Patents by Inventor Yong Chang

Yong Chang 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).

  • METHODS AND APPARATUS FOR PLANNING AND DYNAMICALLY UPDATING SAMPLING OPERATIONS WHILE DRILLING IN A SUBTERRANEAN FORMATION
    Publication number: 20110266056
    Abstract: Methods and apparatus for planning and dynamically updating sampling operations while drilling in a subterranean formation are described. An example method of planning a sampling while drilling operation for a subterranean formation includes identifying a plurality of processes and related parameters, the processes including drilling and sampling processes and the related parameters including drilling and sampling parameters. The example method also involves processing the parameters for each of the processes via a simulation engine to generate predictions associated with sampling the formation, the simulation engine including at least one of a wellbore hydraulics simulator, a mudcake simulator, a formation flow simulator, or a tool response simulator.
    Type: Application
    Filed: October 28, 2009
    Publication date: November 3, 2011
    Inventors: Julian J. Pop, Yong Chang
  • Phase change memory device and method for manufacturing the same
    Patent number: 8049199
    Abstract: A phase change memory device and a method for manufacturing the same. The method includes the steps of defining bottom electrode contact holes by removing portions of an insulation layer, to expose bottom electrodes, on a semiconductor substrate on which the bottom electrodes and the insulation layer are sequentially formed; forming amorphous silicon spacers on inner sidewalls of the bottom electrode contact holes; and forming bottom electrode contacts in the bottom electrode contact holes.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: November 1, 2011
    Assignee: Hynix Semiconductor Inc.
    Inventors: Yong Seok Eun, Su Jin Chae, Keum-Bum Lee, Heon-Yong Chang, Min-Yong Lee
  • Phase change memory device to prevent thermal cross-talk and method for manufacturing the same
    Patent number: 8049198
    Abstract: A phase change memory device for preventing thermal cross-talk includes lower electrodes respectively formed in a plurality of phase change cell regions of a semiconductor substrate. A first insulation layer is formed on the semiconductor substrate including the lower electrodes having holes for exposing the respective lower electrodes. Heaters are formed on the surfaces of the respective holes to contact the lower electrodes. A second insulation layer is formed to fill the holes in which the heaters are formed. A mask pattern is then formed on the first and second insulation layers, including the heaters, to have openings that expose portions of the respective heaters having a constant pitch. A phase change layer is formed on the mask pattern including the exposed portions of the heaters and the first and second insulation layers and subsequently, upper electrodes are formed on the phase change layer.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: November 1, 2011
    Assignee: Hynix Semiconductor Inc.
    Inventor: Heon Yong Chang
  • COMMUNICATION SYSTEM HAVING PLURAL TERMINALS AND METHOD FOR CONTROLLING TERMINAL IN COMMUNICATION SYSTEM
    Publication number: 20110264914
    Abstract: A method and communication system for assigning the control authorization for controlling functions of a device from a terminal to another terminal in a communication system is provided. Through the method, it is possible to simplify the authentication process of a terminal having the communication function based on the short messaging service, and to reduce the security information size generated in the authentication process.
