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 | Sat Oct 09 03:45:34 EDT 1999 | Brian
| Right now,we have some problem on SMT. Cause of the flux residue | in the connector. Do somebody have the same symptom? By the way, | can i find something to make the flux observe easy or take a photo with the flux. | | | Unfortunately, this pr
Electronics Forum | Sat Oct 06 08:32:09 EDT 2001 | davef
Mr. Wizard is not currently available. You get the wizzer. Maybe your dream date will show later. Get your own lab tests done. Show your potential customer that your boards are clean. That�s the issue. The issue is not how you go about cleaning
Electronics Forum | Tue May 21 17:16:51 EDT 2002 | davef
Larry, Yes, no matter how much you�d like to avoid using NC, you probably will have to start using the stuff, if the design [sales, in your case] types have their way. We can clean WS under 1mm and 1.25mm pitch BGA. For 0.8mm pitch BGA, we use NC.
Electronics Forum | Wed Nov 19 16:35:27 EST 2003 | davef
We'd be incluned to dip the BGA ball in tacky flux, place the BGA on the PTH interposer, reflow that suka, and get on with things. [Take the people involved out to lunch with the money you save on not buying a stencil.] On damaging the glop top, we'
Electronics Forum | Thu Nov 20 09:19:01 EST 2003 | markhoch
What do they say? Not too much as of yet. (I haven't actually recieved them yet.) The parts are being custom made by my customer. I've already bought my stencil, so I'm thinking I'm just going to try and stencil the tacky flux right on the pads and p
Electronics Forum | Tue Nov 18 15:03:39 EST 2003 | Mark
Yup. I'm attempting a small, but very important experiment. I need to solder several Lead-Free Globtop BGA parts to a Pin-Socket interposer assembly. I'm trying to come up with the best way to do this. I'm thinking of using lead-free solder paste, (b
Electronics Forum | Thu May 26 16:41:00 EDT 2011 | scottp
Here's what I do: - Test Surface Insulation Resistance (we're in the high reliability market and use a test significantly harder than IPC's). I also test SIR in combination with other assembly materials like conformal coatings and wave solder flux
Electronics Forum | Thu Jul 30 13:52:34 EDT 2009 | davef
Thoughts are: * 215-220 temperature at the leads is not real hot for leaded assembly. * It's peculiar for component leads to dewet. Sometimes non-wetting occurs along the edge of the lead where the lead is not plated. * How do the leads of a removed
Electronics Forum | Thu Jan 07 16:46:05 EST 1999 | Steve Gregory
Hey ya'll!! SUCCESS! I was able to get that monster off!...(Now I just gotta' be able to get it back on right...hehehe) If you remember, the whole reason I had to rework it was because somehow they got the hole positions wrong in the board for
