Electronics Forum | Tue Dec 18 08:08:09 EST 2007 | itwasbill
Hi all, How can I convince my equipment purchasing supervisors that to properly solder BGA's a 7 zone oven would be far superior than a four zone? We currently own a 4 zone oven and I'm fearful that the BGA will not get adequate heat for solder
Electronics Forum | Wed Dec 19 23:53:04 EST 2007 | daxman
Hey Logan, This is an excellent resourse and should have pretty much everything you need. http://www.national.com/packaging/parts/MDIP.html#8 You get a list of a lot of different components and their pictures. You can view their dimensions and look
Electronics Forum | Wed Dec 19 14:41:47 EST 2007 | gersla
Dear Steve. We are EMS company and we are getting wide range of components from our customers. Some of them came in trays, that can withstand up to 75 degree maximum. If someone will not pay attention to this the tray get damaged (if there is some Q
Electronics Forum | Thu Dec 20 10:23:12 EST 2007 | slthomas
You could have said "why don't you just flop 'em over twice into the right tray?" lol. Yeah, that's the right way. I was kind of focused on what I had to do here to get two different parts from full trays into two cut-in-half-the-long-way trays sinc
Electronics Forum | Sun Jan 06 22:36:08 EST 2008 | mac88
My recommendation is that you send all your question to Mumtaz Y. Bora, Sr. Staff Component Engineer from Kyocera Wireless (mbora@kyocera-wireless.com). She is also a member of the committee that is writing the new specifications for Moisture Sensit
Electronics Forum | Wed Jun 18 01:47:25 EDT 2008 | sleech
Innovative Drying Co., considered this possibility early in our experiments. The rate of chamber pump-down is not a consideration. However, the selection of the vacuum pump is critical. Avoid oil-sealed pumps at all costs. A poorly maintained oil-tra
Electronics Forum | Wed Jun 25 12:48:51 EDT 2008 | sleech
I would love to see the documentation of the experiment that indicated that a 24-hour/70 degree C bakeiing cycle at 10Pa is more effetive than a 24-hour 125 deg C baking cycle at normal atmosphere. We have looked at the old Levey-Perlmann paper and f
Electronics Forum | Sat Jun 28 13:53:07 EDT 2008 | sleech
Fowler: Thank you for your documentation. Your finding roughly coincide with our own. We also found that 70 degree baking removes 50%/60% of the ingested moisture from moisture conditioned MSD packages We ran an additional experiment that compared
Electronics Forum | Thu Dec 20 07:50:12 EST 2007 | realchunks
Good to know there are a few smart people left in this industry like Darby. I love how everyone assumes the original poster was only talking solder paste. We use screen printers for five different materials. Some of which we triple print by design
Electronics Forum | Thu Dec 20 08:00:50 EST 2007 | avalancher
Many years ago, we used to double print. The way we did it was with a rubber squeegee set to do a flood stroke, followed by a return cleaning stroke with a metal squeegee. Why?! Well, this was in the days before Laser etch, and because the chem bat
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