    Type: Application
    Filed: April 21, 2011
    Publication date: October 27, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Eun Hui BAE, Yong Chang, Hyoung Kyu Lim, Sung Jin Park
  • Apparatus and method for scheduling users in a mobile communication system
    Patent number: 8045924
    Abstract: An apparatus and method for scheduling users in a mobile communication system are provided, in which a Base Station (BS) calculates scheduling utility values of each Mobile Station (MS) for a plurality of cases of interference from neighbor BSs, forms a candidate MS list by selecting a predetermined number of MSs in a descending order of utility value for each of the cases of interference from the neighbor BSs, transmits the candidate MS list to the neighbor BSs, receives candidate MS lists from the neighbor BSs, calculates the channel transmission rates of candidate MSs included in the candidate MS lists, and selects an MS to be serviced according to the channel transmission rates.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: October 25, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jeong-Woo Cho, Yong Chang
  • Handoff method between heterogeneous networks and system thereof
    Patent number: 8036175
    Abstract: A handoff method between a source network to which a terminal is connected in order of a Base Station (BS) and an Access Service Network (ASN), and a target network to which the terminal is connected in order of a Packet Data Service Node (PDSN), a Packet Control Function (PCF) and an Access Network (AN). The terminal sends a handoff request message with AN information of the target network to the ASN via the BS. The ASN forwards the handoff request message to the PCF via the PDSN using the AN information. Upon receipt of the handoff request message, the PCF sends a request for session information to the ASN via the PDSN. The PDSN sends a request for context information to the ASN. Upon receipt of the session information request and the context information request, the ASN transfers the context information to the PDSN and transfers the session information to the AN via the PDSN and the PCF.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: October 11, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Kyung-Joo Suh, Beom-Sik Bae, Dae-Gyun Kim, Jung-Soo Jung, Veronica Kondratieva, Yong Chang, Nae-Hyun Lim, Jung-Shin Park, Dae-Woo Lee, Jun-Hwan Oh
  • Phase change RAM device and method for fabricating the same
    Patent number: 8026125
    Abstract: Disclosed are a phase change RAM device and a method for fabricating a phase change RAM device, which can efficiently lower intensity of current required for changing a phase of a phase change layer. The method includes the steps of providing a semiconductor substrate formed with an insulating interlayer including a tungsten plug, forming a first oxide layer on the semiconductor substrate, forming a pad-type bottom electrode, which makes contact with the tungsten plug, in the first oxide layer, forming a second oxide layer on the first oxide layer including the bottom electrode, and forming a porous polystyrene pattern on the second oxide layer such that a predetermined portion of the second oxide layer corresponding to a center portion of the bottom electrode is covered with the porous polystyrene pattern.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: September 27, 2011
    Assignee: Hynix Semiconductor Inc.
    Inventors: Heon Yong Chang, Suk Kyoung Hong, Hae Chan Park
  • Phase change memory device having a bent heater and method for manufacturing the same
    Patent number: 8013319
    Abstract: A phase change memory device includes heaters which are formed in their respective memory cells and vertically positioned stack patterns having phase change layers and top electrodes which are formed to come into contact with the heaters. The heaters have horizontal cross-sectional bent shapes which can have any number of shapes such as a shape similar to that of a boomerang. The horizontal cross-sectional bent shapes of the heaters are for minimizing the contact area between the heaters and the phase change layer so that programming currents can be reduced or minimized.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: September 6, 2011
    Assignee: Hynix Semiconductor Inc.
    Inventor: Heon Yong Chang
  • Modeling the transient behavior of BHA/drill string while drilling
    Patent number: 8014987
    Abstract: A method, system and computer program product for performing a drilling operation for an oil field, the oil field having a subterranean formation with geological structures and reservoirs therein. The method involves creating a finite-difference model to simulate behavior of a drilling assembly used to drill a wellbore in the drilling operation, performing a simulation of the drilling operation using the finite-difference model, analyzing a result of the simulation, and selectively modifying the drilling operation based on the analysis.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: September 6, 2011
    Assignee: Schlumberger Technology Corp.
