Patents by Inventor Purval S. Sule
Purval S. Sule 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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Publication number: 20240013840Abstract: Memories having a controller configured to perform methods during programming operations including apply a first voltage level to a data line selectively connected to a selected memory cell selected, apply a lower second voltage level to a select gate connected between the data line and the memory cell, decrease the voltage level applied to the data line from the first voltage level to a third voltage level while continuing to apply the second voltage level to the select gate, increase the voltage level applied to the select gate from the second voltage level to a fourth voltage level after the voltage level of the data line settles to the third voltage level, and apply a programming voltage to the memory cell after increasing the voltage level applied to the select gate to the fourth voltage level.Type: ApplicationFiled: July 21, 2023Publication date: January 11, 2024Inventors: Violante Moschiano, Purval S. Sule, Han Liu, Andrea D'alessandro, Pranav Kalavade, Han Zhao, Shantanu Rajwade
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Patent number: 11721396Abstract: Memories having a controller configured to perform methods during programming operations including apply a first voltage level to a data line selectively connected to a selected memory cell selected, apply a lower second voltage level to a select gate connected between the data line and the memory cell, decrease the voltage level applied to the data line from the first voltage level to a third voltage level while continuing to apply the second voltage level to the select gate, increase the voltage level applied to the select gate from the second voltage level to a fourth voltage level after the voltage level of the data line settles to the third voltage level, and apply a programming voltage to the memory cell after increasing the voltage level applied to the select gate to the fourth voltage level.Type: GrantFiled: September 4, 2020Date of Patent: August 8, 2023Assignee: Micron Technology, Inc.Inventors: Violante Moschiano, Purval S. Sule, Han Liu, Andrea D'Alessandro, Pranav Kalavade, Han Zhao, Shantanu Rajwade
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Patent number: 11210025Abstract: Some embodiments include apparatuses and methods using memory cells and a control unit to suspend an erase operation performed on a first portion of the memory cells and to suspend a program operation performed on a second portion of the memory cells while the erase operation is suspended. The control unit includes register circuitry to store status information indicating that the program operation is suspended while the erase operation is suspended.Type: GrantFiled: December 23, 2019Date of Patent: December 28, 2021Assignee: Micron Technology, Inc.Inventors: Aliasgar S. Madraswala, Purval S. Sule, Karthikeyan Ramamurthi
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Publication number: 20200402586Abstract: Memories having a controller configured to perform methods during programming operations including apply a first voltage level to a data line selectively connected to a selected memory cell selected, apply a lower second voltage level to a select gate connected between the data line and the memory cell, decrease the voltage level applied to the data line from the first voltage level to a third voltage level while continuing to apply the second voltage level to the select gate, increase the voltage level applied to the select gate from the second voltage level to a fourth voltage level after the voltage level of the data line settles to the third voltage level, and apply a programming voltage to the memory cell after increasing the voltage level applied to the select gate to the fourth voltage level.Type: ApplicationFiled: September 4, 2020Publication date: December 24, 2020Applicant: MICRON TECHNOLOGY, INC.Inventors: Violante Moschiano, Purval S. Sule, Han Liu, Andrea D'Alessandro, Pranav Kalavade, Han Zhao, Shantanu Rajwade
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Patent number: 10777277Abstract: Memories having a controller configured to perform methods during programming operations including applying a first voltage level to first and second data lines while applying a second, lower, voltage level to first and second select gates connected between the data lines and respective strings of memory cells; decreasing a voltage level of the first data line to a third voltage level; increasing a voltage level of the first select gate to a fourth voltage level; applying a fifth voltage level, higher than the first voltage level, to first and second access lines coupled to memory cells of the strings of memory cells; and increasing a voltage level of the first access line to a sixth voltage level.Type: GrantFiled: October 17, 2019Date of Patent: September 15, 2020Assignee: Micron Technology, Inc.Inventors: Violante Moschiano, Purval S. Sule, Han Liu, Andrea D'Alessandro, Pranav Kalavade, Han Zhao, Shantanu Rajwade
