Patents Assigned to SK keyfoundry Inc.
  • Publication number: 20250150090
    Abstract: An analog-to-digital converter (ADC) and an operation method thereof are provided. The ADC includes: a comparator which compares a signal input through a first input terminal and a signal input through a second input terminal, and outputs an output value according to the comparison result. A successive approximation register receives the output value of the comparator, sets digital signal values from a most significant bit to a least significant bit, and outputs the digital signal values. A digital-to-analog converter receives the digital signal values, and converts it into an analog signal based on a reference voltage Vref, and outputs it to the second input terminal. A noise component is added to the input signal and to the analog signal Vdac'.
    Type: Application
    Filed: January 7, 2025
    Publication date: May 8, 2025
    Applicant: SK keyfoundry Inc.
    Inventor: Hun-Bae CHOI
  • Patent number: 12294381
    Abstract: The analog-to-digital converter (ADC) includes a sample and hold circuit configured to sample an analog input voltage and hold the sampled voltage. The sample and hold circuit includes: an analog switch configured to generate a boosting voltage obtained by adding a constant voltage to the analog input voltage, and output an analog output voltage corresponding to the analog input voltage by using the boosting voltage; and a capacitor in which the analog output voltage is charged.
    Type: Grant
    Filed: February 28, 2023
    Date of Patent: May 6, 2025
    Assignee: SK keyfoundry Inc.
    Inventor: Hunbae Choi
  • Publication number: 20250140328
    Abstract: A memory device includes an eFuse cell array in which unit cells of different types are alternately disposed, and each of the unit cells of different types includes a PN diode, a first NMOS transistor, and a fuse, wherein a first type unit cell and a second type unit cell are connected to each other through a common node, and the first type unit cell and the second type unit cell are disposed in a bilaterally symmetrical structure with respect to the common node.
    Type: Application
    Filed: January 6, 2025
    Publication date: May 1, 2025
    Applicant: SK keyfoundry Inc.
    Inventors: Seongjun PARK, Soyeon KIM, Sungbum PARK, Keesik AHN
  • Patent number: 12289107
    Abstract: A low-power retention flip-flop is provided. The low-power retention flip-flop may include: a master latch configured to output an input signal based on first control signals; a slave latch configured to output the signal from the master latch based on second control signals; and a control logic configured to generate the first control signals based on a clock signal, and provide the generated first control signals to the master latch, and generate the second control signals based on the clock signal and a power down mode signal, and provide the generated second control signals to the slave latch.
    Type: Grant
    Filed: December 13, 2021
    Date of Patent: April 29, 2025
    Assignee: SK keyfoundry Inc.
    Inventors: Wan-Chul Kong, Sungbum Park, Keesik Ahn
  • Patent number: 12288648
    Abstract: A trench capacitor manufacturing method is provided. The method includes forming a deep trench in a wafer, forming a trench capacitor structure including a plurality of dielectric films and a plurality of conductive layers in the deep trench; determining if the wafer has a tensile stress based on the forming of the trench capacitor structure; performing a high temperature heat treatment to the trench capacitor structure to change a form of the wafer to a direction that offsets the tensile stress; forming an inter-layer insulating film on the trench capacitor structure; and forming a metal interconnect on the inter-layer insulating film.
    Type: Grant
    Filed: May 30, 2024
    Date of Patent: April 29, 2025
    Assignee: SK keyfoundry Inc.
    Inventor: Seung Mo Jo
  • Publication number: 20250124993
    Abstract: A non-volatile memory device includes a memory cell array including a plurality of memory cells; and a sense amplifier configured to read data from the plurality of memory cells and output the read data. The sense amplifier includes a first stage sense amplifier configured to sense a voltage difference between a reference voltage and a voltage of a bit line connected to at least one memory cell among the plurality of memory cells, and perform a primary amplification of the sensed voltage difference; and a second stage sense amplifier configured to perform a secondary amplification of a first result of the primary amplification and output a second result of the secondary amplification.
    Type: Application
    Filed: December 19, 2024
    Publication date: April 17, 2025
    Applicant: SK keyfoundry Inc.
    Inventors: Seong Jun PARK, Sung Bum PARK, Kee Sik AHN
  • Patent number: 12278177
    Abstract: A method of manufacturing a semiconductor device is provided. The method includes depositing a first interconnect metal layer on a substrate; depositing a first barrier metal layer on the first interconnect metal layer; depositing a first dielectric layer on the first barrier metal layer; depositing a second barrier metal layer on the first dielectric layer; etching the second barrier metal layer to form a MIM capacitor region and a thin film resistor region; forming a hard mask on the second barrier metal layer and the first dielectric layer; forming an isolated interconnect pattern between the MIM capacitor region and the thin film resistor region; depositing an inter-metal dielectric layer on the hard mask; forming Via holes in the MIM capacitor region and the thin film resistor region, and filling the Via holes with metal to form a Via contact layer.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: April 15, 2025
    Assignee: SK keyfoundry Inc.