    Inventors: Jahir Pabon, Nathan Wicks, Yong Chang, Clinton Chapman, Vivek Singh
  • Apparatus and method for performing HARQ transmission in a wireless communication system
    Patent number: 8001440
    Abstract: An apparatus and method for optimizing a data rate in a wireless communication system supporting Hybrid Automatic Repeat reQuest (HARQ) are provided. The method includes estimating Channel State Information (CSI) of a signal to be transmitted, by using other CSIs received in a previous cycle; determining an instantaneous data rate, at which the CSI is transmitted with an optimal data rate, and the amount of redundancy information to be retransmitted; and retransmitting the redundancy information of the signal according to the amount of redundancy information and the instantaneous data rate, if a receiving end requests signal retransmission. Accordingly, the packet can be transmitted with the optimal data rate.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: August 16, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jeong-Woo Cho, Yu-Chul Kim, Yong Chang, Jae-Hong Chon
  • Polysilazane, method of synthesizing polysilazane, composition for manufacturing semiconductor device, and method of manufacturing semiconductor device using the composition
    Patent number: 7989257
    Abstract: Disclosed are polysilazane, a method of synthesizing the polysilazane, a composition for manufacturing a semiconductor device, and a method of manufacturing a semiconductor device using the composition. The polysilazane is synthesized through a reaction, under a catalyst, between dichlorosilane, trichlorosilane, and ammonia added in a reaction solvent as a reactant. In this instance, a polystyrene conversion weight average molecular weight of the polysilazane is about 2,000 to 30,000.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: August 2, 2011
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Joo Hyeon Park, Yong Chang
  • SYSTEM AND METHOD FOR FAST NETWORK REENTRY IN A BROADBAND WIRELESS ACCESS COMMUNICATION SYSTEM
    Publication number: 20110176514
    Abstract: A system and method for fast network re-entry in a broadband wireless access communication system. A mobile station transmits a first message requiring fast network re-entry to a base station and performs the fast network re-entry together with the base station when receiving a second message approving the fast network re-entry from the base station. The base station receives the first message, authenticates the first message using final session information of the mobile station that is previously stored in the base station, transmits the second message to the mobile station when succeeding in authentication of the first message, and performs the fast network re-entry together with the mobile station.
    Type: Application
    Filed: March 29, 2011
    Publication date: July 21, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Seung-Il YOON, Tae-Ho Kim, Jun-Hyuk Song, Hong-Sung Chang, Tae-Won Kim, Yong Chang
  • Apparatus and method for supporting multicast/broadcast service in broadband wireless access system
    Patent number: 7978650
    Abstract: An apparatus and a method for processing media data so that an MBS is supported in a BWA communication system. A traffic processing method supports an MBS in a broadband wireless access communication system having a number of base stations and at least one contents server for transmitting various media traffics to the base stations. The method includes reserving a resource for MBS burst assignment with regard to the base stations; requesting the contents server to provide a traffic to be transmitted to the base stations when the resource has been successfully reserved; shaping a media traffic transmitted by the contents server; and transmitting the media traffic to the base stations.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: July 12, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Geun-Hwi Lim, Jun-Hyung Kim, Joon-Ho Park, Yong Chang
  • METHOD AND APPARATUS FOR PROVIDING STANDBY POWER FOR VISUAL DISPLAY DEVICE
    Publication number: 20110163602
    Abstract: Provided are an apparatus and method thereof for providing standby power to a visual display, the apparatus including: a light collection unit which is operable to receive light and output a charging current; a battery which is operable to receive the charging current and providing the standby power to the visual display; and a controller which determines whether the battery has a voltage below a predetermined value, wherein if the voltage is below the predetermined value, the controller controls the battery to receive the charging current from the light collection unit, and wherein if the voltage is not below the predetermined value, the controller controls the battery to provide the standby power to the visual display.
    Type: Application
    Filed: February 24, 2010
    Publication date: July 7, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-yong Joo, Gil-yong Chang, Jin-hyung Lee
  • PHASE CHANGE MEMORY DEVICE CAPABLE OF INCREASING SENSING MARGIN AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20110165752
    Abstract: A phase change memory device capable of increasing a sensing margin and a method for manufacturing the same. The phase change memory device includes a semiconductor substrate formed with a device isolation structure which defines active regions; first conductivity type impurity regions formed in surfaces of the active regions and having the shape of a line; a second conductivity type well formed in the semiconductor substrate at a position lower than the device isolation structure; a second conductivity type ion-implantation layer formed in the semiconductor substrate at a boundary between a lower end of the device isolation structure and the semiconductor substrate; a plurality of vertical PN diodes formed on the first conductivity type impurity regions; and phase change memory cells formed on the vertical PN diodes.
    Type: Application
    Filed: March 14, 2011
    Publication date: July 7, 2011
    Applicant: HYNIX SEMICONDUCTOR INC.
