Electronics Forum | Wed Mar 14 19:32:04 EDT 2012 | swag
You're not clear if you intend to reclaim and re-use the paste from the stencil or not. If not, then you should go to cartridges with an air gun or modify a caulking gun for dispensing paste from cartridges. The paste will last a long time.
Electronics Forum | Wed Mar 14 16:10:38 EDT 2012 | cobham1
We need to develop a method of putting solder paste on a stencil then putting the unused part back into the refrig. Reason we are thinking of this method is because we only run circuit boards twice a week. I dont want to waste entire jar of paste bec
Electronics Forum | Fri Nov 11 04:40:18 EST 2005 | pavel_murtishev
Good day, First of all used solder paste should be placed in special container. It should be kept separately from �fresh� solder paste from the same jar. Limit paste usage period after opening the jar according to manufacturer�s specification. When
Electronics Forum | Mon Aug 31 11:06:20 EDT 2009 | cyber_wolf
How do you make the decision "when to throw it out ?"
Electronics Forum | Mon Aug 31 11:27:23 EDT 2009 | davef
Señor Tech: While you're waiting for others to reply, search the fine SMTnet Archives to find threads like: http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=54268
Electronics Forum | Fri Nov 11 05:07:27 EST 2005 | pavel_murtishev
P.S. If you�ll have further questions you can write e-mail to me on Russian Language. I suspect that you know it :)
Electronics Forum | Thu Nov 10 14:58:16 EST 2005 | Karkanov
Hi, I had a question from our ISO guy asking me how I know that the paste we use is in good condition? The problem is that he saw our operator put some old paste back in a empty jar to reuse it the next day. So his question is how do you know the
Electronics Forum | Mon Oct 15 08:24:24 EDT 2012 | scottp
You could pay the extra to have the microvias plated shut and planarized. If your voids are larger than 25% of the BGA joint area then I would suspect a solderability problem. Either the board plating or a solder paste problem. If they're less tha
Electronics Forum | Thu Dec 10 12:57:25 EST 2009 | scottp
We've used mostly cartridges for many years and I only saw separation once when a particular paste supplier had a problem. With cartridges it's just thaw and use - no mixing. We have some sites that use jars along with mixers and I've never been co
Electronics Forum | Wed Jul 27 09:58:05 EDT 2011 | davef
Pressure printing systems Conventional stencil printing techniques have fundamental limitations as regards paste handling: The volume of paste available for printing is limited, so frequent replenishment is necessary Paste is difficult to c
