Electronics Forum | Mon Feb 19 22:56:20 EST 2007 | davef
Russ We agree with your comments on plugging from one side only. But... We believe that it IS possible to trap process chemicals [technically, not flux] in a blind [or any other] via. This can be done by plating the via closed, rather than pluggi
Electronics Forum | Thu Apr 17 10:44:24 EDT 2008 | rculpepp
I'd suspect contamination also, possibly from the board supplier. Sr. Tech's post mentioned what looks like a blister on the board, in the upper right of the Q19 photo. This could very well be a contaminate from the PWB fab shop. I've seen similar pr
Electronics Forum | Tue Jan 13 12:54:11 EST 2009 | boardhouse
Emil, Part of the problem it sounded like is that the color was not clearly defined as light or dark in Matte or gloss. Your example of car paint would have the same issue if you just ask them to paint your car green. What color of green would y
Electronics Forum | Mon Jan 26 13:13:07 EST 2009 | rgduval
We've had this same problem with the solder wicking to the component terminations. However, in our case, we did not see the pads turning a silver-white color...rather, they exhibited a tarnishing/darkening of the gold. We determined that we had som
Electronics Forum | Fri May 07 00:52:24 EDT 2010 | boardhouse
Hi Derek, just curious of one thing - are the vias within the BGA's the only vias covered or are all vias on the board covered. Just trying to figure out what is making this area different from the rest of the board. Regarding leaching, I do not be
Electronics Forum | Fri Apr 23 17:59:54 EDT 2010 | hegemon
Therein lies the issue. Unknown storage conditions before we received the PCBs, date codes just expired (2 weeks), first article is de-lam city! Had a bad feeling about it. Have read some studies showing that there is no linear tie in of visual cha
Electronics Forum | Wed Sep 01 14:47:42 EDT 2010 | rway
***Correction*** I stated, "1-2mm is pretty small (that's roughly 4-8mil). You might consider making your fids larger, perhaps 7-10mm (30-40mil)." My conversion was incorrect. I was brash in thinking I could do it by hand. Sanchu 70 is right, 1mm
Electronics Forum | Wed Aug 31 08:27:45 EDT 2011 | rway
AOI if needed? I take it your AOI/AXI is not inline. Too bad. Our AOI is the first line of defense against induced errors in the mfg process. It's invaluable. How do you know it's not needed, or that it won't be needed in the future? Do you hav
Electronics Forum | Wed May 13 13:22:39 EDT 2015 | cohlmann
Hello Everyone. We are setting up our first SMT line and are looking for recommendations on printers and reflow ovens. Currently most of our manufacturing is outsourced and we want the ability to manufacture all of our products in-house. One impor
Electronics Forum | Wed Sep 22 22:18:37 EDT 1999 | Dave F
| I am attemping to gather as much information on the issues with and progress in solutions for manufacturing Pb free products in response to European initiatives (WEEE). I am intereested in component issues with As Made lead terminations (no Sn/Pb)
