0.50 mm pitch QFPs at 2 oz copper thickness

Anonymous_Ricky · Mar 11, 2013

Dear All,

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

BR,

Ricky

marce · Mar 11, 2013

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.

Anonymous_Ricky · Mar 12, 2013

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

sivamani · Mar 12, 2013

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

marce · Mar 12, 2013

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.

0.50 mm pitch QFPs at 2 oz copper thickness

Anonymous_Ricky

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marce

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Anonymous_Ricky

Anonymous_Ricky

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sivamani

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marce

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0.50 mm pitch QFPs at 2 oz copper thickness

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