Electronics Forum | Wed Jul 03 22:35:02 EDT 2002 | Stephen
If you can solder in an inert atmosphere you'll find the problem will disappear, even blowing N2 over the surface while soldering will solve the problem. 10�C over peak is not excessive, I've run up to 350�C in some cases, protected by N2 the flux wi
Electronics Forum | Mon Jul 01 21:35:45 EDT 2002 | jersbo
Would rather have lower humidity and strict ESD rules in place.. than a high humidity condition anyday.. High humidity- 45RH + Paste depending on what you use may become an issue.. Components are sensitive... ever get that vacuum sealed bag you dont
Electronics Forum | Wed Jul 03 15:44:30 EDT 2002 | mantis
If the designer has used pin one as origin surely all parts on the board would have pin one as orign and all parts would be off be same amonunt.If u like you can send a copy of your PD and i would be happy to review it for you and see if theres anyth
Electronics Forum | Wed Jun 19 22:03:23 EDT 2002 | davef
If you can assemble flawless products with these boards, do not be concerned about post-assembly quality issues. There is no current related specification in the US. Although, there may be some old military specifications that apply, but you would
Electronics Forum | Thu Jun 20 03:29:56 EDT 2002 | Josef
I would like to ask you for help. We use mixed technology and we need to protect SMT components in double Wave. Currently we use the carrier for protection of this component. In this case this procces is not possible to use it due to gap between SMT
Electronics Forum | Mon Jun 24 19:38:52 EDT 2002 | russ
I sure hope you don't need any of those!! otherwise I don't know what I or probably most of the people reading this forum have been doing for the last 5 years. We are using a 4 zone oven (wish I had an 8 zone) and have great success putting these do
Electronics Forum | Tue Jun 25 07:12:46 EDT 2002 | Daan Terstegge
Because BGA's are so hard to rework, you'll want the maximum process window for your reflow equipment, and this includes an inert atmosphere. But as long as solderability and temperature profile are well controlled you can have perfect results with a
Electronics Forum | Wed Jun 26 12:21:30 EDT 2002 | dason_c
You can check with Alpha. ie Alpha had 3 different grade of the 63/37 bar, Vaculoy, Vaculoy SMG and HiFlo. You can consult with them and see which one fit for your current supplier. http://www.alphametals.com/products/solder_barwire/index.html Go
Electronics Forum | Thu Jun 27 21:28:42 EDT 2002 | davef
You're correct that the Ni/Pd termination seems to have something to do with you solder balling. It could be related to the interaction between your paste and the Pd. I assume these are really 'fines' rather than 'balls'. Things that come to mind a
Electronics Forum | Tue Jul 02 16:04:08 EDT 2002 | russ
We normally disregard what the "tech" sheets say. A lot of it has to do with your printer settings, prints per hour, placement time, stencil cleaning procedures etc... Just another wrench to throw in, We have noticed lot to lot paste differences al
