Electronics Forum | Fri Jun 28 16:21:03 EDT 2002 | russ
Is that 5 top and 5 bottom zones? We use a 4 zone and a 3/4 zone oven for BGAs and have success. I don't believe that the amount of zones is the issue but what type of profile you can get out of them. I will admit that the large ovens are much eas
Electronics Forum | Thu Jun 27 11:22:03 EDT 2002 | robbied
Hi there. We have had an out of control reflow oven that has allowed its temperature to fluctuate by up to +/- 20 deg C from set point in very short periods of time. We found the root cause of the problem and fixed it, but by then we had already run
Electronics Forum | Mon Jul 08 03:09:12 EDT 2002 | Benny
Hi all How can I find the technical paper or source of information about using No-clean flux with high frequency apllication. High frequency mean more than 2 GHz - 5 GHz. I heard from my colleague that No-clean flux residue on board effect to high
Electronics Forum | Tue Jul 16 21:28:41 EDT 2002 | davef
Questions are: * What is this green material? * What does the green material look like? * What the impact of this material on the long-term reliability of your customer�s product? * What flux did you use to solder these boards? * How were the boards
Electronics Forum | Thu Jul 18 21:04:06 EDT 2002 | davef
So, why can't you clean misprints on Entek boards? Entek: Cheap, flat, OK shelf life, not without process and fabrication issues. Your Entek organic solderability protection is probably Entek Plus [CU106A] made by Ethone OMI. Consider getting a co
Electronics Forum | Mon Jul 29 21:45:13 EDT 2002 | davef
Your board fabricator can tell you how they want you to specify boards that do not have solder on the fiducals on the rails. They probably do not need some BIG stinking drawing change, but can operate from a letter. [And even if you run the change
Electronics Forum | Wed Aug 07 08:43:32 EDT 2002 | davef
Comments on copper plate temperature monitoring are: * Some people use this type of temperature monitoring to start the day as an element of an oven capability measurement and monitoring program. * Using a copper or other metal plate, like aluminum,
Electronics Forum | Wed Aug 07 09:05:11 EDT 2002 | davef
N2 PPM vs %RH? With a firm grasp of the obvious, reflow oven manufacturers rig N2 ovens differently than non-N2 ovens. The N2 displaces O2. Usually N2 oven monitor something or other to give an indication of N2 ppm. %RH really isn't part of the eq
Electronics Forum | Wed Aug 21 02:11:58 EDT 2002 | kenbliss
Hi Joseph It is not clear what you want us to comment on, however I will take a shot. 1. If the boards you are assembling are expensive it may make sense to strive for 50ppm. 2. If the boards are not very expensive, in my experience you would be
Electronics Forum | Fri Sep 13 13:28:58 EDT 2002 | stepheno
I guess no one at ECD reads this forum. They make a clip-on thermocouple prob. Where I used to work we had 3. At first I thought they were very awkward to set up. But once you practise a bit and get used to the right hand thread tightening screw
