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  • 1
    Electronic Resource
    Electronic Resource
    Application of linear elastic fracture mechanics on electric discharge breakdown in interconnects (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 3565-3567 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Analog to the approach used in linear elastic fracture mechanics, the electric discharge breakdown in interconnects is analyzed. The electric field is solved using the conformal mapping technique. The direction of electric field at the upper slit surface is opposite to that at the lower surface. Similar to the Griffith fracture criterion, we propose that the critical power release rate for crack propagation is equal to the electric breakdown power required to create a unit area of microcrack. It is found that the power release rate increases with decreasing linewidth of interconnect. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.122808
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  • 2
    Electronic Resource
    Electronic Resource
    Acetone transport in poly(ethylene terephthalate) (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 6680-6683 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Organic solvents like acetone can penetrate into poly(ethylene terephthalate) (PET). The model of case I (Fickian) and case II (swelling) is employed to study the phenomenon of mass transport. This model is successful in explaining the behavior of mass transport in an amorphous polymer, for example, poly(methyl methacrylate) (PMMA). The characteristic parameters, diffusivity D and velocity v, can be obtained from the analysis of experimental data. The mass transport in PET is different from that in PMMA. It is accompanied by a large-scale structural rearrangement, which leads to induced crystallization of the original amorphous state. This is the so-called "solvent-induced crystallization." Acetone-induced crystallization was confirmed by x-ray diffraction. The differential scanning calorimetry thermograms of acetone-treated PET show that the crystallization peak disappears and the glass transition temperature decreases. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365208
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  • 3
    Electronic Resource
    Electronic Resource
    Interaction of an edge dislocation with a wedge crack (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 4873-4880 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The elastic interaction of an edge dislocation with a wedge crack is investigated using Muskhelishvili's complex potential treatment of elasticity. The stress intensity factors induced by the dislocation, the strain energy, and the image force acting on the dislocation are formulated, calculated, and plotted. Especially, the influence of wedge angle on the shielding effects and on image forces is investigated. The results show that the radial component of the image force is inversely proportional to the distance from the crack tip to the dislocation and the tangential image force increases with increasing wedge angle as the dislocation position is kept unchanged. When the slip plane passes the crack tip, whether the edge dislocation shields or antishields the crack tip depends on its Burgers vector. In this case, the slip plane of the edge dislocation of Burgers vector b1+ib2=beiθmax inclined at an angle θmax with respect to the positive real axis corresponding to the maximum mode I crack shielding increases slightly to a maximum and then decreases with increasing wedge angle. Regardless of wedge angle, the maximum mode II shielding (or anti-shielding) occurs when the dislocation is located at the positive real axis. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359775
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  • 4
    Electronic Resource
    Electronic Resource
    Ethyl-acetate transport in poly(ethylene terephthalate) (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 1148-1152 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of annealing atmosphere on the transport of ethyl-acetate in poly(ethylene terephthalate) (PET) and related phenomena were investigated. Based on Harmon's model for case I (Fickian), case II (swelling) and anomalous transport, the data of mass uptake were analyzed. Pure case I or case II behavior did not appear in the PET–ethyl-acetate system and is affected by the atmosphere of annealing. The variations of conformations was studied by the Fourier-transform infrared. The mass transport in PET is accompanied by a large-scale structural rearrangement, which leads to the induced crystallization of the original amorphous state. The preferred growth plane varies under the influence of different solvents. Solvent-induced crystallization was confirmed by x-ray diffraction, differential scanning calorimeter, and density measurement. The different behaviors of sorption between the solvent-treated PET crystallites and thermally treated PET can be explained in terms of the results from density measurement. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.369240
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  • 5
    Electronic Resource
    Electronic Resource
    Acetone transport in poly(ethylene terephthalate) and related phenomena (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 36 (1998), S. 163-169 
    Details
    ISSN: 0887-6266
    Keywords: acetone ; poly(ethylene terephthalate) ; mass transport ; solvent-induced crystallites ; Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The acetone transport in poly(ethylene terephthalate) (PET) and related phenomena was investigated. Based on Harmon's model for Case I, Case II, and the anomalous transport, we analyzed the data of mass uptake. The diffusivity for Case I and the velocity for Case II satisfied the Arrhenius plot. It was found that the solvent moves from outer surfaces to the center according to Case I kinetics, and there is movement in the opposite direction according to Case II kinetics during the mass uptake. This result indicated that pure Case II behavior did not appear in the PET-acetone system. The saturated amount of acetone in PET satisfied the van't Hoff plot. X-ray diffraction pattern and DSC curve showed solvent-induced crystallites and thermal crystallites. The results of density measurement explained the difference of the sorption kinetics between the acetone-treated PET crystallites and thermally treated PET. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 163-169, 1998
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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