• 제목/요약/키워드: annealing.

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Continuous Variable을 갖는 Mean Field Annealing과 그 응용

  • 이경희;조광수;이원돈
    • ETRI Journal
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    • 제14권3호
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    • pp.67-74
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    • 1992
  • Discrete variable을 갖는 Mean Field Theory(MFT) neural network은 이미 많은 combinatorial optimization 문제에 적용되어져 왔다. 본 논문에서는 이를 확장하여 continuous variable을 갖는 mean field annealing을 제안하고, 이러한 network에서 integral로 표현되는 spin average를 mean field에 기초하여 어렵지 않게 구할 수 있는 one-variable stochastic simulated annealing을 제안하였다. 이런 방법으로 multi-body problem을 single-body problem으로 바꿀 수 있었다. 또한 이 방법을 이용한 응용으로서 통계학에서 잘 알려진 문제중의 하나인 quantification analysis 문제에 적용하여 타당성을 보였다.

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Effective Annealing and Crystallization of Si film for Advanced TFT System

  • Noguchi, Takashi
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.254-257
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    • 2009
  • The crystallization and activated annealing effect of Si films using an excimer laser and a new CW blue laser are described comparing with furnace annealing (SPC) for the application of advanced TFTs and future applications. Currently, pulsed ELA is used extensively as a LTPS process on glass substrates as the efficiency is high in UV region for thin Si film of 40- 60 nm thickness. ELA enables extremely low resistivity for both n- and p-typed Si films. On the other hand, CW BLDA enables the smooth Si surface having arbitral grains from micro-grains to anisotropic huge grain structure only controlling its power density.

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UV Optical Solutions for Thin Film Processing and Annealing Research

  • Delmdahl, Ralph;Shimizu, Hiroshi;Dittmar, Mirko;Fechner, Burkhard
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.246-249
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    • 2009
  • A compact, flexible family of UV laser material processing systems has been developed to drive advancements in both large area processing and annealing of semiconductor surfaces. UV photons can either be applied via demagnifying a mask pattern image or by scanning a homogenized excimer beam across the substrate area. 193nm, 248nm and 308nm wavelength applications are supported.

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NOL 삽입에 따른 NiO/Co/Cu/Co 스핀밸브 박막의 annealing effect (Annealing effect in NiO/Co/Cu/Co spin valve with NOL)

  • 최상대;주호완;이경민;이기암
    • 한국자기학회:학술대회 개요집
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    • 한국자기학회 2002년도 동계연구발표회 논문개요집
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    • pp.162-163
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    • 2002
  • 거대자기저항(GMR) 분야에서 높은 GMR 값을 보유하는 것은 주요 관심사이다. Egelhoff와 연구자들은 산소를 이용하여 스핀밸브 박막의 표면을 산화시켜 유도 전자들의 Specular 산란 효과를 보고하였으며, 강자성층과 산화층 사이의 계면에서 specular 반사가 이루어져 GMR의 향상을 가져온 것으로 보고 있다[1,2]. 또한 annealing에 따른 자기적 특성의 향상과에 관한 논문도 보고되어진 바 있다[4]. (중략)

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재생셀룰로오스섬유 물성에 대한 응고액과 열처리의 효과 (Effects of Coagulants and Annealing on Properties of Regenerated Cellulose Fibers)

  • Hong, Young Keun
    • 한국염색가공학회지
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    • 제7권4호
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    • pp.54-60
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    • 1995
  • Cellulose(cell)/dimethylacetamide(DMAc)/lithium chloride(LiCl) solutions were prepared and spun to fibers in coagulants. Then, obtained fibers were annealed in appropriate chemicals. The fibers from cell/DMAc/LiCl showed cell III morophology prior to annealing without differenciating the kind of coagulants. Morphology of crystallite, however, was affected by annealing. Annealed fibers at 17$0^{\circ}C$ showed cell IV morphology and had better mechanical properties than others.

