Electronics Forum | Fri Apr 20 13:23:53 EDT 2007 | stepheniii
I wonder if you could push this to exempt any > board with SnPb paste applied to the entire board > as long as it has fine pitch parts? > hmmmmmmmmmmmmm And would TopLine fine pitch comonents count? ;)
Electronics Forum | Tue Apr 29 07:26:38 EDT 2008 | realchunks
Another area to look is on any breakaway. If they did not add copper to breakaway, it can warp your board if long enough. Seen it happen many times.
Electronics Forum | Thu Aug 05 13:37:28 EDT 2004 | davef
Baking your boards will redue the amount of OSP on the board. If you use the boards quickly, you probably will not have a problem with baking [and don't bake too long]. Why do you want bake this board?
Electronics Forum | Fri Nov 09 10:24:06 EST 2007 | hussman
NOTHING! As long as you don't drip sweat on the boards you're trying to set-up and then re-adjust and re-adjust and re-adjust all day long like you get with Grid-Shlock.
Electronics Forum | Fri Aug 19 08:41:04 EDT 2005 | davef
If these are these bare [or partially assembled] boards, baking probably will not hurt, as long as the bake is not excessive. If these are these assembled boards, baking probably will not accomplish much. What is the source of this water? If it's
Electronics Forum | Sat May 29 16:04:49 EDT 1999 | M Cox
I have always thought it to be a good practice to wash SMA's with water soluble paste (WS609) soon after reflow. Is there a time limit as to how long a board should sit after reflow before washing said board? For instance; processing a double-sided
Electronics Forum | Sat Jan 24 00:13:57 EST 1998 | Scott
| What is the lifetime for a typical solder paste ? | How long can boards be stacked waiting before the paste goes off ? Lifetime and tack time depends on: - Manufacturer - Flux/mixture - Environmental conditions Typical lifetime is dependent on stor
Electronics Forum | Tue Sep 07 11:17:43 EDT 2010 | ysutariya
The only issue is that now you are paying for a 4 layer board and only getting a 2 layer board. In the long run, it will definitely cost you if this is a higher running product. Other than that you shouldn't have any issues.
Electronics Forum | Thu May 05 08:14:45 EDT 2011 | kahrpr
Where black pad exists, it is not a common problem. When I read it is totally random I doubt that. You have defiantly something going on that is unique with the process. It is either your board manufacturer or your solder paste or your profile. It c
Electronics Forum | Fri Jul 22 07:36:18 EDT 2005 | Guest
It's the same like asking wether you get a gold-contaminated solder pot when soldering ENIG boards. As long as the replenishment of dross is large compared to the intake of contaminant, the contamination level will stay within acceptable levels.
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