Electronics Forum | Mon Dec 19 12:23:49 EST 2005 | Amol Kane
there are no issues with running leaded lead free parts with snpb solder. the problem arises when lead-free BGAs are run with SnPb solder. running hotter (i.e mimicing the SAC reflow profile)merely ensures that the sac solder melts and mixes with the
Electronics Forum | Sun Dec 25 17:55:56 EST 2005 | Mika
No one seems to have firm research that says one thing or another. It's all just "some guy told me" kind of stuff, and that's a worry. >Without firm absolute data, it's all a guess or rumor, which has a huge chance of being incorrect. >Does anyone
Electronics Forum | Fri Dec 02 08:57:39 EST 2005 | russ
You hit it on the nose Pavel, the fluxes in paste are formulated to have 2 activating points if you will, one at low temp and one at high temp. when the low temp flux gets killed this is what you will see. This is the main reason we opted out of K
Electronics Forum | Thu Dec 01 14:47:25 EST 2005 | Amol Kane
Hi, I am testing some lead-free assemblies using ATC. it was suggested to me that if i do in-situ testing, then i should measure the starting resistance, and subsequent resistances values after n cycles, and when the resistance value increases by 1 o
Electronics Forum | Fri Dec 02 07:53:25 EST 2005 | solderiron
Get a demonstration, on most packages these systems can see down a row. You don't see solder flux residue with X-Ray. You don't see the intermettalic bond with x-ray. They are some what expensive but together with X-ray you have an excellent quality
Electronics Forum | Fri Dec 02 09:12:20 EST 2005 | chunks
We have both Ersa scope and X-Ray. Everyone uses the X-ray because it's a quick way to check for shorts, which seems to be the line supervisors only concern when it comes to BGAs. The Ersa is fine, but it's only real use is to examine a couple of r
Electronics Forum | Wed Dec 14 06:18:20 EST 2005 | tk380514
right again grant, consider the fact that if you spend enough time inspecting the soldered boards/pre-oven and check the BGA solder paste pads before, and clean the stencil regularly and check solder paste dryness, check oven profiles then after chec
Electronics Forum | Wed Dec 14 12:57:23 EST 2005 | grantp
Hi, Wow, that's cheap. I did not know they were available that low cost, and we had been quoted much higher for the Ursa scope, so that's why I thought why bother, and lets put it into xray. I bet Superman would have a terrible time working in an S
Electronics Forum | Sun Dec 04 07:37:09 EST 2005 | stepheniii
At least here the solder paste industry is competive, and each rep wants to be sure you are using their paste properly. Therefore they are willing to help you out. They are afraid a competitor will come in and show you his paste is better when in f
Electronics Forum | Sun Dec 04 20:03:37 EST 2005 | stepheniii
Not sure, but I would guess we used less than 100, 500 gram jars last year. Next year probably double or triple that. I think for the first 6 months of operation or so (before I started) they were pretty much using only samples. Nowhere near what a
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