Electronics Forum | Wed Dec 14 07:38:56 EST 2005 | tk380514
the original question was: Please give me some guidelines on designing Stencils for Fine Pitch. which i did however, 40% fallout for solder shorts this could be caused by many other processes having gone wrong before, i.e. type of solder paste
Electronics Forum | Wed Dec 21 14:36:58 EST 2005 | Cmiller
To try to address the original question, the smocks we use have a pretty healthy wrist band on them that grounds them to your skin. You still need to wear heel straps to ground your body to the floor. Some smocks do not have the wrist bands and those
Electronics Forum | Wed Jan 11 10:29:34 EST 2006 | chunks
Wow, you got off easy. He made a smock suggestion for ESD and next thing ya know we all had these stupid things that didn't fit right, get in the way and became a major pain in the arse (not to mention the people that never wash them. Stains are no
Electronics Forum | Mon Feb 13 10:33:57 EST 2006 | fredericksr
Hello, I am automating a process on our floor from wire solder hand application to dispensed paste and reflow. The process involves "lidding" a shielding lid around our assemblies for microwave quieting. The result is non-hermetic. For cosmet
Electronics Forum | Fri Feb 24 13:39:35 EST 2006 | Chunks
I agree with Jerry. A 7 mil stencil should work just fine for 25 mil pitch parts and 0.050 pitch BGA's. I too go 6 mil, but whith proper screen printing, you can 7 mil. You can always do 5 ot 10% reductions if needed. Use the homeplate design on
Electronics Forum | Thu Mar 09 12:09:19 EST 2006 | fastek
I assumed a conservative 25,000 cph for each of the chipshooters...whether it's an MV2F, CP-6, CP-642 etc. You're not going to get 50,000 cph out of (1) CP-643. You might for short periods but not in the long run. It would be suicide to rely on one
Electronics Forum | Mon Apr 24 20:02:38 EDT 2006 | evsint
Why don't you guys look at the "WORLD LEADERS IN SOLDER RECOVERY". EVS International make the EVS 3000 and EVS 6000 Solder Recovery Systems. Many other companies have tried to come up with different ways of recovering solder but the EVS is the best
Electronics Forum | Mon Apr 17 22:54:51 EDT 2006 | Darby
Short answer is - not really. According to the manual in Chapter 1-5 Supply devices (Feeders) overview "There are also available an 8mm tape feeder which handles 1005(0402) square chips". I have never seen one. The problem is that even an H nozzle is
Electronics Forum | Wed May 10 00:27:46 EDT 2006 | Chris
Russ, By a longer profile you mean a more even slope across the entire profile. Unfortunately I only have a 5 zone oven that is fairly short. How many heated zones are you using? Did you shrink the 0402 pad design and leave less pad exposed out a
Electronics Forum | Wed May 10 13:03:50 EDT 2006 | PWH
It sounds like your depaneling method is good. The only thing left to look at is to see if the depaneler is hitting the part somehow from the cutter or the bottom plates. I've seen time and time again where an operator has a part in contact with th
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