Electronics Forum | Thu Apr 15 20:07:38 EDT 2010 | userrich
"BiRAL SC" is a water displacing cleaner. - effective for cleaning most metals including carbon- and stainless steel, copper, aluminium etc. - cleans electrical motors, brush holders, bearings, armatures etc, - cleans and treats most types of plastic
Electronics Forum | Tue Jan 26 10:26:54 EST 2010 | bandjwet
Dear SMTNetters: Based on your experiences is it really necessary to have today's YAG laser-fabricated stencils electropolished? I undertsand that this "requirement" is a carry-over from the days of CO2-fabricated lasers where the hole wall quality
Electronics Forum | Wed Jan 27 13:55:47 EST 2010 | patrickbruneel
Randy, Thank you for the acknowledgment. The IF2005Mz is a solvent based flux (not water soluble). I agree with you that the original IF2005M had a very narrow process window. In 2000 we modified the blending procedures and blending equipment which
Electronics Forum | Mon Feb 01 14:24:45 EST 2010 | boardhouse
Hi Jamyboy, I would find out from DDI what the 70% was rejected for, Could have been a repeat issue due to a scratch in artwork or something like that. I would not just jump and tell them to rebuild all until you know the facts. DDI is a very re
Electronics Forum | Tue Feb 02 08:50:20 EST 2010 | stepheniii
Is it possible the 70% are marginal and the board shop is being uber picky? I've seen a huge range of quality standards for board shops. And considering the cost of the boards I think a boardshop tour would be warrented to get firsthand knowledge o
Electronics Forum | Tue Feb 02 09:05:41 EST 2010 | rway
First, why are they rejecting the boards? Are they rejecting them based on your acceptable limits or is it due to the standards they are using. Companies typically have standards that the board house must adhere to before shipping the product (depe
Electronics Forum | Tue Feb 02 17:10:03 EST 2010 | flipit
Remember this is a 30 layer PCB. If it is built in a multi up panel, there is lots of room for error. Lets say there are 10 circuits per panel. Say you have a 10% scrap rate that happens randomly within the 10 up panel of circuits. Apply this 10%
Electronics Forum | Fri Jan 29 12:04:13 EST 2010 | davef
In response: * We know of no "videos about Pb-Cu intermetallic." Intermetallics are usually observed in microsections of solder connections. * We are unaware of "Pb-Cu intermetallic." In most soldering results in a copper-tin intermetallic. * Trainin
Electronics Forum | Fri Jan 29 21:31:46 EST 2010 | aqueous
I would recommend the following paper entitled "Cleaning for Reliability Post QFN Rework" by Mike Bixenman (Kyzen) and myself (Aqueous Technologies). While it discussed cleaning under QFN's in a batch environment, it is also applicable to cleaning u
Electronics Forum | Fri Feb 05 11:50:54 EST 2010 | baildl632
I just browsed this article and found no mention of cleaning with a "sonic" washer. We have a PMR Systems Ultrasonic Stencil Cleaner. The manual says it works well on cleaning PCB's for varoius reasons. It works excellent for removing lead. We can wa
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