    Inventor: Jeong Geun Bak
  • Patent number: 12260915
    Abstract: A non-volatile memory device includes a first fuse cell array and a second fuse cell array, spaced from each other; a first ground ring region and a second ground ring region disposed to surround the first fuse cell array and the second fuse cell array, respectively; a third ground ring region configured to connect the first ground ring region and the second ground ring region; a power ring region disposed to surround the first ground ring region and the second ground ring region; and an address decoder, disposed between the first fuse cell array and the second fuse cell array, configured to supply a word line signal to each of the first fuse cell array and the second fuse cell array. The ground ring regions supply a ground voltage to each of the first fuse cell array and the second fuse cell array.
    Type: Grant
    Filed: March 14, 2022
    Date of Patent: March 25, 2025
    Assignee: SK keyfoundry Inc.
    Inventors: Seong Jun Park, Jong Min Cho, Sung Bum Park, Kee Sik Ahn
  • Patent number: 12243609
    Abstract: An octo mode program and erase operation method to reduce test time in a non-volatile memory device. M/8 word lines corresponding to an octo row, among M word lines, are simultaneously selected, and a write voltage is applied to memory cells connected to M/8 word lines corresponding to the octo row. A voltage that is different from the write voltage is applied to memory cells connected to the rest of word lines, except for M/8 word lines corresponding to the octo row, when the octo signal is applied to an address decoder.
    Type: Grant
    Filed: November 30, 2021
    Date of Patent: March 4, 2025
    Assignee: SK keyfoundry Inc.
    Inventors: Weon-Hwa Jeong, Young Chul Seo, Chul Geun Lim, Yong Hwan Kim, Sung Bum Park, Kee Sik Ahn
  • Patent number: 12237337
    Abstract: A first high voltage semiconductor element, disposed in a substrate, includes first trenches; a first source region and a first drain region; first drift regions having respective ones partially surround the first source region and the first drain region; a first gate insulating layer and a first gate electrode disposed between the first drift regions; and a first high voltage well surrounding the first drift regions. A second high voltage semiconductor element, disposed in the substrate, includes second trenches; a second source region and a second drain region; second drift regions having respective ones partially surround the second source region and the second drain region; a second gate insulating layer and a second gate electrode disposed between the second drift regions; and a second high voltage well surrounding the second drift regions. Depths of the second trenches are disposed to be greater than depths of the first trenches.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: February 25, 2025
    Assignee: SK keyfoundry Inc.
    Inventors: Boseok Oh, Kwangho Park, Jiman Kim, Taekyun Yoo
  • Patent number: 12230337
    Abstract: A memory device includes an eFuse cell array in which unit cells of different types are alternately disposed, and each of the unit cells of different types includes a PN diode, a first NMOS transistor, and a fuse, wherein a first type unit cell and a second type unit cell are connected to each other through a common node, and the first type unit cell and the second type unit cell are disposed in a bilaterally symmetrical structure with respect to the common node.
    Type: Grant
    Filed: January 13, 2023
    Date of Patent: February 18, 2025
    Assignee: SK keyfoundry Inc.
    Inventors: Seongjun Park, Soyeon Kim, Sungbum Park, Keesik Ahn
  • Patent number: 12231144
    Abstract: An analog-to-digital converter (ADC) and an operation method thereof are provided. The ADC includes: a comparator which compares a signal input through a first input terminal and a signal input through a second input terminal, and outputs an output value according to the comparison result. A successive approximation register receives the output value of the comparator, sets digital signal values from a most significant bit to a least significant bit, and outputs the digital signal values. A digital-to-analog converter receives the digital signal values, and converts it into an analog signal based on a reference voltage Vref, and outputs it to the second input terminal. A noise component is added to the input signal and to the analog signal Vdac?.
    Type: Grant
    Filed: August 22, 2023
    Date of Patent: February 18, 2025
    Assignee: SK keyfoundry Inc.
    Inventor: Hun-Bae Choi
  • Publication number: 20250056863
    Abstract: A manufacturing method of a semiconductor device, includes providing a substrate; forming a stacked gate, including a floating gate and a control gate, on the substrate; forming a stacked gate by a deposition of a select gate conductive layer on the stacked gate; forming a trench in the stacked gate by etching the stacked gate to separate a first select gate pattern and a second select gate pattern; and forming a first select gate, a second select gate, a first transistor, and a second transistor simultaneously through an etch-back process of the stacked gate
    Type: Application
    Filed: October 31, 2024
    Publication date: February 13, 2025
    Applicant: SK keyfoundry Inc.
