Electronics Forum | Fri Apr 12 15:10:00 EDT 2002 | jsherrow
IMHO it's caused by three things: 1) placement 2) placement 3) placement
Electronics Forum | Wed Sep 22 22:56:44 EDT 2004 | davef
Talk to 10 people and you get 10 recommendations for pad layout. So far, here's number 3 [after IPC and AVX]. We suggest: * Use the IPC recommended standard. * Change from that standard when someone gives you a documented reason to change.
Electronics Forum | Thu Jul 02 10:52:45 EDT 2009 | dyoungquist
For 0402s we use type 3 paste. We have .006 and .005 stencils. The .006 works okay but .005 seems to give us slightly better results. We use a 1:1 ratio for the aperture to match the pad, round pad not needed. With accurate placement and a correc
Electronics Forum | Thu Apr 11 20:35:22 EDT 2002 | davef
Messy. Messy. Messy. Consider gluing these components, until you control your process. It is unclear to us that a single factor drives these defects, but multiple factors that need to be tuned to work well together. PAD DIMENSIONS * Some SM-782 pa
Electronics Forum | Thu Dec 14 20:49:33 EST 2000 | Ian T
does anyone know if a 0402 can be placed by a FUJI CP3, i can pick them but the vision doesn't read it. any help would be appreciated. Ian T
Electronics Forum | Tue Feb 04 22:28:16 EST 2003 | davef
You could reduce the paste by about 70%. Solder balling and tombstoning will be the issues to fight. The drivers to these don't change with the component size. Use the fine SMTnet Archives for background. Aperture Size and Thickness of Solder Pas
Electronics Forum | Tue Nov 03 16:28:53 EST 2009 | davef
We have never dispensed adhesive for 0402, but here's your rules of thumb: * Nozzle diameter should be half the desired glue dot diameter. * Minimum of 0.010" gap between the adhesive and pad, both sides. We'd guess that you should be using a 0.3mm
Electronics Forum | Mon Jul 09 20:46:22 EDT 2001 | davef
Is the glue intended for printed SMD attach? 3 Are you following all the manufacturer�s glue shelf life recommendations? 4 Are you observing all the manufacturer�s glue working life guidelines? Finally, what level of skewing are we talking about?
Electronics Forum | Fri Feb 01 09:20:44 EST 2008 | aj
Thanks for reply, So do you use 1.3 or the 0.7 nozzle for 0603 components ( I suppose trial & error will tell me). aj...
Electronics Forum | Thu Mar 08 12:40:54 EST 2001 | Ralph Merk
We are currently using 0402 resistors and capacitors in our production process. Our equipment is as follows: - DEK 265 - Siemens S25/F5 - Vitronics XPM520(5 zones) - 2% silver solder Alpha WS678 The problem is that randomly some 0402 capacitors are
