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  • 1
    Electronic Resource
    Electronic Resource
    Bradford : Emerald
    Assembly automation 17 (1997), S. 66-74 
    ISSN: 0144-5154
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Presents some experimental and theoretical results from research exploring the design rules and relevant process parameters in the assembly of electronic components using anisotropic conductive adhesive materials. The experimental configurations studies have geometries representative of flip-chip and micro ball grid array chip scale packaging. Evaluates a range of materials combinations, including (random filled) adhesive materials based on both thermoplastic and thermo-setting resin systems, combined with both glass reinforced polymer printed circuit board and silver palladium thick film on ceramic substrate materials. Also presents a summary of assembly experiments which have been conducted using a specially developed instrumented assembly system. This test rig allows the measurement of the process temperatures and pressures and their relationship with the consequent bondline thickness reduction and conductivity development. Finally summarizes the capabilities of models which have been developed of the assembly process and of the final joint properties.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Bradford : Emerald
    Circuit world 25 (1999), S. 55-58 
    ISSN: 0305-6120
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: This paper examines the make-up of the subcontract printed circuit board industry in the UK and identifies the geographical location of manufacturing sites together with the number of employees at these sites. It describes both the subcontract board-producing and assembly sectors. The maps show the position and size of the sites, and these together with a histogram showing the frequency of ranges of employee numbers, provide an understanding of the structure of the industry. Higher density areas which have a greater incidence of PCB manufacturing activity are identified and compared. It is also shown that there is little consistent relationship between the positions of the major system providers and the PCB subcontract industry sites. Concern is expressed about the ability of the many smaller companies to compete in the supply of emerging assembly and substrate technologies.
    Type of Medium: Electronic Resource
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