Patents by Inventor Chang Ki Baek

Chang Ki Baek 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).

  • Publication number: 20240030888
    Abstract: There is provided a substrate for a surface acoustic wave device, comprising a 2-dimensional (2D) crystalline hexagonal boron nitride layer, wherein a surface acoustic wave of the surface acoustic wave device is transmitted through the 2D crystalline hexagonal boron nitride layer.
    Type: Application
    Filed: November 17, 2021
    Publication date: January 25, 2024
    Applicant: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION
    Inventors: Byoung Don KONG, Seok Hyun YOON, Hyeon Su CHO, Seung Ho LEE, Gyeong Min SEO, Chang Ki BAEK
  • Patent number: 11868153
    Abstract: A semiconductor integrated circuit device includes a current leakage detector, a leakage compensation pulse generator, and a leakage compensation voltage generator. The current leakage detector is configured to compare an internal voltage signal with a plurality of reference voltage signals with different levels to generate a current leakage state signal. The leakage compensation pulse generator is configured to generate a bias level compensation signal based on the current leakage state signal and a temperature state signal. The leakage compensation voltage generator is configured to generate the internal voltage signal based on the bias level compensation signal.
    Type: Grant
    Filed: December 30, 2021
    Date of Patent: January 9, 2024
    Assignee: SK hynix Inc.
    Inventors: Min Wook Oh, Chang Ki Baek
  • Patent number: 11664382
    Abstract: A memory device includes at least one semiconductor layer having a double PN junction, and an anode and a cathode which simultaneously contact the semiconductor layer, wherein a junction between the semiconductor layer and the anode is a Schottky junction, and a junction between the semiconductor layer and the cathode is an Ohmic junction. In addition, a capacitor-less memory device includes at least one semiconductor layer including a double PN junction, a control gate which contacts the semiconductor layer, and an anode and a cathode which simultaneously contact the semiconductor layer, wherein a junction between the semiconductor layer and the anode is a Schottky junction, and a junction between the semiconductor layer and the cathode is an Ohmic junction. Methods of operating the memory device and the capacitor-less memory device are also disclosed.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: May 30, 2023
    Assignee: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION
    Inventors: Chang-Ki Baek, Gayoung Kim, Byoung-Don Kong, Hyangwoo Kim
  • Publication number: 20230072253
    Abstract: A semiconductor integrated circuit device includes a current leakage detector, a leakage compensation pulse generator, and a leakage compensation voltage generator. The current leakage detector is configured to compare an internal voltage signal with a plurality of reference voltage signals with different levels to generate a current leakage state signal. The leakage compensation pulse generator is configured to generate a bias level compensation signal based on the current leakage state signal and a temperature state signal. The leakage compensation voltage generator is configured to generate the internal voltage signal based on the bias level compensation signal.
    Type: Application
    Filed: December 30, 2021
    Publication date: March 9, 2023
    Applicant: SK hynix Inc.
    Inventors: Min Wook OH, Chang Ki BAEK
  • Publication number: 20220028857
    Abstract: A memory device includes at least one semiconductor layer having a double PN junction, and an anode and a cathode which simultaneously contact the semiconductor layer, wherein a junction between the semiconductor layer and the anode is a Schottky junction, and a junction between the semiconductor layer and the cathode is an Ohmic junction. In addition, a capacitor-less memory device includes at least one semiconductor layer including a double PN junction, a control gate which contacts the semiconductor layer, and an anode and a cathode which simultaneously contact the semiconductor layer, wherein a junction between the semiconductor layer and the anode is a Schottky junction, and a junction between the semiconductor layer and the cathode is an Ohmic junction. Methods of operating the memory device and the capacitor-less memory device are also disclosed.
    Type: Application
    Filed: June 22, 2021
    Publication date: January 27, 2022
    Inventors: Chang-Ki BAEK, Gayoung KIM, Byoung-Don KONG, Hyangwoo KIM
  • Patent number: 11200944
    Abstract: A semiconductor memory apparatus includes a plurality of memory cells. Each memory cell includes a switching element and a storage capacitor. The semiconductor memory apparatus further includes a first word line extended from a part of the plurality of memory cells, a second word line which is enabled after the first word line is enabled in a refresh mode for refreshing data stored in the storage capacitor, a word line control circuit configured to enable and disable the first word line. The word line control circuit comprises at least one switch that couples and decouples the first word line and the second word line.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: December 14, 2021
    Assignee: SK hynix Inc.