    Inventors: Min Kuck CHO, Jae Hoon KIM, Seung Hoon LEE
  • Patent number: 12224025
    Abstract: Various embodiments of the present disclosure relate to a non-volatile memory device including a sense amplifier and an operation method thereof. The non-volatile memory device may include: a memory cell array comprising a plurality of memory cells; and the sense amplifier configured to read data of the plurality of memory cells and output the read data. The sense amplifier may include: a first stage sense amplifier configured to sense a voltage difference between a reference voltage and a voltage of a bit line connected to at least one memory cell among the plurality of memory cells, and perform a primary amplification of the sensed voltage difference; and a second stage sense amplifier configured to perform a secondary amplification of a first result of the primary amplification and output a second result of the secondary amplification.
    Type: Grant
    Filed: November 6, 2023
    Date of Patent: February 11, 2025
    Assignee: SK Keyfoundry Inc.
    Inventors: Seong Jun Park, Sung Bum Park, Kee Sik Ahn
  • Patent number: 12224211
    Abstract: The present disclosure provides a method of manufacturing a semiconductor device includes forming a first gate insulating film on a substrate for a first device, forming a first gate electrode on the first gate insulating film; forming a mask pattern on the first gate electrode to expose opposing end portions of the first gate electrode, wherein a length of the mask pattern is smaller than a length of the first gate electrode; performing ion implantation through the exposed opposing end portions of the first gate electrode using the mask pattern to simultaneously form first and second drift regions in the substrate; forming spacers on sidewalls of the first gate electrode, respectively; and forming a first source region and a first drain region in the first and second drift regions, respectively.
    Type: Grant
    Filed: May 18, 2022
    Date of Patent: February 11, 2025
    Assignee: SK keyfoundry Inc.
    Inventors: Hee Hwan Ji, Ji Man Kim, Song Hwa Hong, Bo Seok Oh
  • Patent number: 12225722
    Abstract: A non-volatile memory device, includes a source region and a drain region disposed in a channel length direction on a substrate; a flash cell, including a floating gate and a control gate, disposed between the source region and the drain region; a selection gate disposed between the source region and the flash cell; a selection line connecting the selection gate; a word line connecting the control gate; a common source line connected to the source region; and a bit line connected to the drain region.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: February 11, 2025
    Assignee: SK keyfoundry Inc.
    Inventors: Jin Shik Choi, Su Jin Kim, Won Kyu Lim
  • Publication number: 20250048712
    Abstract: A deep trench layout implementation for a semiconductor device is provided. The semiconductor device includes an isolation film with a shallow depth, an active area, and a gate electrode formed in a substrate; a deep trench isolation surrounding the gate electrode and having one or more trench corners; and a gap-fill insulating film formed inside the deep trench isolation. The one or more trench corners is formed in a slanted shape from a top view.
    Type: Application
    Filed: October 23, 2024
    Publication date: February 6, 2025
    Applicant: SK keyfoundry Inc.
    Inventors: Yang Beom KANG, Sang Uk LEE
  • Publication number: 20250031406
    Abstract: A semiconductor device and a manufacturing method thereof are provided. The semiconductor device includes: a first conductive type buried layer disposed on a substrate; a first conductive type deep well region, a second conductive type body region, and a first conductive type drift region which are disposed on the first conductive type buried layer; a source region disposed in the second conductive type body region; a drain region disposed in the first conductive type deep well region; and a gate electrode disposed on the second conductive type body region and the first conductive type drift region.
    Type: Application
    Filed: October 3, 2024
    Publication date: January 23, 2025
    Applicant: SK keyfoundry Inc.
    Inventor: Hanseob CHA
  • Patent number: 12206002
    Abstract: A deep trench layout implementation for a semiconductor device is provided. The semiconductor device includes an isolation film with a shallow depth, an active area, and a gate electrode formed in a substrate; a deep trench isolation surrounding the gate electrode and having one or more trench corners; and a gap-fill insulating film formed inside the deep trench isolation. The one or more trench corners is formed in a slanted shape from a top view.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: January 21, 2025
    Assignee: SK keyfoundry Inc.
    Inventors: Yang Beom Kang, Sang Uk Lee
  • Patent number: 12191387
    Abstract: A semiconductor device and a manufacturing method thereof are provided. The semiconductor device includes: a first conductive type buried layer disposed on a substrate; a first conductive type deep well region, a second conductive type body region, and a first conductive type drift region which are disposed on the first conductive type buried layer; a source region disposed in the second conductive type body region; a drain region disposed in the first conductive type deep well region; and a gate electrode disposed on the second conductive type body region and the first conductive type drift region.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: January 7, 2025
    Assignee: SK keyfoundry Inc.
    Inventor: Hanseob Cha