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Sökning: swepub > Liu Johan 1960

  • Resultat 351-360 av 547
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  • Peng, Wangli, et al. (författare)
  • Mechanical properties of a novel Nano-Thermal Interface Material
  • 2013
  • Ingår i: Proceedings of the IEEE Conference on Nanotechnology. - 1944-9399 .- 1944-9380. - 9781479906758 ; , s. 942-945
  • Konferensbidrag (refereegranskat)abstract
    • Continued miniaturization in combination with increased performance in microelectronics has generated an urgent need for improved thermal management techniques in order to maintain reliability in systems and devices. Thermal interface materials play a key role in the development of solutions for thermal management in microelectronics. In this paper, mechanical properties of a nanotechnology enhanced thermal interface material (Nano-TIM) were studied. The material is based on Sn-Ag-Cu based alloy reinforced with nano scale fiber matrix. Tensile tests were used to investigate and compare the elastic modulus at room temperature and mechanical strength between 20 to 100°C. Scanning Electron Microscopy (SEM) analysis techniques were used to investigate the morphology of the fracture section after tensile tests as well as the internal structure of the samples. The results show that the Nano-TIM can have a significantly lower elastic modulus compared to the pure alloy phase of SnAgCu due to its fiber phase. A lower elastic modulus of the solder joint can be important since it will reduce the stress transfer across the interface. This is particular important when the joint substrates have mismatching coefficients of thermal expansion. The findings of this study thus indicate that the Nano-TIM may provide a useful alternative to improve the thermomechanical reliability compared to pure solder joints. © 2013 IEEE.
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356.
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358.
  • Qin, Yiheng, 1987, et al. (författare)
  • Organic Thin-Film Transistors with Anodized Gate Dielectric Patterned by Self-Aligned Embossing on Flexible Substrates
  • 2012
  • Ingår i: Advanced Functional Materials. - : Wiley. - 1616-3028 .- 1616-301X. ; 22:6, s. 1209-1214
  • Tidskriftsartikel (refereegranskat)abstract
    • An upscalable, self-aligned patterning technique for manufacturing high- performance, flexible organic thin-film transistors is presented. The structures are self-aligned using a single-step, multi-level hot embossing process. In combination with defect-free anodized aluminum oxide as a gate dielectric, transistors on foil with channel lengths down to 5 mu m are realized with high reproducibility. Resulting on-off ratios of 4 x 106 and mobilities as high as 0.5 cm2 V-1 s-1 are achieved, indicating a stable process with potential to large-area production with even much smaller structures.
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359.
  • Raugi, Fabien, et al. (författare)
  • Flow Behaviour of Anisotropic Conductive Adhesive Film during COG Bonding Process in Flat Panel Display Assembly
  • 2006
  • Ingår i: 1st Electronics Systemintegration Technology Conference; Dresden, Saxony; Germany; 5 September 2006 through 7 September 2006. - 1424405521 ; 2, s. 828-833
  • Konferensbidrag (refereegranskat)abstract
    • Anisotropic conductive adhesives have emerged as an important joining technology in a number of significant application areas, such as fine pitched driver IC for flat panel display assembly and smart cards. In the past research work in this field, it has been shown that the pressure distribution and adhesive compression flow predicted using the Newtonian and non-Newtonian FV models both agree closely with those from the previously developed analytical model. This gives confidence in the FV modelling approach and therefore the results predicted more complex situations which the analytical model cannot address. These results further confirm that a more sophisticated modelling approach is required in order to allow a full understanding about the effects of the assembly process on its final properties when the adhesive flows. An analytical model has been proposed in this paper which takes into account more complex bump geometry and can be used to predict the velocity and pressure drop distribution through the entire chip during the COG bonding process. The analytical solution is followed by the finite element modelling, which agrees well with the analytically predicted solution.
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  • Resultat 351-360 av 547
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Fu, Yifeng, 1984 (95)
Ye, L (70)
Wang, Teng, 1983 (46)
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Ye, Lilei (41)
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Zhang, Yan, 1976 (30)
Zhang, Yan (29)
Wang, Nan, 1988 (29)
Zandén, Carl, 1984 (29)
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Chen, Si, 1981 (26)
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