Electronics Forum | Tue Sep 18 06:19:46 EDT 2012 | jam
we have a 1809 EXL one (reflow oven/lead free approved)
Electronics Forum | Wed Sep 26 16:42:06 EDT 2012 | ferrog
Per the pictures you sent it may be a Pad Design issue, you need to go to the Part Number Spec and Look for Suggested Pad Layout
Electronics Forum | Wed Sep 26 18:30:41 EDT 2012 | garym4569
Thanks for the input everyone. We had also suspected pad design, but wanted to get input from other sources. The design engineer has implemented revised pad design in a revision set for production next week. Thanks again, Gary M
Electronics Forum | Mon Oct 15 09:55:50 EDT 2012 | anvil1021
These microvias were plated shut? Could there have been some out gassing of these plated shut areas during reflow? I agree with your void % assesment unfortunately my Superiors do not... Thank you for the input.....anvil
Electronics Forum | Mon Oct 15 11:03:49 EDT 2012 | anvil1021
No we havent Xrayed any before reflow, but when we attach the BGAs with just flux they are void free? Thanks....anvil
Electronics Forum | Mon Oct 15 08:15:41 EDT 2012 | scottp
Is the designer's concern that the parts will fall off when hanging upside down during reflow? We've been doing this for decades and our test if we think a part is marginal is to glue a 2nd (and sometimes 3rd) part to the back and send it through re
Electronics Forum | Mon Nov 26 11:33:25 EST 2012 | pbarton
We print paste directly on to the parts then invert, place & reflow using a dedicated I/R rework station. Works well for us on a wide variety of footprints.
Electronics Forum | Thu Nov 29 14:11:33 EST 2012 | davef
When you say "solder paste layer," what are you talking about: * Post-print / pre-placement quality inspection * Post-reflow solder inspection * er what?
Electronics Forum | Thu Jan 17 20:17:55 EST 2013 | duchoang
We have got lots of voids at ALL LGA. Anyone has ideas to get rid of this issue or just minimize the size of voids ?. With the same paste, same reflow oven, looking good profile, we don't have that problem with BGA. Thanks.
Electronics Forum | Mon Jan 28 16:12:47 EST 2013 | emeto
I will treat it as any other BGA. Drill a hole in the board, put thermocouple and do your profile.
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