Electronics Forum | Mon Dec 01 14:40:54 EST 2008 | snaggletooth
DC powered Power-up and ageing burn-in equipment, preferably non-product specific, starting from room temperature down to -41 degrees celcius and up to +71 celcius at a rate of 7 celcius per minute. But anyone who could suggest a manufacturer would b
Electronics Forum | Tue Feb 08 04:27:55 EST 2011 | thomas111
hi, I am a Hardware designer . One of my products is undergoing a Reliability test in which a resistor shows a high value on board from its specified value .However it retains the original value when its cooled under room temperature. The resistor
Electronics Forum | Wed Sep 19 12:27:52 EDT 2012 | tombstonesmt
Looking into possibly receiving samples of polyester masking dots for conformal coating. Our usage of polymide dots have really increased in the past months and we're always looking for a reduction in costs. The only information I've found is that po
Electronics Forum | Fri Apr 10 12:23:27 EDT 2015 | utosun
The recommended wash concentration for stencil cleaning with VIGON SC200 is 25% and this should be confirmed using the ZESTRON BA-20 bath analysis kit. Additional cleaning recommendations are: Wash temperature should be approximately 25 degrees C. /
Electronics Forum | Fri May 17 15:53:47 EDT 2002 | davef
Based on what you�ve said, comments are: * There is no reason not to expect a trace of Zn in your 85/15 Sn/Pb solderability protection, but Sn/Cu IMC are more prevalent than Zn. * Intermetallic growth and oxidation are very different materials proper
Electronics Forum | Thu Jan 27 19:14:27 EST 2000 | Dennis
Thanks! It is right that solder paste is somewhat responsible for misssing components in our case. I took a look at the board after placement and I found that component hit the paste, but no where on the board. I guesss dry solder paste (operater pri
Electronics Forum | Wed May 15 10:55:35 EDT 2002 | geoff_goring
As I thought..... This is probably why most journals and standards I have studied hold shy of even attempting to predict shelf life. They certainly hold off of any predictions when based on accelerated life testing too. The component lead is a cop
Electronics Forum | Wed May 11 15:30:12 EDT 2005 | amejia
The problem is that we don't use a wave solder machine. Our process right now is that we mask the holes, let it sit at room temperature until it dries, then conformal coat the boards with Humiseal. And, we cannot have the boards ready the day befor
Electronics Forum | Sat Oct 29 09:10:17 EDT 2005 | davef
You're correct that Room Temperature Vulcanizing (RTV) adhesive is pretty much a cosmetic when it comes to securing components. Beyond that it contains silicone, which produces unsolderable connections in electronics. Further, many RTV seep acidic
Electronics Forum | Wed Sep 20 16:27:06 EDT 2006 | proy
As we are a low volume shop, the extra handling is not too much of a concern. My biggest concern is if the flux sitting on teh board for a long time (few hours) is going to cause any problems in solderability. My thought is that it should not as it