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T-칼라링 문제를 위한 탐색공간 스무딩 Simulated Annealing 방법 (A Simulated Annealing Method with Search Space Smoothing for T-Coloring Problem)

  • 이정은;한치근
    • 대한산업공학회지
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    • 제25권2호
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    • pp.226-232
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    • 1999
  • Graph Coloring Problem(GCP) is a problem of assigning different colors to nodes which are connected by an edge. An extended form of GCP is TCP (T-coloring problem) and, in TCP, edge weights are added to GCP and it is possible to extend GCP's applications. To solve TCP, in this paper, we propose an improved Simulated Annealing(SA) method with search space smoothing. It has been observed that the improved SA method obtains better results than SA does.

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강관 유도 광휘 열처리 시스템 개발에 관한 연구 (A Study on the Development of Induction Bright Annealing System for Stainless Steel Welded Pipe & Tubes)

  • 신완호;배종수;이주석
    • 연구논문집
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    • 통권22호
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    • pp.97-105
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    • 1992
  • This study aimed to develop the heat treating equipment which could produce austenitic stainless steel welded pipes & tubes maintaining its peculiar brightness even after heat treatment. The results of this study are as follows:- Development of 8.5kHz, 150kw bright annealing system was achieved. - Bright annealing of austenitic stainless steel welded pipes & tubes was performed by the developed pilot-system through this study and heat-treatment effects were quite successful in viewpoint of surface brightness, hardness distribution, microstructure, removal of residual stress, strength and corrosion resistance.

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PLD를 이용한 ZnO 박막의 후열처리에 관한 연구 (Effects of post-annealing treatment of ZnO Thin Films by Pulsed Laser Deposition)

  • 김재홍;이천
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 하계학술대회 논문집 C
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    • pp.1627-1630
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    • 2004
  • ZnO thin films on (001) sapphire substrates have been deposited by pulsed laser deposition(PLD) technique using an Nd:YAG laser with a wavelength of 266nm. Before post-annealing treatment in the oxygen ambient, the experiment of the deposition of ZnO thin films has been performed for substrate temperatures in the range of $300{\sim}450^{\circ}C$ and flow rate of 100${\sim}$700 seem. In order to investigate the effect of post-annealing treatment of ZnO thin films, films have been annealed at various temperatures after deposition. After post-annealing treatment in the oxygen ambient, the structural properties of ZnO thin films were characterized by X-ray diffraction(XRD) and the optical properties of the ZnO were characterized by photoluminescence(PL).

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AZ31 판재에서 소둔처리가 상온성형성에 미치는 영향 (Effect of Annealing Treatment on Cold Formability of AZ31 Sheets)

  • 황범규;이영선;문영훈;김대용
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2009년도 추계학술대회 논문집
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    • pp.395-398
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    • 2009
  • The purpose of this paper is to investigate the effect of annealing treatment on cold formability of magnesium alloy sheet AZ31. The AZ31 sheets with three different thickness (1.0t, 1.6t, 2.0t) were annealed at three different temperatures ($345^{\circ}C$, $400^{\circ}C$ and $450^{\circ}C$). The mechanical properties and microstructure evolution of the annealed AZ31 were examined as well as limit dome height (LDH) and compared with those of as received one. The cold formability was enhanced but the strength was deteriorated by the annealing treatment.

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비정질 실리콘의 재결정화에 따른 표면기복의 변화에 관한 연구 (A Study on the Variation of Surface Roughness of a-Si According to Recrystallization)

  • 박재홍;정종원;김철주
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1995년도 하계학술대회 논문집 C
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    • pp.1181-1183
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    • 1995
  • In this study, we observed the surface morphology of amorphous silicon annealed at $700{\sim}1000^{\circ}C$ for recrystallization. In case of $700{\sim}800^{\circ}C$ annealing, deposited amorphous silicon have the saturated XRD intensity and decreased surface roughness after annealing for 3 hours. It is thought that surface roughness of amorphous silicon increases because of contributions caused by atomic rearrangement of surface, for instance, surface stress etc., in the course of recrystallinzation and decrease because of the relaxation of stress by annealing in reaching completion of recrystallization. In case of $1000^{\circ}C$ annealing, the effect of grain size on deposited silicon is more effective than that of surface roughness. These results show that small grain silicon has the stronger dependence on surface roughness than large grain one.

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