Electronics Forum | Thu Jan 03 08:02:53 EST 2002 | davef
Slump is a function of the particular paste you select and the temperature of the paste. Use a slump test like the one that follows to compare fluxes. Slump Test Step Process activity 1 Print paste on white ceramic substrate or microscope sli
Electronics Forum | Wed Jun 01 03:49:30 EDT 2005 | devilhitam
I'am having a problem with 0805 component where right after placement, the component tend to move from the pad. I'am using 'horse shoe' aperture for 0805 component to resolve the solder beading issue. Does this 'horse shoe' contributing the skew/shif
Electronics Forum | Fri Apr 04 01:39:21 EDT 2008 | slthomas
All of what Dave says is spot on. I suspect that the most likely corresponding defects on your assemblies would be poor wetting and insufficient solder.
Electronics Forum | Wed Feb 23 17:24:06 EST 2005 | Austinj
Solder spattering, solder balls, components "popping" off pads........ Not a serious chemical reaction, however, as replied to by KEN on 12/21/04 in a similar article: "Are you adding liquid flux? Or paste "Gel" flux? If liquid flux: This, in my m
Electronics Forum | Wed Apr 14 05:44:36 EDT 2004 | hun
Hi All, Just have a share with you guy. We are using T4 solder paste and also E-Stencil. We ahd try out Alpha, Kester, AIM and Qualitek. The result show Alpha had a very very heavy stack flux and can't get it clean off even by chemical
Electronics Forum | Thu Apr 22 11:46:20 EDT 2004 | rkevin
We used type 4 no clean from Aim too with this application. The price was only about 20 % more than type 3 powder. Works great. They didn't have a long leadtime, my paste was in stock. I have had simalar problems with Indium. They got too big too fas
Electronics Forum | Thu Apr 26 01:42:56 EDT 2007 | Haris
Hi, yes may be 3d is slow but it gives you great results as it shows the height while 2d picture shows error when the paste in your machine appears to end i.e. when it see that the pad starts to appear. I don't know which company brand you prefer but
Electronics Forum | Wed Apr 14 14:51:10 EDT 2010 | jgalarza
After checking some of our stencil data for the correct aspect ratio I found that a few are wrong. I would like to change them from 5mil thk to 4mil thk but do not know how much paste volume I need to keep. We are using 0201,0402, and BGA with 0.80 p
Electronics Forum | Fri Dec 17 14:13:18 EST 2004 | Claude_Couture
I have done this several times in order to save my butt: adding liquid flux in a jar of not so fresh paste, stirring it slow for 2-3 minutes, to make it usable. Of course, use no-clean flux for no clean paste, etc. During one production slow-down,
Electronics Forum | Fri Apr 04 08:49:45 EDT 2008 | ck_the_flip
Define "expired" though... 1 week? 6 weeks? 1 month? 6 months? Unrefrigerated life is generally 30 days. If paste has been stored refrigerated at manufacturer recommended temperatures, what would you guys do, like say, if you owned your own shop
