Electronics Forum | Thu Oct 28 08:26:40 EDT 2004 | curious
What are the defects you see when the stencil is over 50 n/cm? I can't recall ever seeing a (stencil caused) defect that wasn't a dent, ding or some other physical damage, and I would have a very hard time sending back a stencil that is working fine,
Electronics Forum | Tue Oct 26 03:12:36 EDT 2004 | Joseph
Dear all, Recently our production encountered high SOIC failure during testing after reflow soldering. All solder fillets (side/heel) are acceptable as per IPC standard.The reject samples (SOIC)being sent to IC manufacturer to verify the failure. Fin
Electronics Forum | Tue Oct 26 11:01:54 EDT 2004 | Simon UK
DO you have an xray onsite? One suggestion is to check what you can with that machine, i know it wont be able to magnify to 200nm or something, but it will show any ESD damage to the wire bonds or any major cracks of the silicon die. P.s. Most devi
Electronics Forum | Tue Oct 26 22:24:21 EDT 2004 | KEN
More zones = higher thruput. Is it better to have (8) 12 inch zones vs. (7) 15 inch zones? One thought might be more parts = more cost = more potential for failure. I have a bunch of BTU's with over 12,000 heating hours of combined opertion. I
Electronics Forum | Tue Oct 26 13:45:19 EDT 2004 | vinod
Hi friends I am using Alpha Metal WS709 solder paste. I know the spec for this solder paste. It recommends straight ramp to 220 C at 0.9 degree/sec and TAL 75 sec.So I am looking between around 27-220 temp around 215 second. And time above 183 not to
Electronics Forum | Tue Oct 26 13:45:23 EDT 2004 | vinod
Hi friends I am using Alpha Metal WS709 solder paste. I know the spec for this solder paste. It recommends straight ramp to 220 C at 0.9 degree/sec and TAL 75 sec.So I am looking between around 27-220 temp around 215 second. And time above 183 not to
Electronics Forum | Tue Oct 26 17:25:11 EDT 2004 | davef
In every part of the dive, assume the proper position, keep toes pointed always, relax hands but keep pointed, stretch arms, make sure legs are together during takeoff and the dive, hands have to touch the top of the toes in a pike position, moving t
Electronics Forum | Thu Oct 28 05:35:49 EDT 2004 | rlackey
Dave, I think you'll find you'll score higher if you add a cheeky half twist - you'll get a higher difficulty multiplier on your final score. Profiling is highly dependant on the quality of your oven, number of zones, temperature profiling tools et
Electronics Forum | Wed Oct 27 09:39:54 EDT 2004 | loz
Hi all, been recently wave soldering some pcbs with no problems and have now noticed what looks like blue residues on some solder joints. We have been running this product for around six months and this is the first time we have seen this. It is rand
Electronics Forum | Thu Oct 28 20:13:39 EDT 2004 | grayman
The same with Russ, I would look at Vitronics and BTU. based on my experience they give best results especially on the profile. Maintenace is also superb! BTU has modular blower, heater T/C assy. Vitronics is "XPM - NO PM System" Now, BTU offers lif
