Electronics Forum | Mon Oct 12 08:07:45 EDT 1998 | Earl Moon
| I have datas to substain that a not wetting PCB ( the HAL oxided or not uniform in thickness )if soldered in reflow, it shows voids with X-Ray inspection.The voids are in side all the joints not only on the solder pads levell. | | Is there a techn
Electronics Forum | Thu Jul 20 14:52:05 EDT 2000 | Bob Willis
If you are talking about Pin In Hole Reflow that is not true, I hope it was not my friends at Speedline that told you that. Stencil printing of paste for through hole reflow can be done. If you get all the parameters right it can give you joints lik
Electronics Forum | Mon Jan 31 12:24:24 EST 2000 | Dave F
Robert: Several points: 1 Dross is a mixture of various things with no "fixed" composition: � The obvious things are metal oxides mixed with metal and this can vary in color with temperature and composition - remember some intermetallic oxides form
Electronics Forum | Fri May 22 13:14:42 EDT 1998 | Earl Moon
| | | | Y'all: IPC set-up a site addressing the environmental issues of the printed circuit fabrication industry. Some of it is interesting and applicable to the assembly business as well, even though not aimed directly at assemblers. IPC has rece
Electronics Forum | Mon Oct 14 12:56:50 EDT 2002 | davef
His technical contribution to the forum. From these 24 postings, we can see that 75% of Sean�s postings have a decided commercial bent, as followings: * Could be argued that the posting is a good technical response. Percent of postings 25%. * Could
Electronics Forum | Fri Jun 09 15:46:34 EDT 2006 | samir
I say: �Wave flux needs to be heated to certain activation temps which won't be repeatedly achieved with a manual soldering process. Plus, you won't burn off any residual activator as you would if the board were immersed in a solder bath.� Muse say
Electronics Forum | Tue Jan 15 12:37:17 EST 2008 | gregoryyork
SORRY I did not offer a solution so here goes - The best way to get rid of this issue if you cant change flux is to reduce your flux consumption to a minimal with a spray flux and keep the heat REALLY high to boil off the alcohol before it can be abs
Electronics Forum | Thu Jan 13 15:19:51 EST 2000 | Dave F
Hey Jack: It's certainly "do-able." Conformal coating adhesion testing was done as part of the "Evaluation of Low Residue Soldering for Military and Commercial Applications: A Report from the Low Residue Soldering Task Force," published by Sandia Na
Electronics Forum | Fri Dec 27 12:42:36 EST 2019 | rgduval
In your video, it looks to me as though the bottom of the glass is too low, but, I can't tell for certain. As a general rule, keep the top of the wave no higher than the mid-point of the PCB. Top flow will take care of itself thanks to flux and cap
Electronics Forum | Fri Dec 27 17:40:55 EST 2019 | rgduval
Using no-clean flux will make the boards very difficult to clean. If you can switch to water soluble flux, your life will be much easier. The "icicles" lead me to think that the board isn't getting hot enough in the pre-heat cycle, and/or there isn
