Electronics Forum | Fri Aug 02 04:22:02 EDT 2013 | mbb
Thanks, it could be a good feature to implement inside the refrigerator. Have you any idea about suppliers of customized refrigetor?
Electronics Forum | Tue Feb 14 14:26:13 EST 2006 | Chunks
Well, you don't want your paste to spoil! It'll give it a bad aftertaste. Actually, we refrig our paste mainly cause our stock room gets rather on the toasty side. Jars left un-friged will cause the metals to sink and leave a puddle of flux on top
Electronics Forum | Thu May 24 08:55:25 EDT 2007 | ck_the_flip
Here's some quick things to look for: 1. Does your solder paste feel like concrete, does it roll-up into your squeegee blades, and stick to your stencil? If so, your problem is the solder paste. The mixture of powder and flux, or metal load is ou
Electronics Forum | Thu Sep 02 08:57:29 EDT 1999 | Scott
I am using a 18 mil and below water soluble solder paste (89.5-25-80). I have never used this type of paste. The PCB has a fine pitch component of which I cannot prevent bridging. The paste coverage on the pad looks like it is slumping. It is not a n
Electronics Forum | Sat Apr 25 19:17:36 EDT 2009 | newtfly
Emilio, I have a fishbone diagram that I can e-mail to you that shows the MANY variables in the paste print process. There is only one way to determine for certain that the printer is doing it's job, and that is with a true 3D paste inspection proc
Electronics Forum | Fri Jun 25 12:07:00 EDT 1999 | John Thorup
| | hello, | | | | has anyone tried dispensing solder paste in thru holes instead of waving or hand soldering. if so how did it work out for you. | | thanks for the input | | | | wayne | | | | | | | We have tried this mainly on thru hole connect
Electronics Forum | Sat Feb 19 09:26:19 EST 2005 | davef
Your customer asks a reasonable question. How do you know that your: * Paste has not dried? * Stencil aperatures have not become clogged? * On and on ... Some agrue that printing is the most critical process and that it drives all down-stream failu
Electronics Forum | Thu Jun 01 21:19:52 EDT 2006 | ec
Hi Russ, Thanks for your input. Currently, our stencil is at 5 mil thickness and the paste height from 5.5 to 6.5mil. I have increase the paste height to 7 to 7.5 mil and great improve....... I just need some data to present to my management and tel
Electronics Forum | Tue Jan 16 10:19:36 EST 2007 | slthomas
Then how do we explain the poor printing performance (appears to be rheology based, paste thickening/drying, poor aperture fill, sticking to the blades, etc.) of paste that has exceeded it's shelf life? You know, the stuff that no amount of stirring
Electronics Forum | Tue Jan 16 15:42:45 EST 2007 | slthomas
Now yer talkin'! FTR, I've seen 7 month old (5 month shelf life in a 45� F fridge) WS based pastes in tubes turn to clay and refuse to print through anything less than about 50 mil pitch. This was stuff stored in the fridge per mfr's spec. I suspe
