Electronics Forum | Wed Dec 15 12:50:39 EST 2010 | hegemon
We evaluated Vapor Phase Reflow in 2010, and in the short time I experienced the machine, I came away with the following. The advantages you are (hopefully)already aware of, such as overall tranfer of heat to the PCB, no chance of temperature oversh
Electronics Forum | Mon Aug 27 10:23:41 EDT 2012 | cobham1
I need to clarify something for everyone. The end customer is the Military. Our customers are military suppliers who do in fact have quality systems in place. When we build the product we end up potting the unit so the customer never looks at the ele
Electronics Forum | Thu Feb 28 10:40:56 EST 2013 | rway
I have been doing this since day one of getting the AOI. It just seemed logical. I don't know what type of AOI you have, but what I have found works best is to use solder inspection to catch parts that are loaded into a no-load location. Move the
Electronics Forum | Wed Sep 16 18:06:14 EDT 2015 | pmcg
Problem with cleaning these machines is once you start it's easy to get carried away. ;) We cleaned our SPA-400F a few months ago, had been offline for a while as we were using our SPA-250. It started as just a clean and to replace all the flux pip
Electronics Forum | Thu Mar 25 20:50:50 EDT 2021 | stephendo
A couple more things. The PCB. What size are the pads? One time a board shop had difficulty putting masking between the pads of a QFP and the pads suffered as a result. When I told them they didn't have to have masking between the pads, the pads w
Electronics Forum | Fri Aug 13 10:00:45 EDT 1999 | Boca
| | Ladies and Gentlemen, | | | | As a newly appointed DFM/CE "guru" here, one of my responsibilities has become repair (of course). As I have some knowledge of BGA repair/rework using semi-automated equipment, it naturally follows I would hav treme
Electronics Forum | Fri Feb 20 12:55:43 EST 2004 | russ
Ah, the old contour wave. I don't really know how to adjust those to get correct backflow to reduce your solder volume. I need to ask why you are worried about this. Do you have a QC requirement in excess of IPC class3 wich allows for this joint t
Electronics Forum | Thu Jul 20 23:41:55 EDT 2017 | heros_electronics
Below is an email that I copy and pasted from my customer's engineer about his concerns with the issue of the chips not reflowing (which is why I was asking about X-ray the chips to make sure they reflowed): Can you let me know your thoughts on his
Electronics Forum | Mon Aug 16 20:19:10 EDT 2004 | Grant
Hi, We have both Vapor Phase ASSCON semi auto as well as Soltec convection inline ovens. I must say we had no end of problems with Vapor Phase. We tried everything, and just could not totally eliminate tomb-stoning completely. We would always get a
Electronics Forum | Tue Jul 27 16:22:17 EDT 1999 | Earl Moon
| I'm working on a prototype board that requires a 600 pin BGA. This is a metal top BGA being placed on a 11" x 17" PCB about .62" thick. | | The part is 1.77" square with a 50 mil pitch and 30 mil bump diameter. The bumps are located on the
