Electronics Forum | Mon Jan 30 06:29:51 EST 2006 | slaine
we shouldnt be talking about lead free we should be talking in terms of RoHS compliant. HMP solder is exempt in the directive even though it has a hig lead content (93.5%) as no other alloy will melt at the same temperatures 298. as HMP is exempt wi
Electronics Forum | Fri Jun 02 16:22:53 EDT 2006 | Randy
Do not believe every thing your suppliers tell you, even a written cert does not guaranty compliance. We recently purchased a Niton XRF analyzer. The first day in use we found component�s that were made for us "RoHS" that were far from compliant. Peo
Electronics Forum | Fri Jan 13 10:39:53 EST 2006 | samir
Good one! I remember at my old company, the auditors, both internal and external would go immediately to the refrigerator where we kept our glue and solder paste and then they would spend most of their time there, because they were afraid of all of
Electronics Forum | Fri Jan 13 16:00:07 EST 2006 | DannyJ
Sr. Tech, First, thank you for the great laugh! Second, I always go for that 'deer caught in headlights look' that they get when you start asking your questions. As a caveat, I have learned to slow down when they start drooling out of one side of
Electronics Forum | Sat Jan 14 06:38:04 EST 2006 | DannyJ
Hi Ken, Good question, and I did search for what you are asking, but unable to find anything conclusive about using tacky flux vs. solder. In reliability, it depends on which section of the process you are talking about. Mainly (and there are sev
Electronics Forum | Thu Jan 19 06:25:42 EST 2006 | bwet
There are several life studies (see for example http://www.solder.net/stencilquik/articles.asp) which point to higher reliability of reworked BGAs using solder paste vs flux. The theory on the mechanisms which allow this to happen are as follows: 1
Electronics Forum | Fri Jan 13 15:55:07 EST 2006 | DannyJ
Hi Mark, I'm guessing from your letter that you are not asking about traces, just component values. We use a tool called 'smart tweezers' (catchy, eh?) to do jsut what you are asking. Very easy for our QA department to use a BOM to compare agains
Electronics Forum | Wed Jan 18 15:38:13 EST 2006 | adlsmt
I would use an SPM if it was my choice(for a semi-auto). You should be able to get a used one with vision for less than 10 grand. I would not use one without vision for fine pitch, although you probably could get away with it. The first few they made
Electronics Forum | Thu Jan 19 13:32:10 EST 2006 | daxman
Hi David, I've only ever worked with MPM, but my experience with them has been excellent. I've recently started with a new company, and we have a proto line that uses an SPM. I found the worknest a little frustrating at times, but the set up is fa
Electronics Forum | Wed Mar 15 15:04:51 EST 2006 | Fliyer32
I tried MS2 for almost two weeks and I can see it works. MS2 is more a preventive tool rather than a solution to convert pour on top of the dross. Very important if you use this stuff is that you do the encapsulation of the wave, the bigger the surfa
