Electronics Forum | Thu Nov 07 06:10:13 EST 2002 | stefwitt
I used once flux cream on a glass plate for a customer application, which should simulate almost the same cohesion than solder paste.
Electronics Forum | Mon Dec 02 18:01:12 EST 2002 | GSW
Hi, Try to check if there is water absorbed in the flux or the humidity around the wave area. possibly plating on barrels that might be damaged?
Electronics Forum | Tue Dec 03 15:26:07 EST 2002 | GSW
This might be a trival mundane suggestion but try to use non conductive plate to hold components. Probably even made of the pallet material. I am sure your pallet fabricator will have tons of scrap and he can help you find one. T
Electronics Forum | Tue Dec 10 22:18:32 EST 2002 | davef
Randy's correct. If you were soldering to nickel with WS609, you would be complaining about non-wetting, not lumpy solder flow.
Electronics Forum | Wed Dec 11 09:41:26 EST 2002 | davef
I'd guess that you need to sit at your current 216-218*C peak for that 5 to 10 seconds that I mentioned earlier. Increasing your peak is the easiest way to do that, as you say.
Electronics Forum | Sat Dec 21 02:06:22 EST 2002 | P.SANKARA NARAYANAN
The easiest simplest solution i can think of is the Print plate from OKI. Why dont you try the same. Visit http://www.metcal.com. Instead of printing on PCB you can print on the BGA.
Electronics Forum | Wed Jan 15 19:27:43 EST 2003 | praveen
Grainy finish of the solder joint also caused by higher reflow temp.So far we have observed grainy structure in case of gold plated board.
Electronics Forum | Wed Jan 15 19:27:44 EST 2003 | praveen
Grainy finish of the solder joint also caused by higher reflow temp.So far we have observed grainy structure in case of gold plated board.
Electronics Forum | Thu Jan 16 10:18:53 EST 2003 | burb1999
I have heard that the profiles are pretty much the same but I have a visible solder joint difference... might half to start looking at the plating, might be something with that?
Electronics Forum | Wed Feb 05 19:43:34 EST 2003 | iman
If by the Powers Ta Be (customer/designer), you can't change the PCB design, negotiate for the PCB fab house, to block the via holes with their (green?) solder mask some customers/designers want to have via holes to be present in the PCB pad, due to
