• Title/Summary/Keyword: Main Gate

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Novel offset gated poly-Si TFTs with folating sub-gate (부동 게이트를 가진 새로운 구조의 오프셋 다결정 실리콘 박막 트랜지스터)

  • 박철민;민병혁;한민구
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.33A no.7
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    • pp.127-133
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    • 1996
  • In this paper, we propose a new fabrication method for poly-Si TFTs with a self-aligned offset gated structure by employing a photoresist reflow process. Compared with the conventional poly-Si TFTs, the device is consist of two gate electrodes, of which one is the entitled main gate where the gate bias is employed and the other is the entitled subgate which is separate form both sides of the main gate. The poly-Si channel layer below the offset oxide is protected form the injected ion impurities for the source/drain implantation and acts as an offset region of the proposed device. The key feature of oru new device is the offset region due to the offset oxide. our experimental reuslts show that the offset region, due to the photoresist reflow process, has been sucessfully obtained in order to fabricate the offset gated poly-Si TFTs. The maximum ON/OFF ratio occurs at the L$_{off}$ of 1.1${\mu}$m and exceeds 1X10$^{6}$.

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The Spatial Organization of Gyeongbok Palace and The Six Ministries A venue in the Early Joseon Dynasty - The Ceremony at the Main Gate and its Meaning - (조선초기 경복궁의 공간구조성과 6조대로 - 광화문 앞의 행사와 그 의미 -)

  • Kim, Dong-Uk
    • Journal of architectural history
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    • v.17 no.4
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    • pp.25-42
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    • 2008
  • The Gyeongbok Palace was completed during the reign of King Taejo and King Sejong in the early Joseon Dynasty. The most remarkable spacious feature of the palace is that it has an inner palace wall without an outer palace wall. The absence of the outer palace wall had its origin in the palace of the late Goryeo Dynasty which did not provide the outer palace wall. Gwanghwamoon was the main gate of the palace, and the office buildings of the Six Ministries were arranged on the right side in front of the main gate. A wide road called Six Ministries Avenue was made between the builidings. The avenue was completed during the reign of the third king of Joseon, Taejong, and it was assumed that this arrangement was influenced by the government office arrangements of Nanjing, the early capital city of the Ming Dynasty. Gwanghwamoon held national rituals as well as the civic and military state examinations nations in front of the gate. The avenue was decorated with flowers and silks when kings and the royal families, or Chinese envoys enter the gate, and the civilians watched the parade, Because there was no outer palace wall, all the events held at Gwanghwamoon and the Six Ministries Avenue ware opened to the public, it was the unique feature of Gyeongbok Palace that the palaces of Goryeo dynasty and China did not have.

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Gate array(custom IC) of high speed processing circuit for sequence instruction (시퀀스 명령 고속처리 회로의 gate array)

  • Yoo, J. H.;Yang, O.;Shin, Y. M.;Ann, J. B.;Lee, J. D.
    • 제어로봇시스템학회:학술대회논문집
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    • 1988.10a
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    • pp.414-417
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    • 1988
  • Recently PLC pursues faster scanning time, circuit confidence, reliability improvement, and smaller size. To obtain above all merit, custom IC(Gate Array) is developed. Custom IC includes 5 main blocks and 2 auxiliary blocks. The 5 main blocks process faster sequential instruction execution by only logic gate using hexa instruction code system. And the 2 auxiliary blocks generate baud rate clock (153.6 KHz, 76.8KHz) to communicate between PLC and computer or programmers.

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A Research on the Reconstruction Project for the Main Gate Area of the U University Campus (대학 정문 진입부 재구성을 통한 캠퍼스 환경개선에 관한 연구 -경남 소재 U대학의 주차 및 복합시설 구성을 중심으로-)

  • Lee, Kwang-Hee
    • The Journal of Sustainable Design and Educational Environment Research
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    • v.10 no.1
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    • pp.1-9
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    • 2011
  • In order to solve the current shortage of parking spaces, and redesign the main gate area of the U University, the research investigated some cases of other schools located in Seoul which actively constructed multi-purpose building structures. Those schools are considered to be good samples showing their efforts to fulfill the needs of more parking spaces in their campuses, and to cover with the growing needs of multi-functioned facilities accommodating services of academic affairs, reading room spaces, and amenities. With the investigation, the research finded out the current trends of campus developments from the sample schools, such as underground parking facilities connected with multi-purpose buildings along the main arteries of campuses. Following the trends the research thoroughly examined the present conditions of our school and tried to make some possible alternatives for the facilities. Under the conditions, the research suggested 1)to construct underground parking lots accepting around 1,000 cars under the ivory tower square located in front of University Administration Building, 2)to develop a big-scaled open square at the university main gate, and 3)to build a multi-purpose structure along the main street of the campus, which included administration services, studying spaces, and some commercial facilities.

