Electronics Forum | Thu Feb 05 16:44:19 EST 2009 | stepheniii
I don't think there is any environment where lead free is as good as "real" solder. When you say "high vacuum" do you also mean low gravity? i.e. space? If so my understanding is when the tin whiskers short out the vapour does not settle down but in
Electronics Forum | Fri Jan 30 18:24:09 EST 2009 | gsala
Buenas dias Jos�, It shoul not be a problem. We had situation like that when in the early 2006 the Lead Free fase in Pb fase out, no pbm on solder joints. Today, after about 3 years, those cards are stil working in the field without any defect. Reg
Electronics Forum | Fri Jan 30 17:39:47 EST 2009 | CSM84V
I was wondering what the difference between "Y" type feeders and "HM" type feeders where? Also I understand that the "FV" type feeders are pneumatic rather than manual advance, what is the purpose for pneumatic advance if manual works just fine? Are
Electronics Forum | Mon Feb 02 08:50:44 EST 2009 | steverog
I am looking for the following information or where I might find it? 1. In what year were the first SM passives (R, L and C only) made available? What sizes 2. What year for subsequent parts in smaller sizes. In essence I would like a time-line sho
Electronics Forum | Tue Feb 03 13:53:41 EST 2009 | allwave
The spec for all PCB suppliers is "solder mask over bare copper using LPI on external layers (green)". The flux we use is No clean 270WR flux (AIM). As far as process parameters, like I mentioned before, same parameters for several suppliers, only on
Electronics Forum | Tue Feb 03 15:23:21 EST 2009 | gregoryyork
Hi George This is down to the different cure temperatures used during PCB process. No problem with the flux or your settings You should be seeing a waxy greasy oil like substance on the dirtier board. Or the resist has absorbed the flux residues not
Electronics Forum | Wed Feb 04 16:33:40 EST 2009 | davef
Your specification for all PCB suppliers of 'solder mask over bare copper using LPI on external layers (green)' is broad and open to the use of material from many possible LPI suppliers by your board fabricator. In at least one case, it appears that
Electronics Forum | Mon Feb 02 16:31:09 EST 2009 | shanebeard
I turned on my standard Philips Topaz today, and the vision system did not come up with the rest of the machine. If there is anyone out there that could walk me through troubleshooting this problem, it would be greatly appreciated. I'm thinking the
Electronics Forum | Mon Feb 02 16:45:05 EST 2009 | alexander_jw
Looking for a clear conformal coating that can protect a PCB outdoors in Southern CA. Board is 24" x .25" x .03125. Require product to withstand some flexing during installation because of its very thin profile. Must hold up to environment for 10yrs+
Electronics Forum | Mon Feb 09 15:41:38 EST 2009 | diamondmt
I would be glad to help you out in recommending a couple of coating choices,(at a very competitive price) but I believe you will have the most success with Parylene coating as long term reliability looks to be very important as well as flexiblity. Th