    Inventor: Heon Yong CHANG
  • USER TERMINAL, METHOD FOR PROVIDING POSITION AND METHOD FOR GUIDING ROUTE THEREOF
    Publication number: 20110159858
    Abstract: A user terminal generates position information regarding a position of the user terminal, generates target recognition information for recognizing a target, communicates with a counterpart terminal, and determines whether the target recognition information conforms with first reference information. If so, the user terminal transmits the target recognition information and the position information to the counterpart terminal, and if the information does not conform, the terminal determines whether the target recognition information conforms with second reference information. Accordingly, the user terminal easily provides route guidance to a destination.
    Type: Application
    Filed: November 3, 2010
    Publication date: June 30, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Seung-dong YU, Woo-Yong Chang, Se-Jun Park, Min-jeong Moon, Soo-hong Park, Jin-guk Jeong
  • Method of manufacturing Ni-based superalloy component for gas turbine using one-step process of hot isostatic pressing and heat treatment and component manufactured thereby
    Patent number: 7959748
    Abstract: Disclosed herein are a method of manufacturing a Ni-based superalloy component for a gas turbine using a one-step process of hot isostatic pressing (HIP) and heat treatment, and a component manufactured by the method. In the method, an HIP process and a heat treatment process, which have been performed to manufacture or repair a Ni-based superalloy component for a gas turbine, are performed as a one-step process using an HIP apparatus. Thus, component defects, such as micropores and microcracks, which are generated when casting, welding, or brazing the Ni-based superalloy component for a gas turbine used for a combined cycle thermal power plant or airplane, can be cured using an HIP apparatus at high temperature and high pressure and, at the same time, the physical properties of the Ni-based superalloy component can be optimized using the heat treatment process.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 14, 2011
    Assignee: Korea Electric Power Corporation
    Inventors: Min-Tae Kim, Sung-Yong Chang, Jong-Bum Won, Won-Young Oh
  • DISPLAY DEVICE AND DRIVING METHOD THEREOF
    Publication number: 20110134155
    Abstract: A display device and a driving method are provided. The display device includes: a display panel which displays an image; at least one light emitting diode (LED) which emits light to the display panel; a driver which supplies an operating voltage to the LED and drives the LED; a feedback unit which detects a level of a voltage drop of the LED and outputs a detection signal corresponding to the detected level of the voltage drop; and a first controller which controls a level of the operating voltage supplied to the LED based on the operating voltage supplied to the LED and the detection signal output by the feedback unit.
    Type: Application
    Filed: November 18, 2010
    Publication date: June 9, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Won-myung WOO, Jin-hyung LEE, Gil-yong CHANG
  • PHASE CHANGE MEMORY DEVICE IN WHICH A PHASE CHANGE LAYER IS STABLY FORMED AND PREVENTED FROM LIFTING AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20110136316
    Abstract: A phase change memory device includes a semiconductor substrate having a plurality of phase change cell regions; a lower electrode formed in each of the phase change cell regions on the semiconductor substrate; an insulation layer formed on the semiconductor substrate to cover the lower electrode and defined with a contact hole which exposes the lower electrode; a heater formed in the contact hole; a conductive pattern formed on the insulation layer to be spaced apart from the heater; a phase change layer formed on the heater, the conductive pattern, and portions of the insulation layer between the heater and the conductive pattern; and an upper electrode formed on the phase change layer.
    Type: Application
    Filed: February 14, 2011
    Publication date: June 9, 2011
    Applicant: HYNIX SEMICONDUCTOR INC.
    Inventor: Heon Yong CHANG
  • METHOD AND APPARATUS FOR SWITCHING MODES
    Publication number: 20110117902
    Abstract: A method of switching operation modes in a mobile device is provided. The method includes receiving current location information; determining an on-the-map location corresponding to the current location information; extracting a location property of the determined on-the-map location; and setting an operation mode of the mobile device based on the extracted location property.
    Type: Application
    Filed: November 15, 2010
    Publication date: May 19, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Woo-yong CHANG, Sun-ae Kim, Hyung-rae Cho