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Patent number: 10762974Abstract: Various embodiments, disclosed herein, can include apparatus and methods to perform a one check failure byte (CFBYTE) scheme in programming of a memory device. In programming memory cells in which each memory cell can store multiple bits, the multiple bits being a n-tuple of bits of a set of n-tuples of bits with each n-tuple of the set associated with a level of a set of levels of threshold voltages for the memory cells. Verification of a program algorithm can be structured based on a programming algorithm that proceeds in a progressive manner by placing a threshold voltage of one level/distribution at a time. The routine of this progression can be used to perform just one failure byte check for that specific target distribution only, thus eliminating the need to check failure byte for all subsequent target distribution during every stage of program algorithm. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: June 3, 2019Date of Patent: September 1, 2020Assignee: Micron Technology, Inc.Inventors: Aliasgar S. Madraswala, Kristopher H. Gaewsky, Naveen Vittal Prabhu, Purval S. Sule, Trupti Bemalkhedkar, Nehul N. Tailor, Quan H. Ngo, Dheeraj Srinivasan
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Publication number: 20200133579Abstract: Some embodiments include apparatuses and methods using memory cells and a control unit to suspend an erase operation performed on a first portion of the memory cells and to suspend a program operation performed on a second portion of the memory cells while the erase operation is suspended. The control unit includes register circuitry to store status information indicating that the program operation is suspended while the erase operation is suspended.Type: ApplicationFiled: December 23, 2019Publication date: April 30, 2020Inventors: Aliasgar S. Madraswala, Purval S. Sule, Karthikeyan Ramamurthi
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Patent number: 10622083Abstract: In connection with data pin timing calibration with a strobe signal, examples provide for determination of pass/fail status of a pin from multiple pass/fail results in a single operation. Determination of pass/fail results for multiple pins based on multiple applied trim offsets can be made in parallel. Accordingly, a time to determine pass/fail results from multiple trim values for a pin can be reduced, which can enable faster power-up of NAND flash devices.Type: GrantFiled: October 23, 2018Date of Patent: April 14, 2020Assignee: Intel CorporationInventors: Varsha Regulapati, Heonwook Kim, Aliasgar S. Madraswala, Naga Kiranmayee Upadhyayula, Purval S. Sule, Jong Tai Park, Sriram Balasubrahmanyam, Manjiri M. Katmore
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Publication number: 20200066350Abstract: Memories having a controller configured to perform methods during programming operations including applying a first voltage level to first and second data lines while applying a second, lower, voltage level to first and second select gates connected between the data lines and respective strings of memory cells; decreasing a voltage level of the first data line to a third voltage level; increasing a voltage level of the first select gate to a fourth voltage level; applying a fifth voltage level, higher than the first voltage level, to first and second access lines coupled to memory cells of the strings of memory cells; and increasing a voltage level of the first access line to a sixth voltage level.Type: ApplicationFiled: October 17, 2019Publication date: February 27, 2020Applicant: MICRON TECHNOLOGY, INC.Inventors: Violante Moschiano, Purval S. Sule, Han Liu, Andrea D'Alessandro, Pranav Kalavade, Han Zhao, Shantanu Rajwade
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Patent number: 10514862Abstract: Some embodiments include apparatuses and methods using memory cells and a control unit to suspend an erase operation performed on a first portion of the memory cells and to suspend a program operation performed on a second portion of the memory cells while the erase operation is suspended. The control unit includes register circuitry to store status information indicating that the program operation is suspended while the erase operation is suspended.Type: GrantFiled: July 21, 2016Date of Patent: December 24, 2019Assignee: Micron Technology, Inc.Inventors: Aliasgar S. Madraswala, Purval S. Sule, Karthikeyan Ramamurthi
