Electronics Forum | Tue Dec 04 14:26:56 EST 2007 | ratsalad
We use the same oven for both Pb and Pb-free assemblies. We have been for about two years. We have not seen any issues with contamination. I can't imagine how any Pb would end up in a Pb-free joint in the reflow oven. The Pb doesn't vaporize, the
Electronics Forum | Wed Dec 05 03:52:15 EST 2007 | longlee
I disagree with the opinion what use the same reflow oven for both Lead and Lead-free process. As you know, the RoHs restrict the presence of certain substances, including Pb,Mercury,Cadmium,Hexavalent Chromium,PBB,PBDE. Maybe yon don't find any iss
Electronics Forum | Wed Dec 05 09:26:56 EST 2007 | ratsalad
Ms. Chunks, You are correct nobody mentioned anything about RoHS. And, right or wrong, our quality department's official stance is that "the only thing about RoHS we have to be concerned about in our industry is Pb". It is not just our quality dep
Electronics Forum | Wed Dec 05 10:46:54 EST 2007 | realchunks
If you only manufacture PC Boards with valid RoHS compliant componenets, then yes, your Pb is your only concern. If you add any type of other fastener, housing, wire, etc... it also must be RoHS compliant to be certified. Too many people focus on "
Electronics Forum | Wed Dec 05 10:58:59 EST 2007 | shrek
Mr. Long, me lad, I don't follow. You say stuff about RoHS and all the banned materials covered by RoHS, but what is your theory on how banned substances can get on a RoHS board if you are running both Pb and Pb-free on the same oven?
Electronics Forum | Fri Nov 30 06:16:25 EST 2007 | aj
Hi all, What do most of you aim for when profiling BGAs ? Currently I aim for time above 60 or 70 secs but I read a report that 40 secs would be more suitable. Also peak temp - I aim for 240-245 but again this report stated 230-235. any input app
Electronics Forum | Fri Nov 30 14:38:42 EST 2007 | ratsalad
One of our former SMT Technicians used a component we pick and place for this purpose. The component is a bond pad that is soldered to a ceramic PCB during SMT assembly. The assembly is now obsolete. I tried looking up the manufacturer's part nu
Electronics Forum | Fri Nov 30 22:59:34 EST 2007 | bvdb
Hi Paul, It may not be the perfect replacement for a proper fiducial but I have had some success using thru-holes for fiducials. The tightest pitch part we place is 0.8mm however 0.032"). If the thru-holes are drilled accurately and you are able t
Electronics Forum | Fri Nov 30 23:28:54 EST 2007 | mika
BTW, Option 6. Bear in mind though, In the stencil printer if you run into a problem like this, it will not work with the holes...Only what's in the stencil... We have under some rare circumstances used 1-2 pad's on opposite corners and on very large
Electronics Forum | Mon Dec 03 11:49:53 EST 2007 | davef
Paul: We all live in Dilbert-world. Some people think Scott Adams is kidding, but we know he's not. Give yourself a break and just use replacement pads used in repairing damaged BGA circuitry. For instance: http://www.circuitmedic.com/products/CS015