    Inventors: Joon Woo Choi, Chang Ki Baek
  • Patent number: 11049533
    Abstract: A semiconductor device includes: a command generation circuit configured to generate a write strobe signal; a pipe control circuit configured to generate first to fourth input control signals and first to fourth output control signals which are sequentially enabled, when first and second write command pulses are inputted, and generate first to fourth internal output control signals after a preset period; and an address processing circuit configured to latch an address inputted through a command address, when the write strobe signal and the first to fourth input control signals are inputted, generate a bank group address and a column address from the latched address, when the first to fourth output control signals are inputted, and generate the bank group address and the column address by inverting the latched address, when the first to fourth internal output control signals are inputted.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: June 29, 2021
    Assignee: SK hynix Inc.
    Inventors: Min Wook Oh, Myung Kyun Kwak, Min O Kim, Chang Ki Baek
  • Publication number: 20210183417
    Abstract: A semiconductor device includes: a command generation circuit configured to generate a write strobe signal; a pipe control circuit configured to generate first to fourth input control signals and first to fourth output control signals which are sequentially enabled, when first and second write command pulses are inputted, and generate first to fourth internal output control signals after a preset period; and an address processing circuit configured to latch an address inputted through a command address, when the write strobe signal and the first to fourth input control signals are inputted, generate a bank group address and a column address from the latched address, when the first to fourth output control signals are inputted, and generate the bank group address and the column address by inverting the latched address, when the first to fourth internal output control signals are inputted.
    Type: Application
    Filed: May 14, 2020
    Publication date: June 17, 2021
    Applicant: SK hynix Inc.
    Inventors: Min Wook OH, Myung Kyun KWAK, Min O KIM, Chang Ki BAEK
  • Publication number: 20200381038
    Abstract: A semiconductor memory apparatus includes a plurality of memory cells. Each memory cell includes a switching element and a storage capacitor. The semiconductor memory apparatus further includes a first word line extended from a part of the plurality of memory cells, a second word line which is enabled after the first word line is enabled in a refresh mode for refreshing data stored in the storage capacitor, a word line control circuit configured to enable and disable the first word line. The word line control circuit comprises at least one switch that couples and decouples the first word line and the second word line.
    Type: Application
    Filed: August 4, 2020
    Publication date: December 3, 2020
    Applicant: SK hynix Inc.
    Inventors: Joon Woo CHOI, Chang Ki BAEK
  • Patent number: 10741240
    Abstract: A semiconductor memory apparatus includes a word line control circuit configured to enable and disable a word line, wherein the word line control circuit comprises a switch which couples and decouples the word line to and from at least one other word line.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: August 11, 2020
    Assignee: SK hynix Inc.
    Inventors: Joon Woo Choi, Chang Ki Baek
  • Patent number: 10379786
    Abstract: A semiconductor device may include a data storage region, a parity storage region and an error correction circuit. The data storage region may be configured to store first data and second data. The parity storage region may be configured to store a parity. The error correction circuit may be configured to correct an error of the first data or an error of the second data and the parity, based on a transmission selection signal.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: August 13, 2019
    Assignee: SK hynix Inc.
    Inventors: Mun Seon Jang, Saeng Hwan Kim, Chang Ki Baek, Jae Woong Yun
  • Publication number: 20190198086
    Abstract: A semiconductor memory apparatus includes a word line control circuit configured to enable and disable a word line, wherein the word line control circuit comprises a switch which couples and decouples the word line to and from at least one other word line.
    Type: Application
    Filed: August 14, 2018
    Publication date: June 27, 2019
    Applicant: SK hynix Inc.
    Inventors: Joon Woo CHOI, Chang Ki BAEK
  • Publication number: 20190148615
    Abstract: The present invention relates to a vertical nanowire thermoelectric device which includes a heat emitting portion, a substrate disposed on the heat emitting portion and including doping regions having a first n-type doping region, a first p-type doping region, a second n-type doping region, and a second p-type doping region which are arranged to be spaced apart from each other, vertical nanowire arrays including a first n-type nanowire array, a first p-type nanowire array, a second n-type nanowire array, and a second p-type nanowire array which are formed on the first n-type doping region, the first p-type doping region, the second n-type doping region, and the second p-type doping region, respectively, a lower silicide layer formed in the doping regions and a connection region which connects the first p-type doping region and the second n-type doping region, an upper silicide layer formed on the vertical nanowire arrays, a first upper electrode configured to electrically connect an upper end of the first n-t
    Type: Application
    Filed: November 12, 2018
    Publication date: May 16, 2019
    Inventors: Chang Ki BAEK, Ki Hyun Kim, Seung Ho Lee
  • Patent number: 10014073
    Abstract: A semiconductor device may include a syndrome generation circuit and a failure detection circuit. The syndrome generation circuit may generate a syndrome signal corresponding to a pattern of an output data signal. The failure detection circuit may detect the syndrome signal and sequentially store the syndrome signal to generate a first syndrome signal and a second syndrome signal if an error is detected from the syndrome signal. The failure detection circuit may generate a failure detection signal which is enabled if a logic level combination of the first syndrome signal is different from a logic level combination of the second syndrome signal.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: July 3, 2018
    Assignee: SK hynix Inc.