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Publication number: 20190355431Abstract: Various embodiments, disclosed herein, can include apparatus and methods to perform a one check failure byte (CFBYTE) scheme in programming of a memory device. In programming memory cells in which each memory cell can store multiple bits, the multiple bits being a n-tuple of bits of a set of n-tuples of bits with each n-tuple of the set associated with a level of a set of levels of threshold voltages for the memory cells. Verification of a program algorithm can be structured based on a programming algorithm that proceeds in a progressive manner by placing a threshold voltage of one level/distribution at a time. The routine of this progression can be used to perform just one failure byte check for that specific target distribution only, thus eliminating the need to check failure byte for all subsequent target distribution during every stage of program algorithm. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: June 3, 2019Publication date: November 21, 2019Inventors: Aliasgar S. Madraswala, Kristopher H. Gaewsky, Naveen Vittal Prabhu, Purval S. Sule, Trupti Bemalkhedkar, Nehul N. Tailor, Quan H. Ngo, Dheeraj Srinivasan
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Patent number: 10482974Abstract: Methods include applying a first voltage level to first and second data lines while applying a second, lower, voltage level to first and second select gates connected between the data lines and respective strings of memory cells; decreasing a voltage level of the first data line to a third voltage level; increasing a voltage level of the first select gate to a fourth voltage level; applying a fifth voltage level, higher than the first voltage level, to first and second access lines coupled to memory cells of the strings of memory cells; and increasing a voltage level of the first access line to a sixth voltage level.Type: GrantFiled: August 21, 2018Date of Patent: November 19, 2019Assignee: Micron Technology, Inc.Inventors: Violante Moschiano, Purval S. Sule, Han Liu, Andrea D'Alessandro, Pranav Kalavade, Han Zhao, Shantanu Rajwade
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Patent number: 10446238Abstract: Embodiments include apparatuses, methods, and computer devices including a multi-level NAND memory array and a memory controller coupled to the multi-level NAND memory array. The multi-level NAND memory array may include a first word line and a second word line. The memory controller may receive a first page of data and a second page of data together with a program command to program the first page of data and the second page of data into the multi-level NAND memory array. The memory controller may program the first page of data into a page of the first word line via a first pass, and further program the second page of data into a page of the second word line via a second pass, subsequent to the first pass. Other embodiments may also be described and claimed.Type: GrantFiled: September 27, 2017Date of Patent: October 15, 2019Assignee: Intel CorporationInventors: Aliasgar S. Madraswala, Xin Guo, David B. Carlton, Purval S. Sule
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Publication number: 20190252033Abstract: In connection with data pin timing calibration with a strobe signal, examples provide for determination of pass/fail status of a pin from multiple pass/fail results in a single operation. Determination of pass/fail results for multiple pins based on multiple applied trim offsets can be made in parallel. Accordingly, a time to determine pass/fail results from multiple trim values for a pin can be reduced, which can enable faster power-up of NAND flash devices.Type: ApplicationFiled: October 23, 2018Publication date: August 15, 2019Inventors: Varsha REGULAPATI, Heonwook KIM, Aliasgar S. MADRASWALA, Naga Kiranmayee UPADHYAYULA, Purval S. SULE, Jong Tai PARK, Sriram BALASUBRAHMANYAM, Manjiri M. KATMORE
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Patent number: 10354738Abstract: Various embodiments, disclosed herein, can include apparatus and methods to perform a one check failure byte (CFBYTE) scheme in programming of a memory device. In programming memory cells in which each memory cell can store multiple bits, the multiple bits being a n-tuple of bits of a set of n-tuples of bits with each n-tuple of the set associated with a level of a set of levels of threshold voltages for the memory cells. Verification of a program algorithm can be structured based on a programming algorithm that proceeds in a progressive manner by placing a threshold voltage of one level/distribution at a time. The routine of this progression can be used to perform just one failure byte check for that specific target distribution only, thus eliminating the need to check failure byte for all subsequent target distribution during every stage of program algorithm. Additional apparatus, systems, and methods are disclosed.Type: GrantFiled: September 27, 2017Date of Patent: July 16, 2019Assignee: Micron Technology, Inc.Inventors: Aliasgar S. Madraswala, Kristopher H. Gaewsky, Naveen Vittal Prabhu, Purval S. Sule, Trupti Bemalkhedkar, Nehul N. Tailor, Quan H. Ngo, Dheeraj Srinivasan
