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November 2010 cover

FEATURES

    PCB WEST RECAP
    Hot in the Valley
    Something isn’t getting through, as signal integrity classes were packed even though most designers say they don’t perform the critical analysis.
    by Mike Buetow

    POPCORN PREVENTION
    MSD Protection Steps Per J-STD-033B.1
    ICs can act like a sponge. If they have semi-permeable membranes, moisture from the ambient air can get into those devices. When they get rapidly heated during reflow or rework, the result is rapid outgassing. In some cases, this excessive outgassing causes popcorning, which can damage the internal structures of a component. This how-to helps prevent and rid moisture from components.
    by Don Shell

     

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