Electronics Forum | Thu May 11 15:11:14 EDT 2006 | patrickbruneel
I assume you talk about wave soldering. No-clean fluxes are widely used since 1987 or earlier and after all these years they have proven to be reliable. If you clean the board or not the dust bunnies etc. will still reach the board surface. If you us
Electronics Forum | Tue Sep 05 16:26:53 EDT 2006 | Bill
Thinking about this auto-mode on Grid-Lok..... Ok, the board is warped, lets say positively, the pins conform to the warped board... what about the effect on top side and squeegee pressure? It will be much higher and could damage stencils, right? Pos
Electronics Forum | Wed Jan 03 21:20:22 EST 2007 | davef
Comments are: * General purpose RTV (RTV-108) releases an acetic acid (vinegar) during cure and corrodes copper, brass and sensitive metals. It is therefore NOT for use in delicate electrical or electronic applications. However, there is an electrica
Electronics Forum | Sun Feb 04 15:06:20 EST 2007 | Scotty
Profile should have a longer cool soak. Verify as was mentioned all pin/fixture support through out the entire process. Print, Place, pre reflow hand load, post reflow, carriers, ICT, Depanel and FCT. Conformal Coated or Potted? Mylars work well for
Electronics Forum | Fri Feb 02 08:36:14 EST 2007 | CK Flip
Wow, I cut first cut my teeth in the Industrial motor control industry. My 1st company made motor control products like variable speed drives, solid state overload relays, soft starts, etc. and in our shop, we used nothing BUT Dow Corning silicone p
Electronics Forum | Mon Mar 26 22:42:20 EDT 2007 | sleech
The issue is of drying moisture-sensitive surface-mounted packages is likely to become even more of a baking-headache in light of the upcoming "D" revision to IPC/JEDEC 020. We have taken a simular approach that a major cellular phone firm took in
Electronics Forum | Thu Mar 15 12:22:13 EDT 2007 | Steve
Hi All! There were a few rigid flex assemblies brought to me this morning with some scratches in the coverlay of the flex. They are pretty minor, but they do go down into some traces a bit. I don't think the traces are really signal traces, but are
Electronics Forum | Tue Jun 17 12:57:26 EDT 2008 | sleech
You are correct. For the 70 deg. C drying temperature to be effective, the relative humidity must be as near to zero as possible. A pulling a vacuum on the chamber is an inexprensive and reliable way to accomplish this. Contrary to some claims, our e
Electronics Forum | Thu Jun 05 18:11:53 EDT 2008 | jlawson
Also coating costs depends on solids content vs final dry film thickness. Some newer UV coatings are 100% solids, so what you put down you get on the PCB after cure, use no solvents at all. So a cost to look at are qty of PCB per litre of material. T
Electronics Forum | Fri Jan 30 14:20:55 EST 2009 | scottp
I do a lot of thermal cycle testing of new components for my company and often when I lay out a test board I'm trying to simulate 4 or 6 layer boards but I don't need them for routing so I just use a solid fill of a cross-hatch pattern. I've done it
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