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Patent number: 10325665Abstract: A controller for a NAND memory array is presented. In embodiments, the controller may include circuitry to provide bias voltages to a NAND memory array that includes two or more decks of memory cells, and an output interface coupled to the circuitry and to wordlines (WLs) of the memory array. In embodiments, the circuitry, in a deck erase operation may: apply a first set of bias voltages via the output interface to active WLs of at least a first deck of the two or more decks of memory cells to be erased; and apply a second set of bias voltages via the output interface to active WLs of at least a second deck of the two or more decks of memory cells not to be erased, wherein the first set of bias voltages is lower than the second set of bias voltages.Type: GrantFiled: December 8, 2017Date of Patent: June 18, 2019Assignee: Intel CorporationInventors: Richard Fastow, Xin Sun, Uday Chandrasekhar, Krishna K. Parat, Camila Jaramillo, Purval S. Sule, Aliasgar S. Madraswala
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Publication number: 20190096494Abstract: Various embodiments, disclosed herein, can include apparatus and methods to perform a one check failure byte (CFBYTE) scheme in programming of a memory device. In programming memory cells in which each memory cell can store multiple bits, the multiple bits being a n-tuple of bits of a set of n-tuples of bits with each n-tuple of the set associated with a level of a set of levels of threshold voltages for the memory cells. Verification of a program algorithm can be structured based on a programming algorithm that proceeds in a progressive manner by placing a threshold voltage of one level/distribution at a time. The routine of this progression can be used to perform just one failure byte check for that specific target distribution only, thus eliminating the need to check failure byte for all subsequent target distribution during every stage of program algorithm. Additional apparatus, systems, and methods are disclosed.Type: ApplicationFiled: September 27, 2017Publication date: March 28, 2019Inventors: Aliasgar S. Madraswala, Kristopher H. Gaewsky, Naveen Vittal Prabhu, Purval S. Sule, Trupti Bemalkhedkar, Nehul N. Tailor, Quan H. Ngo, Dheeraj Srinivasan
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Publication number: 20190096490Abstract: Embodiments include apparatuses, methods, and computer devices including a multi-level NAND memory array and a memory controller coupled to the multi-level NAND memory array. The multi-level NAND memory array may include a first word line and a second word line. The memory controller may receive a first page of data and a second page of data together with a program command to program the first page of data and the second page of data into the multi-level NAND memory array. The memory controller may program the first page of data into a page of the first word line via a first pass, and further program the second page of data into a page of the second word line via a second pass, subsequent to the first pass. Other embodiments may also be described and claimed.Type: ApplicationFiled: September 27, 2017Publication date: March 28, 2019Inventors: ALIASGAR S. MADRASWALA, XIN GUO, DAVID B. CARLTON, PURVAL S. SULE
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Publication number: 20190043591Abstract: A controller for a NAND memory array is presented. In embodiments, the controller may include circuitry to provide bias voltages to a NAND memory array that includes two or more decks of memory cells, and an output interface coupled to the circuitry and to wordlines (WLs) of the memory array. In embodiments, the circuitry, in a deck erase operation may: apply a first set of bias voltages via the output interface to active WLs of at least a first deck of the two or more decks of memory cells to be erased; and apply a second set of bias voltages via the output interface to active WLs of at least a second deck of the two or more decks of memory cells not to be erased, wherein the first set of bias voltages is lower than the second set of bias voltages.Type: ApplicationFiled: December 8, 2017Publication date: February 7, 2019Inventors: RICHARD FASTOW, XIN SUN, UDAY CHANDRASEKHAR, KRISHNA K. PARAT, CAMILA JARAMILLO, PURVAL S. SULE, ALIASGAR S. MADRASWALA
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Publication number: 20190006016Abstract: A programming of a memory device configurable to reach a plurality of voltage levels is initiated. For each voltage level to be reached, a checkpoint is set up within a sequence of program pulses applied for the programming of the memory device, to determine whether a plurality of memory cells of the memory device have reached the voltage level. The programming of the memory device is aborted, in response to determining at the checkpoint that the plurality of memory cells have not reached the voltage level.Type: ApplicationFiled: June 29, 2017Publication date: January 3, 2019Inventors: Ali KHAKIFIROOZ, Pranav KALAVADE, Shantanu R. RAJWADE, Aliasgar S. MADRASWALA, Uday CHANDRASEKHAR, Purval S. SULE, Sagar UPADHYAY