Electronics Forum | Wed Nov 21 21:50:50 EST 2001 | Glenn Robertson
Tony, What you are seeing can occasionally be caused by gaps in the plating of the blind vias. If they are not "airtight" you can get moisture coming from the laminate that shows up as voids in the solder balls. You might check on the board sup
Electronics Forum | Fri Nov 30 00:33:37 EST 2001 | jamstart
It will be a 'risk' to rely the volume using cyberoptic as it does not tell you the true volume. With no disrespect to them, they are only using 'mathematical' calculation (LxBxH)to get the volume. As we know that the paste will never be a flat surfa
Electronics Forum | Thu Dec 20 11:09:57 EST 2001 | stevearneson
Also check out the ASC International machine called VisionMaster. This true 3D inspection system has been around for at least 3 years. It provides the highest level of paste measurement in its class. The software is also very easy to operate. The
Electronics Forum | Mon Nov 26 12:00:20 EST 2001 | peterson
Hi everyone, I am looking for a reliable company (preferrably on the west coast) that can make Wave Solder and Press-Fit fixtures for our back-plane division. I need a reliable source that can take our data and produce quality fixtures in a 5-7 day
Electronics Forum | Thu Nov 29 08:16:47 EST 2001 | Hussman
Unless your wave is very, very, very old - you are having your leg pulled. Or someone in your maintenance dept. is a little out of it. Most pre-heaters are already coated to prevent rust. Maybe the coating has flaked away, if so, I'd suggest using
Electronics Forum | Tue Dec 11 20:15:36 EST 2001 | mparker
What happened to good ol' 30 ga. hook up wire? I used to be a whiz with a wire wrap gun. I've even hand soldered wires to a 240 pin QFP (the Engineer was too cheap to buy a $80 socket). Just what are they teaching in these edifices of matriculation
Electronics Forum | Wed Dec 12 17:00:14 EST 2001 | mparker
Aw Dave - you guys are so fashionable, are the dark green and red combos seasonal? caramel brown like a Pale Ale? I once heard that the green was chosen because it gives the best color contrast for white silk screens. As for color reflecting or abs
Electronics Forum | Wed Dec 12 17:36:15 EST 2001 | davef
Caramel is more like a amber ale than a pale ale, although not as redish as the amber. Actually, it's more like caramel. It is real brittle and scratches easily. If we built the board more often, we'd change it to a more familiar material. Naw, n
Electronics Forum | Mon Dec 17 17:30:40 EST 2001 | davef
One of our board fabricators says that carbon inks should be selected based on the process to be used by the assembler. So, their take on this question has some inks that work fine with nc fluxes, others that do not. They suggest: * Determining t
Electronics Forum | Thu Jan 03 06:45:42 EST 2002 | Scott Davies
Hany, Tg is "Glass Transition Temperature". For an informative explanation of what this is, take a look at; http://www.psrc.usm.edu/macrog/tg.htm MLB = Multi Layered Board Does the board which you have the problem with only pass through the wave
