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September 2004

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TechNet E-Mail Forum <[log in to unmask]>, Tony Steinke <[log in to unmask]>
Date:
Tue, 28 Sep 2004 12:09:40 -0600
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TechNet E-Mail Forum <[log in to unmask]>, Bill Coleman <[log in to unmask]>
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Bill Coleman <[log in to unmask]>
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Tony

IPC 7525 suggest 2 mil reduction of the stencil apertures from the pads for the PQFP 128's 12 x 63 down to 10 x 61.  For a 6 mil stencil this gives an Area Ratio of .71 which should give good print results.

Regards,

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Tony Steinke
Sent: Tuesday, September 28, 2004 10:51 AM
To: [log in to unmask]
Subject: [TN] stencil thickness


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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