Electronics Forum | Thu Sep 19 21:23:42 EDT 2002 | davef
I'm not saying that an eraser will necessarily work. What I'm saying is that some erasers may cause more trouble than the eliminate. Look here http://aic.stanford.edu/jaic/articles/jaic28-02-003_2.html We prefer a brand called Ruby Red. The "ole
Electronics Forum | Thu Apr 03 09:48:31 EST 2003 | davef
R1: Contacting Altera to find out if the BGA pads are gold. D1: Bet money the pads were ENIG. R2: Contacting Altera to find out if they use abrasives. D2: If abrasives were the problem, you�d see it in many pads, especially those close to the probl
Electronics Forum | Tue Jul 30 08:37:39 EDT 2002 | davef
When you talk about 'poor wetting', 'dewett', 'no wets', etc.; are you seeing solder pulling back or away from the pad? Please describe the condition. Dewetting. The condition in the solder joint in which the liquid solder has not adhered intimate
Electronics Forum | Fri Nov 01 09:46:25 EST 2002 | caldon
Lead Links- Only a small amount of lead can be absorbed through the skin, but nonetheless can be. Any cuts, abrasions raise the risk significantly. Also remember lead can be present on the skin and ingested, again a high degree of concern. From these
Electronics Forum | Sat Apr 12 09:47:07 EDT 2003 | davef
... continuing with Q2: How do you remove and replace? A2: Belt sander, sand blasting, grinding wheel, etc. Parylene/Paraxylyene is a great coating and can be selectively removed by several methods. The IPC-7711 (Rework of Electronic Assemblies)
Electronics Forum | Mon Apr 12 10:59:49 EDT 2004 | Takfire
Hello. I have a customer that continues to have problems with their bulk cassette feeder. The customer is complaining about shorted parts that result from bulk cassette feeding operations. They are quick to claim that the failure is related to the
Electronics Forum | Fri Jun 03 16:35:40 EDT 2005 | davef
We've never tried to remove Paraylene from a BGA, but we stayed [in seperate rooms] at the Red Roof Inn. Parylene/Paraxylyene is a great coating and can be selectively removed by several methods. IPC-7711 (Rework of Electronic Assemblies) has a sect
Electronics Forum | Mon Apr 17 22:52:02 EDT 2006 | daxman
Okay, we got the machine back together about 2 weeks ago, cleaned the clutches and measured the placement accuracy. We are back up 100%, and have not seen any stn 17 & stn 19 nozzle errors. Thanks guys!! 19 of the 20 clutches are really tight; they
Electronics Forum | Tue Jun 26 20:51:44 EDT 2007 | davef
You're correct. In the metal working industry, it's common to discuss swarf. For instance: Swarf is a mixture of small metal particles, cooling fluids, lubricants, and residuals from grinding media such as abrasive belts or stone wheels. Swarf is ty
Electronics Forum | Fri May 11 14:54:38 EDT 2012 | stentech
I am not aware of the Nano protek flaking off. However I do believe it can wear off through abrasion. Unforunately there is no red light goes off when it has worn unless you have good paste inspection. Even when it wears it will not take you to a neg
