Electronics Forum | Wed Dec 20 09:41:52 EST 2000 | blnorman
Ideally we want to mix the same lot numbers in a repackaged tube. Once again, these are partial tubes that have been thrown away. If the ratio is right to begin with the only change would be due to air exposure. Semco makes a TC seal which, if we
Electronics Forum | Tue Oct 10 04:10:43 EDT 2000 | Tanu
Hi, Jacko is right!BGA ispection equipment like Xrays are extream expensive if you want a good system. There is some xrays that you can have low cost but if you are planning to do superBGA�s or want better image you need atleast 80-100Kv with good r
Electronics Forum | Tue Mar 13 11:50:21 EST 2001 | gsmguru
Here is some general things I usually ask myself when having trouble with BGA's What type of BGA ? Pitch/Bump Dia etc. Smaller bumps sizes & tighter pitches require more attention. This also impacts stencil aperature design & paste selection. Was
Electronics Forum | Fri Mar 23 11:58:01 EST 2001 | mparker
You are mixing long exposed paste back into fresh? How long has your fresh jar been open to the air? You are probably doing yourself a disservice by scavenging the paste (it could have moisture entrapped). Your visocity has definitely changed. You a
Electronics Forum | Mon Jun 11 22:01:30 EDT 2001 | davef
Others make good points. Consider "TP-1115 - Selection & Implementation Strategy for A Low-Residue No-Clean Process" as a starting point. Remember that in-bound components and boards can be loaded with unNC res that can turn the best implemented
Electronics Forum | Tue Jun 26 19:47:02 EDT 2001 | davef
Ya gota stop messing with that NC stuff, bud. The residues will kill you. Look at http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&&Message_ID=4649&_#Message4649 What are you trying to get at when you say "what happens to test
Electronics Forum | Fri Oct 16 14:36:11 EDT 1998 | Jeff Sanchez
| With current soldering of stranded wires to pcb assy's the wire tends to be very brittle and can break with very little movement of the wire. We use a low residue cored wire. Anybody with advice or who has seen a similar problem/knows how to overco
Electronics Forum | Wed Jun 10 21:58:20 EDT 1998 | Dave F
We use them, but we never thought about them. WHAT ARE THEY? The hand lotion we provide for our operators. BACKGROUND: Operators hands take a beating. They 1 Work in a humidity controlled 35 to 50%RH environment that is drying 2 Wash before and
Electronics Forum | Wed Dec 19 02:24:40 EST 2001 | ianchan
Did I mention, we tried to use the same WS flux formulae to brush-cover the affected flex-PCB pads, and subject it to another round of water-wash, followed by oven-baking, and it still doesn't help abit? Oven bake : 100 deg-C, approx 15~30mins (manu
Electronics Forum | Tue May 21 00:24:34 EDT 2002 | ianchan
yngwie, Hi mate, and Holy Crap! what a blooming pile of 7 feet dung you have sitting on your front lawn! ok, we had a customer SQE like that before, fortunately she was promoted from SQE to purchasing officer. and in the name of universal sharing,
.gif)
