Electronics Forum | Tue Mar 01 10:43:59 EST 2005 | Rob
Hi Greg, Is anyone logging the errors at QC/touch up stage so they can feed them straight back to SMT and fix them? (i.e. skipped components, poor paste coverage etc) Obviously the faster you spot an error the cheaper it will be for you. Cheers,
Electronics Forum | Tue Jun 28 09:13:46 EDT 2005 | russ
It appears that the reflow profile was incorrect or the paste was in bad shape on these boards from what I can see. I personally have never seen a board finish cause this symptom.
Electronics Forum | Tue Jun 28 10:41:57 EDT 2005 | GS
I am not an expert but just for my understanding: - solder paste used ? NC ? other ? - reflow in Air or N2 ? - temp ramp up before soack (�C/second) ? Tnks GS
Electronics Forum | Fri Jul 08 09:14:49 EDT 2005 | Jason Fullerton
I've tested boards with SN100C HAL finish, and wetting to the PCB finish was poor at best, using a no clean SAC305 paste.
Electronics Forum | Mon Jan 09 11:26:08 EST 2006 | abhinavajmera
Dear Grant, Thank you for the reply. It is really a valid reason and I did check for it but nothing turned out that way. Can you think of some other reasons if the process parameters are the same used earlier when there was no problem at all. Regard
Electronics Forum | Mon Jan 09 13:41:09 EST 2006 | slthomas
Take a look at the boards, too. Could the HASL be different (in particular a domed or convex cross section) than what you're used to seeing? Is your printer actually working properly?
Electronics Forum | Thu Jan 12 20:50:09 EST 2006 | davef
Chunkie Why doesn't your company wash those little blue smirf coats for the people? Requiring employees to wash smocks is very poor practice, because the company looses control over the wash process, materials, or schedule. Do you test the smocks
Electronics Forum | Fri Jun 09 08:17:07 EDT 2006 | amol_kane
did you look at the pad vs the stencil design? are you putting down enough solder paste on the pads? what are your reduction ratios for these packages?
Electronics Forum | Wed Jun 14 13:37:23 EDT 2006 | grantp
Hi, We have just started running this Koki paste and it's working really well. Funny, the joints are a lot more shiny than I expected. Grant
Electronics Forum | Wed Jun 14 15:17:15 EDT 2006 | Chunks
We too have run different pastes and found similar results. I do not repsond to this post to help the Doctor out.
