Electronics Forum | Tue Nov 01 12:29:35 EST 2005 | russ
I just noticed that you mention 2-5mm off, that is huge! It would seem to me that there is an external force here to move a part that far. Things such as a heavy air stream that for some reason is really hitting this part, something on the PCB unde
Electronics Forum | Mon Oct 31 08:51:05 EST 2005 | Amol
what methods are being used by folks in the industry for identifing LF ckt boards on the factory floor. I have a list of methods that an be used (like diff solder maks color, LF bar codes, LF logos and so on) but would appreicate your inputs on the s
Electronics Forum | Fri Nov 11 09:06:08 EST 2005 | russ
We use at least an 8mil thick stencil for these parts. The Columns do not collapse or reflow so you need to ensure plenty of solder volume for reliable attach and to make up for the coplanarity of the component itself. I assume we are not really ta
Electronics Forum | Tue Nov 01 09:21:39 EST 2005 | jdengler
I've never heard of this before. If your solder paste is at the correct temperature, and your process is under control you should have an acceptable print the first time. This sounds like a terrible waste on time and paste. Set up a DOE to prove tha
Electronics Forum | Wed Nov 02 11:14:45 EST 2005 | Doug
I am doing lead free testing on a Vitronics selective machine with a 4 mm nozzle. The finishes I am testing are ENIG, ImSn, and ImAg. The problem I am encountering is achieving good top side wetting. Has anyone had any luck with this type of an ap
Electronics Forum | Thu Nov 03 10:49:11 EST 2005 | russ
This is what I would propose, Place and reflow the board without the BGA with your lead process, remove the solder from the BGA pads if you cannot mask off the apertures in your stencil. Then place the BGA and reflow to SAC requirements with a rewo
Electronics Forum | Fri Nov 04 16:08:14 EST 2005 | BK
There are various China made oven which can do the job. Price for Reflow oven is about USD35K and Wave soldering is about USD55K. If you need more info, please contact us. BK Email : sales@hynergy.com.sg
Electronics Forum | Wed Nov 09 13:46:07 EST 2005 | russ
Anybody out there have any experience with the above? We are looking into buying one of these things. We need to process large thin boards to small thick boards both pb and pbfree solders. Components will range from uBGA and CSP to ????? It is a
Electronics Forum | Tue Nov 15 09:50:40 EST 2005 | chunks
Good ol'Wenesco. That's one of my old products they have in their advertising. The tricky part about dip process is in the fluxing. Spray fluxing a populated board from the bottom looking up can be a challenge. You'll notice the areas you missed
Electronics Forum | Fri Nov 18 10:03:32 EST 2005 | dougeidle
Speedline ELECTROVERT sells a Quick Change Pot option and accessories. The option is available as a field Upgrade. Our web page has a dedicated PB Free process section; http://www.speedlinetech.com/lead_free/index.aspx I work for Speedline. I am t
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