Electronics Forum | Tue Mar 21 02:15:26 EST 2006 | pavel_murtishev
Good morning Dave, Here are some of my assumptions. Please correct me if I am wrong. 1. Mask opening. Due to mask to PCB misregistration mask is not always centered relative to pad center how is should be. Sometimes edge of the mask matches with ed
Electronics Forum | Mon May 24 13:33:46 EDT 1999 | Dave F
| We are running a number of boards with 8-10 25 mil PQFPs on board. Our process is mature with at least 3 years experiance and statistically few opens on the QFPs. Our beloved purchasing department has chased the almighty $ and changed FAB vendor
Electronics Forum | Fri Nov 08 14:48:58 EST 2002 | davef
Yours is (12 thou x12 thou)/(2x(12 thou +12 thou)x5 thou) = 0.60 * Aspect=W/T for electroformed stencils SB GT 1.1 => Yours is 12 thou/5 thou = 2.40 So, we kind of think of what you�re trying do as maybe printing a 16 pitch QFP, which gives you simi
Electronics Forum | Thu Jun 29 09:29:46 EDT 2000 | JAX
sree, You might want to check the archives. If not, I found this just a few questions below yours!! [Back to thread listing at top] Posted by Igmar on June 22, 2000 at 10:27:26 AM EST Can someone please help with the aperture size on a Micro BGA st
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