Electronics Forum | Fri Apr 09 12:46:10 EDT 1999 | Bob Barr
I have been using an Air-Vac DRS-22 for almost two years with very good results. Once a profile is developed it is very repeatable. The DRS-22 is no longer available, however. It has been replaced by the DRS-24. Unfortunately, the DRS-24 has a lo
Electronics Forum | Tue Apr 20 09:21:40 EDT 2004 | lbiggs
We use 8X10 Ziplock A/S poly bag 4 mil pink at our taping facility. We also sell as a supply. If interested or you would like more information please call Sarah Lewis at V-TEK Inc. 507-387-2039 X 148.
Electronics Forum | Fri Feb 03 09:50:37 EST 2012 | mosborne1
Thanks very much everyone. > > I'll try out a > 5mil and see how that goes. If you are using 6mil stencil and you are saying that you need more on the 0603 parts then you might want to look at your squeege pressure. What kind of squeege blades ar
Electronics Forum | Mon Jan 25 13:56:45 EST 1999 | Parvez Patel
Chang Hong while developing our CSP rework process, we found a temperature spread of about 130C at a distance of approx 150 mils from the component edge. our nozzle had about 20 mils clearance from all sides of the component being reworked. depending
Electronics Forum | Tue Sep 20 10:32:25 EDT 2005 | slthomas
I would say it depends on the process requirements for the board and the reliability requirements as has already been mentioned. If you do two-sided reflow you might allow for fewer rework attempts, for example. If it's a medical device you might on
Electronics Forum | Thu Apr 26 20:18:45 EDT 2007 | hegemon
For what it is worth, we are purchasing a dispensing system including a Robotic Arm, Positive Displacement Valve (as opposed to volumetric displacement) and Controller. We have purchased this unit for doing lead free 20 mil dots at 30 mil pitch in s
Electronics Forum | Fri May 07 20:08:39 EDT 2004 | Ken
...um also, don't forget that ther are planarity issues associated with BGA devices AND bow-and-twist issues with PCB materials. An example I have one BGA device that has a ball planarity of 7 mils!!! Ant that's the OEM specification! THis will re
Electronics Forum | Fri Jul 09 18:36:48 EDT 2010 | rway
We don't use flex pcbs but have the same issue here. Most of our pcbs are HASL finish. I have looked at silver and gold immersion and both look really good under my color camera on my AOI. However, gold is more pricey. There is no additional cost
Electronics Forum | Wed Aug 18 16:26:21 EDT 1999 | Tony
Yesterday as I was creating a profile on a plastic BGA using Conceptronics freedom 2000 rework station, I happend to discover that I was able to remove solder bridging from a plastic BGA. This is what I did. Created a removal profile, I had a board
Electronics Forum | Sat Jun 22 21:06:27 EDT 2002 | jersbo
I agree with PJC.. The mention of 2 QFPs to wave = more than likely rework to remove bridges and a potential to scrap the board, 25mil isnt as bad as 20 or less.. but the potential is still very real.$$$$$$ reflow/reflow is my 2 cents with the possib
