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  • 1
    Electronic Resource
    Electronic Resource
    Popcorning in Fully Populated and Perimeter Plastic Ball Grid Array Packages* (1996)
    Bradford : Emerald
    Soldering & surface mount technology 8 (1996), S. 46-50 
    Details
    ISSN: 0954-0911
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Two types of Plastic ball Grid array packages, a225-lead full matrix array and a 256-lead perimeter array, were subjected to 168 hours of moisturepreconditioning at 85°C and 30% relative humidity followed by simulated infra-red reflow attemperature ramp rates of 1°C/s and 0.67°C/s. The packages were subsequently examined fordelamination and cracking using scanning acoustic microscopy and environmental scanning electronmicroscopy. At the higher ramp rate, delamination and cracking were observed in both packagetypes, originating in the die attach and propagating along the weakest interfaces. At the lower ramprate, a small amount of delamination was observed. This suggests that there is a critical ramp ratebelow which popcorn cracking does not occur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/09540919610777591
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structural study of Tm on Mo(110)
    Amsterdam : Elsevier
    Surface Science 269-270 (1992), S. 700-706 
    Details
    ISSN: 0039-6028
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0039-6028(92)91336-A
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation and thermoanalytic studies of yttrium poly(acrylate) (1988)
    Springer
    Journal of thermal analysis and calorimetry 34 (1988), S. 1441-1448 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein neues Verfahren zur Herstellung von Keramikpulvern wurde untersucht. Das Verfahren beinhaltet die Chelatisierung eines in Lösung befindlichen Metallions mittels einer polymeren organischen Säure. Unter Zuhilfenahme von FTIR, TG, DTG und DTA wurde der Vorgang der organometallischen Komplexbildung und der Zersetzung zu Metalloxid beschrieben. Der Einfluss der Packungsdichte auf die DTA wird ebenfalls beschrieben.
    Abstract: РЕжУМЕ ИжУЧЕН НОВыИ пРОцЕсс пОлУЧЕНИь УлУЧшЕННы х кЕРАМИЧЕскИх пОРОшк ОВ, кОтОРыИ ВклУЧАЕт хЕлАтИРОВА НИЕ В РАстВОРЕ ИОНА МЕ тАллА кАкИМ-лИБО ОРгАНИЧЕс кИМ кИслОтНыМ пОлИМЕРОМ. ИспОльжУь ФУРьЕ-Ик спЕктРОскОп ИУ, тг, Дтг И ДтА, ИжУЧЕН пРОцЕсс ОБ РАжОВАНИь ОРгАНО-МЕтАллИЧЕскО гО кОМплЕксА И РАжлОж ЕНИЕ ЕгО ДО ОксИДА МЕтАллА. ОБсУж ДЕНО тАкжЕ ВлИьНИЕ плОтНОстИ НА БИВкИ НА ДтА ИжМЕРЕНИ ь.
    Notes: Abstract A new process for the production of advanced ceramic powders has been studied. The process involves the chelation of a metal ion in solution by an organic acid polymer. Using FTIR, TG, DTG and DTA, the process for the formation of the organo-metallic complex and the decomposition to the metal oxide is reported. Effects of packing density on DTA are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01914368
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  • 4
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    Numerical Representations of Marine Ice‐Nucleating Particles in Remote Marine Environments Evaluated Against Observations (2019)
    Wiley
    Details
    Publication Date: 2019
    Description: Abstract The abundance and sources of ice‐nucleating particles, particles required for heterogeneous ice nucleation, are long‐standing sources of uncertainty in quantifying aerosol‐cloud interactions. In this study, we demonstrate near closure between immersion freezing ice‐nucleating particle number concentration (nINPs) observations and nINPs calculated from simulated sea spray aerosol and dust. The Community Atmospheric Model with constrained meteorology was used to simulate aerosol concentrations at the Mace Head Research Station (North Atlantic) and over the Southern Ocean to the south of Tasmania (Clouds, Aerosols, Precipitation, Radiation, and atmospherIc Composition Over the southeRN ocean campaign). Model‐predicted nINPs were within a factor of 10 of nINPs observed with an off‐line ice spectrometer at Mace Head Research Station and Clouds, Aerosols, Precipitation, Radiation, and atmospherIc Composition Over the southeRN ocean campaign, for 93% and 69% of observations, respectively. Simulated vertical profiles of nINPs reveal that transported dust may be critical to nINPs in remote regions and that sea spray aerosol may be the dominate contributor to primary ice nucleation in Southern Ocean low‐level mixed‐phase clouds.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 5
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    Structural study of Tm on Mo(110) (1992)
    Elsevier
    Details
    Publication Date: 1992-05-01
    Print ISSN: 0039-6028
    Electronic ISSN: 1879-2758
    Topics: Physics
    Published by Elsevier
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