Electronics Forum | Fri Jul 26 17:02:07 EDT 2002 | davef
Never heard of flux residues forming a lense. The first thing that comes mind when thinking about your 'fog test' is: Ionic Contamination While this seems pretty far afield from your interest in optical effects, I'll continue briefly. A reverse
Electronics Forum | Thu Aug 15 09:02:04 EDT 2002 | davef
The fine SMTnet Archives have a couple of threads on double side reflow. Bob Willis Technical, Director, SMART Group, produced a Charity Report on the specific process of Double Sided Reflow Assembly. You can get the report from the SMTA [ http://w
Electronics Forum | Wed Aug 21 12:57:41 EDT 2002 | dragonslayr
I would like to address several issues. First, your reflow is 150 PPM for the same exact assemblies that have lower PPM's? or are you giving a 150 PPM rating for all products produced through the reflow process in a specific time period? Reflow is a
Electronics Forum | Thu Aug 29 12:48:26 EDT 2002 | slthomas
Assuming all things are equal (attention to good DFM guidelines, well trained and capable operators, well maintained equipment, etc.), which would you expect to have the higher process yield, standard SMT/through-hole all topside, or all SMT bottom (
Electronics Forum | Wed Nov 06 05:13:01 EST 2002 | Dreamsniper
Crystalline flux if it is really clear should not be a problem. We were using Amtech paste before and we have the same results. Sometimes we mistakenly see it as a dry joint because of the reflections from the lighting of our Metcal inspection system
Electronics Forum | Wed Nov 13 21:16:28 EST 2002 | Vinny
Hi All, I am producing a lot of high cost PCBA where the pCB material is the `ROGER' material. Due to some of the high components and handling we get pad lifted issues sometimes and as of now are unable to do repairs on these. Please help if anybo
Electronics Forum | Wed Jan 22 15:50:23 EST 2003 | davef
Some people run underfill through their reflow oven set with a normal recipe, but at breakneck speed. We think that might not produce the cure that we'd like to obtain. We'd don't use our reflow oven because we don't want to given-up the time to
Electronics Forum | Wed Jan 22 16:37:17 EST 2003 | smsinc
Nitrogen generators are becoming more popular than ever recently. They are being used for companies involved in food preparation, laser cutting and the electronics market to name a few. Purity, flow rates and pressure determine the system cost and va
Electronics Forum | Thu Feb 27 13:50:55 EST 2003 | Matt Kehoe
We use an Aqueous Technologies Millennium III closed loop system. The footprint is no more than 12-13 feet. We wash water soluble solder paste residue with excellent results however, due to the nature of our solid solder deposit process, we are washi
Electronics Forum | Mon Mar 03 11:23:04 EST 2003 | MA/NY DDave
Hi If you don't know what these puppies are, HAVE the customer specify them. You will be MUCH Safer in the long run since if you choose the wrong value they will COME Back at YOU. He might even need a network of .1 .01 Piles of places to read; Bo