Fluorine Effects on NMOS Characteristics and DRAM Refresh

  • Choi, Deuk-Sung
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.12 no.1
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    • pp.41-45
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    • 2012
  • We observed that in chemical vapor deposition (CVD) tungsten silicide (WSix) poly gate scheme, the gate oxide thickness decreases as gate length is reduced, and it intensifies the roll-off properties of transistor. This is because the fluorine diffuses laterally from WSix to the gate sidewall oxide in addition to its vertical diffusion to the gate oxide during gate re-oxidation process. When the channel length is very small, the gate oxide thickness is further reduced due to a relative increase of the lateral diffusion than the vertical diffusion. In DRAM cells where the channel length is extremely small, we found the thinned gate oxide is a main cause of poor retention time.

Multi Function IGBT Gate Driver Including Arm Short Protection (Arm Short 보호 기능을 포함한 다기능 IGBT GATE DRIVER)

  • 이경복;조국춘;최종묵
    • Proceedings of the KSR Conference
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    • 2000.05a
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    • pp.202-209
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    • 2000
  • This paper introduces the main function and protection method of IGBT gate driver that designed by KOROS. Recently, the applications of insulated gate bipolar transistors(IGBTs) have expanded widely, particularly in the area of railway converters. This driver is suitable for railway traction applications, so they are designed for circumstance of railway vehicle such as vibration. The input control power for this driver is supplied from battery charger of railway. it is no necessary an isolated power supply board or auxiliary power supply, with substantial savings in cost and space in railway applications. This gate driver can be used wide range of input voltage. So, performance of the driver has no relation with the battery voltage(70V∼110V). The protection methods of IGBT gate driver have many kind of ways, but this gate driver it designed to apply to converter for railway system, so this gate driver includes protection for arm short current and low control power voltage, etc. And the process of protection method and protection reference value are optimized by means of sufficient test with our own facilities.

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Analysis of Short Channel Effects Using Analytical Transport Model For Double Gate MOSFET

  • Jung, Hak-Kee
    • Journal of information and communication convergence engineering
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    • v.5 no.1
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    • pp.45-49
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    • 2007
  • The analytical transport model in subthreshold regime for double gate MOSFET has been presented to analyze the short channel effects such as subthreshold swing, threshold voltage roll-off and drain induced barrier lowering. The present approach includes the quantum tunneling of carriers through the source-drain barrier. Poisson equation is used for modeling thermionic emission current, and Wentzel-Kramers-Brillouin approximations are applied for modeling quantum tunneling current. This model has been used to investigate the subthreshold operations of double gate MOSFET having the gate length of the nanometer range with ultra thin gate oxide and channel thickness under sub-20nm. Compared with results of two dimensional numerical simulations, the results in this study show good agreements with those for subthreshold swing and threshold voltage roll-off. Note the short channel effects degrade due to quantum tunneling, especially in the gate length of below 10nm, and DGMOSFETs have to be very strictly designed in the regime of below 10nm gate length since quantum tunneling becomes the main transport mechanism in the subthreshold region.

A Study on the Development of Decision Support System for Intelligent Gate Assignment (지능형 주기장 배정을 위한 의사결정지원시스템 개발에 대한 연구)

  • 이희남;최광억;이창호
    • Proceedings of the Safety Management and Science Conference
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    • 2001.11a
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    • pp.37-42
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    • 2001
  • Utilization rate for the restrictive gate and required time and walking distance to board are to be a measure for the gate management and passenger's convenience estimation. So, the main purpose of the gate management are maximization of utilization rate and increment of airport terminal user's convenience through the efficient gate management. This study intends to maximize the utilization rate on usable gates by concerning about layout, terminal configuration, local passenger of the airport and development of gate assignment algorithm and DSS which maximize the gate utilization and minimize the passenger's walking distance.

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A Study on the Development of Decision Support System for Intelligent Gate Assignment (지능형 주기장 배정을 위한 의사결정지원시스템 개발에 대한 연구)

  • 이희남;김연명;이창호
    • Journal of the Korea Safety Management & Science
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    • v.5 no.1
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    • pp.93-102
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    • 2003
  • Utilization rate for the gate and required time and walking distance to boarding flight are important measures for the gate management and passenger's convenience estimation. So, the main purpose of the gate management are the maximization of utilization rate and improvement of airport terminal user's convenience through the efficient gate management. This study intends to maximize the utilization rate of usable gates by considering layout, terminal configuration, local passenger of the airport and development of gate assignment algorithm and DSS which maximizes the gate utilization and minimizes the passengers' walking distance. And the decision support system can provide an efficient means of airport management of airport using an assignment algorithm.

Optimizing Gate Assignment at Domestic Airport (공항터미널 주기장 배정의 최적화에 대한 연구)

  • 이희남;김연명;이공섭;이창호
    • Journal of the Korea Safety Management & Science
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    • v.4 no.4
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    • pp.129-136
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    • 2002
  • Utilization rate for the restrictive gate and required time and walking distance to board are to be a measure for the gate management and passenger's convenience estimation. So, the main purpose of the gate management are maximization of utilization rate and increment of airport terminal user's convenience through the efficient gate management. This study intends to maximize the utilization rate on usable gates and minimize the passenger's working distance in terminal by concerning about layout, terminal configuration, local passenger of the airport and formulate the gate assignment problem with integer linear programming problem. Then we obtained solution using optimization software LINGO and analyzed that maximize the number of assignment flights and minimize the passenger's walking distance.