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).

  • Patent number: 9461157
    Abstract: The present invention provides a nanowire sensor comprising nanowires, in which the nanowires are stacked to form a three-dimensional structure so that they have a large exposed surface area compared to that of a conventional straight nanowire sensor in the same limited area, thereby increasing the probability of attachment of a target material to the nanowires to thereby increase the measurement sensitivity of the sensor. Thus, a change in the electrical conductivity (conductance or resistance) of the nanowires can be sensed with higher sensitivity, suggesting that the sensor has increased sensitivity.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: October 4, 2016
    Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Jeong Soo Lee, Yoon Ha Jeong, Sung Ho Kim, Ki Hyun Kim, Tai Uk Rim, Chang Ki Baek
  • Patent number: 9396779
    Abstract: A semiconductor memory device includes a clock input block suitable for generating first and second internal clocks in response to an external clock, a clock correction block suitable for generating a data clock by correcting a duty ratio of the first and second internal clocks in response to a signal activated in an initial operation mode of the semiconductor memory device, and a data control block suitable for controlling data in synchronization with the data clock.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: July 19, 2016
    Assignee: SK Hynix Inc.
    Inventor: Chang-Ki Baek
  • Patent number: 9286999
    Abstract: A semiconductor device includes a first input/output (I/O) part buffering command/address (C/A) signals inputted through a first pad part to generate delay address signals, an internal address generator generating a plurality of internal address signals according to a level combination of the delay address signals, and a second I/O part including a plurality of fuses selected by the plurality of internal address signals in a test mode. The plurality of fuses of the second I/O part are programmed according to logic levels of data inputted to the second I/O part through a second pad part to control I/O characteristics of the second I/O part.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: March 15, 2016
    Assignee: SK Hynix Inc.
    Inventors: Joon Woo Choi, Chang Ki Baek
  • Publication number: 20160042772
    Abstract: A semiconductor device may include a first input/output unit and a second input/output unit. The first input/output unit may operate in synchronization with an internal clock signal to output a first data as a first output data in response to a control signal or to output a transfer data generated from a second data as the first output data in response to the control signal. The second input/output unit may operate in synchronization with the internal clock signal to generate the transfer data while in a test mode. The first output data may be transmitted to a first pad.
    Type: Application
    Filed: October 29, 2014
    Publication date: February 11, 2016
    Inventors: Joon Woo CHOI, Chang Ki BAEK
  • Publication number: 20160004649
    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: Application
    Filed: October 14, 2014
    Publication date: January 7, 2016
    Inventors: Joon Woo CHOI, Chang Ki BAEK
  • Publication number: 20150380486
    Abstract: An electronic device includes: a substrate; a nanowire mesh formed on the substrate and including a plurality of crossing points cross-coupled with a plurality of unit nanowires; and a first electrode and a second electrode electrically connected to the nanowire mesh.
    Type: Application
    Filed: June 26, 2015
    Publication date: December 31, 2015
    Inventors: Taiuk RIM, Chang-Ki BAEK, Jae-Joon KIM
  • Publication number: 20150303289
    Abstract: The present invention provides a nanowire sensor comprising nanowires, in which the nanowires are stacked to form a three-dimensional structure so that they have a large exposed surface area compared to that of a conventional straight nanowire sensor in the same limited area, thereby increasing the probability of attachment of a target material to the nanowires to thereby increase the measurement sensitivity of the sensor. Thus, a change in the electrical conductivity (conductance or resistance) of the nanowires can be sensed with higher sensitivity, suggesting that the sensor has increased sensitivity.
    Type: Application
    Filed: November 22, 2013
    Publication date: October 22, 2015
    Inventors: Jeong Soo LEE, Yoon Ha JEONG, Sung Ho KIM, Ki Hyun KIM, Tai Uk RIM, Chang Ki BAEK
  • Publication number: 20150287448
    Abstract: A semiconductor memory device includes a clock input block suitable for generating first and second internal clocks in response to an external clock, a clock correction block suitable for generating a data clock by correcting a duty ratio of the first and second internal clocks in response to a signal activated in an initial operation mode of the semiconductor memory device, and a data control block suitable for controlling data in synchronization with the data clock.
    Type: Application
    Filed: October 23, 2014
    Publication date: October 8, 2015
    Inventor: Chang-Ki BAEK
  • Patent number: 9099543
    Abstract: A nanowire sensor having a nanowire in a network structure includes: source and drain electrodes formed over a substrate; a nanowire formed between the source and drain electrodes and having a network structure in which patterns of intersections are repeated; and a detection material fixed to the nanowire and selectively reacting with a target material introduced from outside.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: August 4, 2015
    Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Jeong Soo Lee, Yoon Ha Jeong, Tai Uk Rim, Chang Ki Baek, Sung Ho Kim, Ki Hyun Kim
  • Patent number: 9076538
    Abstract: A test mode decoder configured to decode a test mode signal inputted a plurality of times and to generate preliminary fuse information, a count latch configured to count the preliminary fuse information in response to a count clock signal and to generate fuse information, and a fuse array block configured to store the fuse information can be included.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: July 7, 2015
    Assignee: SK Hynix Inc.
