Electronics Forum | Fri Feb 27 14:27:54 EST 1998 | David Spilker
| What is the proven industry solder attachment process for installing 240 lead (gull wing) quad flat packages with lead pitch
Electronics Forum | Fri Feb 13 12:56:23 EST 1998 | Scott Cook
| What is the proven industry solder attachment process for installing 240 lead (gull wing) quad flat packages with lead pitch
Electronics Forum | Wed Nov 11 09:00:04 EST 1998 | To Steve Herring
Steve, The PD isn't the problem. The QFP240's place fine. It is just that dont pick from cavities 10, 12, 13, and 15. When the sub-robot picks from the other cavities, they place fine. The robot comes down over the above listed cavities, but does
Electronics Forum | Tue Nov 10 12:06:59 EST 1998 | Steve Herring
Larry, We place QFP240's all the time with our 2 IP-3's. If you provide your e-mail or fax number, I can send you the PD that we use for our QFP's. Steve | Here is a good one for ya. Our IP3's MTU will not pick QFP240's out of cavities, 10, 12,
Electronics Forum | Thu Aug 18 17:00:26 EDT 2005 | MM
We recently had some boards returned that have me stumped. Word was QFP pins were coming out of the solder in the field. Upon inspection it was true!! If you press gently on the pins they SLIDE out of the joint. The joints look good, shiny ect but it
Electronics Forum | Sun May 16 20:47:25 EDT 2010 | aungthura
Thanks Dave I tried various sockts but all were failed.At SnPb profile,maximum- 230'c~240'c, the solder at sockets' pins not melted.Increasing to 250'C, the sockts were deformed.
Electronics Forum | Wed Nov 21 19:45:36 EST 2001 | Yngwie
Hi Guys, I need help. I�ve a trouble with non-wetting problem on the lead of 208 pin, 20 mils pitch QFP. We are on intrusive reflow. I never faced this problem before on this product after running them for about 2 years now. This occurred on one pa
Electronics Forum | Wed May 17 03:56:20 EDT 2000 | Wolfgang Busko
Avichai: What kind of PCB are you using, when do you detect that shift (right after placement, before reflow, after reflow), does the shift always appear to be the same or do you see a variation, are you able to identify the process-step where it hap
Electronics Forum | Wed May 17 12:22:54 EDT 2000 | JAX
Ramot, Without further explanation everyone here is just taking stabs at it..... Sounds normal, I'm game! Have you looked at board finish(HASL?)?? Measured paste height?? Are they always off in the same direction? If not, Handling?? What are the sp
Electronics Forum | Thu May 29 13:10:25 EDT 2008 | slthomas
You get no argument from me, but we had a prototype come through a few weeks ago with a QFP240, a couple hundred 0603s, and a half dozen or so small .020" pitch parts with no fids at all. We asked if the omission was an oversite but he'd never heard
