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    0.50 mm pitch QFPs at 2 oz copper thickness

    Dear All,

    What could be the issues in fabrication of PCBs with <=0.50mm pitch components and 2 Oz copper thickness.

    BR,

    Ricky

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    Re: 0.50 mm pitch QFPs at 2 oz copper thickness

    Start of with a thinner copper for base, say 1oz and have it plated up to achieve 2oz, thats what I have done and seems to be pretty standard practice.


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    Re: 0.50 mm pitch QFPs at 2 oz copper thickness

    Hi Marce,

    Thanks for your reply
    My other concern is, could there be any chance of pads getting shorted due to 0.50 mm fine pitch and 2Oz copper thickness.

    Ricky



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    Re: 0.50 mm pitch QFPs at 2 oz copper thickness

    Yes there will be accept ratio issues and also it depends on the manufacturing capabilities..



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    Re: 0.50 mm pitch QFPs at 2 oz copper thickness

    No thats why you have them made out of lighter copper and plated up to 2oz, you also get better pad definition with less etch back.


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