Electronics Forum | Fri Jul 11 10:00:05 EDT 2003 | davef
Component manufacturers recommend limits on the power and period of ultrasonic cleaning. Examples are: * PRECAUTIONS AND GUIDELINES MULTILAYER CERAMIC CAPACITORS: (9) Ultrasonic cleaning time shall be ten minutes maximum. When the power of ultrasoni
Electronics Forum | Mon Jul 21 20:42:12 EDT 2003 | iman
Don, thanks for the thoughtful insight, can I run some thinking points for your further assistance? 1) ours is a Au over Ni PCB bareboard. Do you think excessive Au thickness is any way a influence for poor solder formation? I did notice the PCB ba
Electronics Forum | Thu Oct 02 21:00:26 EDT 2003 | davef
Who says the chlorine comes from your tap water? Our PTOW dumps boat loads of chlorine into our water periodically. Sometimes it's so bad you can smell it. We doubt that it is the source of your problem. This chlorine will volitize very quickly,
Electronics Forum | Wed Apr 21 11:33:20 EDT 2004 | tigerlordgm
As one of our small batch processes, we place BGAs on PCB without using solder paste. We apply tacky flux to a predetermined height on a pallet, "dip" the BGA into the tacky flux to wet the solder balls to the set height, and then use a BGA rework st
Electronics Forum | Tue Jun 08 09:58:12 EDT 2004 | Specious
Have Thoughts on Unfair Trade? If you do, then now is the time to speak up. In another Commerce Department announcement, made May 27, the newly created Unfair Trade Practices Task Force is accepting public comments. Comments should identify unfair t
Electronics Forum | Thu Jul 01 13:47:25 EDT 2004 | Tom B
Good Day! I am looking to purchase a Cyberoptics KS-Flex 18 AOI system, I have a couple of question that if you could answer, I would most appreciative. 1) Model and length of time used. Do they use AOI for all pwbs or just the more complex a
Electronics Forum | Sat Feb 12 20:02:04 EST 2005 | Mike Konrad
As for specific recommendations, I�ll defer to �real users�. But here are the usual suspects: Aqueous Technologies http://www.aqueoustech.com (909) 944-7771 Ultrasonic Smart Sonic http://www.smartsonic.com (818) 610-7900 Ultrasonic PMR http://www
Electronics Forum | Thu Apr 14 13:10:49 EDT 2005 | Shean Dalton
Hi John, A primary consideration is the type of flux you are using. If it's water soluble (organic acid) then cleaning is highly recommended. Any other flux that fails the copper mirror test, we'd strongly recommend cleaning. Passing the copper m
Electronics Forum | Mon Aug 22 10:33:23 EDT 2005 | davef
Q1. What is recommended viscosity standard? A1: There is no standard. ASTM D4040-05 "Standard Test Method for Rheological Properties of Paste Printing and Vehicles by the Falling-Rod Viscometer" is a test method that might work. For more, look her
Electronics Forum | Fri Oct 14 09:58:13 EDT 2005 | patrickbruneel
Here's what I believe is happening. The main difference between the HASL boards and the gold plated boards is that HASL boards are pre-soldered. HASL boards need very little flux activity to get good hole fill and the machine settings have a wide pro