    Inventor: Chang Ki Baek
  • Publication number: 20150062997
    Abstract: A test mode decoder configured to decode a test mode signal inputted a plurality of times and to generate preliminary fuse information, a count latch configured to count the preliminary fuse information in response to a count clock signal and to generate fuse information, and a fuse array block configured to store the fuse information can be included.
    Type: Application
    Filed: December 9, 2013
    Publication date: March 5, 2015
    Applicant: SK hynix Inc.
    Inventor: Chang Ki BAEK
  • Patent number: 8890583
    Abstract: Data transmission circuits are provided. The data transmission circuit includes a control signal generator and an output driver. The control signal generator generates a pull-up control signal and a pull-down control signal by using a count signal that changes in response to a clock signal during a drive control period. The output driver receives an internal data signal and drives a transmission data signal in response to the pull-up control signal and the pull-down control signal.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: November 18, 2014
    Assignee: SK Hynix Inc.
    Inventor: Chang Ki Baek
  • Publication number: 20140326305
    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: Application
    Filed: August 17, 2012
    Publication date: November 6, 2014
    Inventors: Chang Ki Baek, Yoon Ha Jeong, Seong Wook Choi, Tai Uk Rim, Soo Young Park, Myung Dong Ko
  • Publication number: 20140292390
    Abstract: Data transmission circuits are provided. The data transmission circuit includes a control signal generator and an output driver. The control signal generator generates a pull-up control signal and a pull-down control signal by using a count signal that changes in response to a clock signal during a drive control period. The output driver receives an internal data signal and drives a transmission data signal in response to the pull-up control signal and the pull-down control signal.
    Type: Application
    Filed: August 9, 2013
    Publication date: October 2, 2014
    Applicant: SK hynix Inc.
    Inventor: Chang Ki BAEK
  • Patent number: 8803566
    Abstract: An output driver circuit includes a driving control signal generation block configured to compare a power supply voltage and a reference voltage and generate first and second driving control signals and first and second inverted driving control signals; a preliminary driving block configured to drive a pull-up driving signal and a pull-down driving signal with driving strengths set according to the first and second driving control signals and the first and second inverted driving control signals; and a driving block configured to drive output data in response to the pull-up driving signal and the pull-down driving signal.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: August 12, 2014
    Assignee: SK Hynix Inc.
    Inventor: Chang Ki Baek
  • Publication number: 20140034907
    Abstract: A nanowire sensor having a nanowire in a network structure includes: source and drain electrodes formed over a substrate; a nanowire formed between the source and drain electrodes and having a network structure in which patterns of intersections are repeated; and a detection material fixed to the nanowire and selectively reacting with a target material introduced from outside.
    Type: Application
    Filed: March 19, 2012
    Publication date: February 6, 2014
    Inventors: Jeong Soo Lee, Yoon Ha Jeong, Tai Uk Rim, Chang Ki Baek, Sung Ho Kim, Ki Hyun Kim
  • Publication number: 20130307590
    Abstract: An output driver circuit includes a driving control signal generation block configured to compare a power supply voltage and a reference voltage and generate first and second driving control signals and first and second inverted driving control signals; a preliminary driving block configured to drive a pull-up driving signal and a pull-down driving signal with driving strengths set according to the first and second driving control signals and the first and second inverted driving control signals; and a driving block configured to drive output data in response to the pull-up driving signal and the pull-down driving signal.
    Type: Application
    Filed: December 18, 2012
    Publication date: November 21, 2013
    Applicant: SK hynix Inc.
    Inventor: Chang Ki BAEK
  • Patent number: 8437207
    Abstract: An apparatus for measuring data setup/hold time is capable of effectively measuring a setup/hold time of data, and includes a data generating unit for delaying an external clock signal according to counting signals and generating an internal clock signal and data signals from the delayed external clock signal in response to test signals, a flag signal generating unit for generating flag signals according to the internal clock signal and the data signals, and a counter for producing the counting signals in response to the flag signals.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: May 7, 2013
    Assignee: Hynix Semiconductor Inc.
    Inventor: Chang Ki Baek
  • Publication number: 20120106266
    Abstract: An apparatus for measuring data setup/hold time is capable of effectively measuring a setup/hold time of data, and includes a data generating unit for delaying an external clock signal according to counting signals and generating an internal clock signal and data signals from the delayed external clock signal in response to test signals, a flag signal generating unit for generating flag signals according to the internal clock signal and the data signals, and a counter for producing the counting signals in response to the flag signals.
    Type: Application
    Filed: January 9, 2012
    Publication date: May 3, 2012
    Inventor: Chang Ki Baek
  • Patent number: 8116155
    Abstract: An apparatus for measuring data setup/hold time is capable of effectively measuring a setup/hold time of data, and includes a data generating unit for delaying an external clock signal according to counting signals and generating an internal clock signal and data signals from the delayed external clock signal in response to test signals, a data latch unit for latching buffered data signals in synchronization with the internal clock signal, wherein the buffered data signals are produced by buffering the data signals, a flag signal generating unit for generating flag signals from the latched data signals latched in the data latch unit in response to the test signals, and a counter for producing the counting signals in response to the flag signals.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: February 14, 2012
    Assignee: Hynix Semiconductor Inc.
    Inventor: Chang Ki Baek