    Inventors: Mun Seon Jang, Saeng Hwan Kim, In Tae Kim, Chang Ki Baek
  • Patent number: 9875994
    Abstract: A multi-chip package may include a plurality of semiconductor chips integrated in a single package and sharing one or more command pins. Each of the semiconductor chips may include: a command decoder suitable for decoding a command to generate a buffer enable signal, a mode enable signal, and a mode signal; a data input buffer suitable for buffering data to output internal data, in response to the buffer enable signal and a common test mode signal; a command controller suitable for receiving the mode enable signal to output a test mode enable signal by selectively blocking the mode enable signal based on the internal data and the common test mode signal; and a test controller suitable for generating the common test mode signal and a test mode signal, based on the test mode enable signal and the mode signal.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: January 23, 2018
    Assignee: SK Hynix Inc.
    Inventors: Chang-Ki Baek, Joon-Woo Choi
  • Publication number: 20170372796
    Abstract: A semiconductor device may include a syndrome generation circuit and a failure detection circuit. The syndrome generation circuit may generate a syndrome signal corresponding to a pattern of an output data signal. The failure detection circuit may detect the syndrome signal and sequentially store the syndrome signal to generate a first syndrome signal and a second syndrome signal if an error is detected from the syndrome signal. The failure detection circuit may generate a failure detection signal which is enabled if a logic level combination of the first syndrome signal is different from a logic level combination of the second syndrome signal.
    Type: Application
    Filed: December 7, 2016
    Publication date: December 28, 2017
    Inventors: Mun Seon JANG, Saeng Hwan KIM, In Tae KIM, Chang Ki BAEK
  • Publication number: 20170337105
    Abstract: A semiconductor device may include a data storage region, a parity storage region and an error correction circuit. The data storage region may be configured to store first data and second data. The parity storage region may be configured to store a parity. The error correction circuit may be configured to correct an error of the first data or an error of the second data and the parity, based on a transmission selection signal.
    Type: Application
    Filed: September 7, 2016
    Publication date: November 23, 2017
    Inventors: Mun Seon JANG, Saeng Hwan KIM, Chang Ki BAEK, Jae Woong YUN
  • Patent number: 9792230
    Abstract: A data input circuit of a semiconductor apparatus may include a plurality of parallelizing units corresponding to a plurality of input/output pads in a one-to-one manner, and a data control block configured to transmit serial test data, which may be input through less than all of the plurality of input/output pads, to the plurality of parallelizing units in response to first and second control signals.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: October 17, 2017
    Assignee: SK hynix Inc.
    Inventors: Joon Woo Choi, Chang Ki Baek
  • Publication number: 20170084580
    Abstract: A multi-chip package may include a plurality of semiconductor chips integrated in a single package and sharing one or more command pins. Each of the semiconductor chips may include: a command decoder suitable for decoding a command to generate a buffer enable signal, a mode enable signal, and a mode signal; a data input buffer suitable for buffering data to output internal data, in response to the buffer enable signal and a common test mode signal; a command controller suitable for receiving the mode enable signal to output a test mode enable signal by selectively blocking the mode enable signal based on the internal data and the common test mode signal; and a test controller suitable for generating the common test mode signal and a test mode signal, based on the test mode enable signal and the mode signal.
    Type: Application
    Filed: February 18, 2016
    Publication date: March 23, 2017
    Inventors: Chang-Ki BAEK, Joon-Woo CHOI
  • Patent number: 9559230
    Abstract: Disclosed are a solar cell and a method for manufacturing the same. The solar cell comprises asymmetric nanowires each of which has an angled sidewall, and thus incident light can be concentrated at a p-n junction portion by means of a total reflection phenomenon of light caused by the difference between the refractive indices of a semiconductor layer and a transparent electrode layer, and light absorption may increase due to an increase in the light travel distance, thus improving photoelectric efficiency. Further, the method for manufacturing the solar cell involves etching a substrate and integrally forming the substrate and a p-type semiconductor layer including the asymmetric nanowires each of which has the angled sidewalls, thereby enabling reduced manufacturing costs and simple and easy manufacture of the nanowires having the angled sidewalls.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: January 31, 2017
    Assignee: POSTECH ACADEMY—INDUSTRY FOUNDATION
    Inventors: Chang Ki Baek, Yoon Ha Jeong, Seong Wook Choi, Tai Uk Rim, Soo Young Park, Myung Dong Ko