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September 2004

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Subject:
From:
Phil Bavaro <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Phil Bavaro <[log in to unmask]>
Date:
Tue, 28 Sep 2004 11:07:21 -0700
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0603s and gull wing leaded packages with pads at 12 x 63 does not tell us
enough information to answer your question.

Assuming the pitch for the PQFP is 20 mil, you can use either a 5 or 6 mil
thick stencil, but it is truly predicated on what your cad library shapes
are designed for.

We design all of our component library shapes based on a 5 mil thick
stencil today, but pitches less than 20 may cause us to have to change that
design guideline in the future.







Question?

>What thickness stencil do you recommend on a 6"x8"
>board with mostly 0603's and a couple of PQFP128's.
>The pads on the PQFP are 12 x 63.
>
>TIA
>
>Tony Steinke
>
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