced from the sidewall surfaces by the insulative material. Conductive-plate-material extends across the first and second electrodes, and couples the second electrodes to one another. Leaker-devices electrically couple the first electrodes to the conductive-plate-material and are configured to discharge at least a portion of excess charge from the first electrodes to the conductive-plate-material. Some embodiments include methods of forming integrated assemblies.
    Type: Application
    Filed: March 11, 2022
    Publication date: June 23, 2022
    Applicant: Micron Technology, Inc.
    Inventors: Alessandro Calderoni, Beth R. Cook, Durai Vishak Nirmal Ramaswamy, Ashonita A. Chavan
  • Patent number: 11315939
    Abstract: Some embodiments include an integrated assembly having first electrodes with top surfaces, and with sidewall surfaces extending downwardly from the top surfaces. The first electrodes are solid pillars. Insulative material is along the sidewall surfaces of the first electrodes. Second electrodes extend along the sidewall surfaces of the first electrodes and are spaced from the sidewall surfaces by the insulative material. Conductive-plate-material extends across the first and second electrodes, and couples the second electrodes to one another. Leaker-devices electrically couple the first electrodes to the conductive-plate-material and are configured to discharge at least a portion of excess charge from the first electrodes to the conductive-plate-material. Some embodiments include methods of forming integrated assemblies.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: April 26, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Alessandro Calderoni, Beth R. Cook, Durai Vishak Nirmal Ramaswamy, Ashonita A. Chavan
  • Publication number: 20210280231
    Abstract: Methods, systems, and devices for operating a ferroelectric memory cell or cells are described. A cell may be written with a value that is intended to convey a different logic state than may typically be associated with the value. For example, a cell that has stored a charge associated with one logic state for a time period may be re-written to store a different charge, and the re-written cell may still be read to have the originally stored logic state. An indicator may be stored in a latch to indicate whether the logic state currently stored by the cell is the intended logic state of the cell. A cell may, for example, be re-written with an opposite value periodically, based on the occurrence of an event, or based on a determination that the cell has stored one value (or charge) for a certain time period.
    Type: Application
    Filed: March 24, 2021
    Publication date: September 9, 2021
    Inventors: Alessandro Calderoni, Durai Vishak Nirmal Ramaswamy, Kirk Prall, Ferdinando Bedeschi
  • Patent number: 11024378
    Abstract: Memory systems and memory programming methods are described.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: June 1, 2021
    Assignee: Micron Technology , Inc.
    Inventors: Emiliano Faraoni, Scott E. Sills, Alessandro Calderoni, Adam Johnson
  • Publication number: 20210134816
    Abstract: Some embodiments include an integrated assembly having first electrodes with top surfaces, and with sidewall surfaces extending downwardly from the top surfaces. The first electrodes are solid pillars. Insulative material is along the sidewall surfaces of the first electrodes. Second electrodes extend along the sidewall surfaces of the first electrodes and are spaced from the sidewall surfaces by the insulative material. Conductive-plate-material extends across the first and second electrodes, and couples the second electrodes to one another. Leaker-devices electrically couple the first electrodes to the conductive-plate-material and are configured to discharge at least a portion of excess charge from the first electrodes to the conductive-plate-material. Some embodiments include methods of forming integrated assemblies.
    Type: Application
    Filed: December 22, 2020
    Publication date: May 6, 2021
    Applicant: Micron Technology, Inc.
    Inventors: Alessandro Calderoni, Beth R. Cook, Durai Vishak Nirmal Ramaswamy, Ashonita A. Chavan
  • Patent number: 10978128
    Abstract: Methods, systems, and devices for operating a ferroelectric memory cell or cells are described. A cell may be written with a value that is intended to convey a different logic state than may typically be associated with the value. For example, a cell that has stored a charge associated with one logic state for a time period may be re-written to store a different charge, and the re-written cell may still be read to have the originally stored logic state. An indicator may be stored in a latch to indicate whether the logic state currently stored by the cell is the intended logic state of the cell. A cell may, for example, be re-written with an opposite value periodically, based on the occurrence of an event, or based on a determination that the cell has stored one value (or charge) for a certain time period.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 13, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Alessandro Calderoni, Durai Vishak Nirmal Ramaswamy, Kirk Prall, Ferdinando Bedeschi
  • Patent number: 10903218
    Abstract: Some embodiments include an integrated assembly having first electrodes with top surfaces, and with sidewall surfaces extending downwardly from the top surfaces. The first electrodes are solid pillars. Insulative material is along the sidewall surfaces of the first electrodes. Second electrodes extend along the sidewall surfaces of the first electrodes and are spaced from the sidewall surfaces by the insulative material. Conductive-plate-material extends across the first and second electrodes, and couples the second electrodes to one another. Leaker-devices electrically couple the first electrodes to the conductive-plate-material and are configured to discharge at least a portion of excess charge from the first electrodes to the conductive-plate-material. Some embodiments include methods of forming integrated assemblies.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: January 26, 2021
    Assignee: Micron Technology, Inc.
    Inventors: Alessandro Calderoni, Beth R. Cook, Durai Vishak Nirmal Ramaswamy, Ashonita A. Chavan