Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

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Coplanarity specs

albertoh

#26160

Coplanarity specs | 24 October, 2003

I need some information about coplanarity specs for QFP's. I try to setup coplanarity inspection on my QP242 but i'm not sure about what value i need on each parameter in order to setup my diferents parts data for this option. Thanks in advance.

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#26161

Coplanarity specs | 24 October, 2003

We usually matched the value with the thickness of the paste or stencil. If the lead doesn�t dip into the paste it will not be soldered.

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Arturo

#26164

Coplanarity specs | 24 October, 2003

Refer to your components' drawings to check for this data.

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Gabriele

#26171

Coplanarity specs | 25 October, 2003

JEDEC Standards allows max 4 mils lead coplanarity

Gabe

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