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  1. #1
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    Footprint for WLCSP package

    Hi all,
    I want to know the size of micro via for .265mm pad and .4mm pitch WLCSP package.
    For the same i want to know whether via on SMD pad is possible if so what will be the dia of that micro via.

    Regards,
    Arunmaran

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  2. #2
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    Re: Footprint for WLCSP package

    Hi,

    Best is to go to the chip manufacturer's homepage ( if not in the datasheet) and find it's pcb layout recommendations.
    Or go for IEC standards.

    Klaus



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  3. #3
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    Re: Footprint for WLCSP package

    IEC standards!!!!
    The footprint standard for surface mount devices is IPC-7351 if you are serious about PCB design I would recommend getting to know this standard.

    As to microvias, generally based on a 0.1mm pad with a 0.3mm target area...in your case and mine in the past I have done a micro via with a land the same size as the width of the pad for the device and talked very nicely to my PCB manufacturer, it is doable.



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