Electronics Forum | Tue Nov 28 10:48:29 EST 2017 | georgetruitt
Some things to look into are the component finish, material and composition of the solder, design of the smt stencil, reflow profile or process atmosphere (N2 or air)also contribute to the solder result. The influence of the PCB itself should be co
Electronics Forum | Tue Jul 30 05:26:46 EDT 2019 | ameenullakhan
thanks dave .. I have one more query on the same CCGA. What are the chances of the CCGA lead getting bent or tilt during reflow soldering process. Concern : to achieve the minimum peak temperature of 208 deg C at the connecting leads. On bod
Electronics Forum | Wed Mar 27 19:26:53 EST 2002 | ianchan
After a whole night's self review, I think we can term the slant/tilt as "floating 0805, yet end-terminals have acceptable solder joint formation". the width portion of the 0805 RES/CAP is (floating)elevated from the PCB pad, yet both (width) termin
Electronics Forum | Tue Sep 24 11:10:07 EDT 2002 | Gregg Temkin
I�d appreciate assistance in trying to resolve a placement/soldering problem. My company has designed a board which uses a large number of 0402 LED�s that are .028� high. The LED�s need to be soldered so that they point straight up and are not til
Electronics Forum | Mon Jun 18 18:14:59 EDT 2001 | davef
Would comment extensively on the following? The time is a fact for X-ray inspection. If you set the contrast, tilting angle correctly (provide you did enough cross section to know the few type of failure mode: e.g. smaller balls, shorts, missing on
Electronics Forum | Thu Mar 28 08:27:56 EST 2002 | davef
Don't be concerned. Brian and Neil don't allow us to link directly to email from SMTnet [even though from the way the link changes color you'd think you could. They do this to subjugate the huddling masses and lord the power of cold fusion over us.
Electronics Forum | Wed Jun 23 13:03:01 EDT 2004 | russ
I would ditto CAL, we have a jewel box 90 with the 5 axis and we love it. I really like being able to tilt,rotate,and move side to side front to back, Angle viewing under a BGA can be very informative as to the quality of reflow in seeing ball coll
Electronics Forum | Fri Feb 09 08:07:41 EST 2007 | jax
Has the board been looked at under X-Ray? Have you built more than 1 of the boards in question? Do any of the other boards have the same problem? Have you made any changes to the profile between boards? One side of the BGA collapsing during reflow w
Electronics Forum | Fri Feb 09 16:29:22 EST 2007 | dave
Hi All, Thanks for all the replies. I am placing a 672 Pin BGA. Its the only BGA on the board (Board size 220mmx100mx1.6mm) We build these in batches of 400. So we have built approx 1200 since transition to Leadfree. Latest batch had 7 fails -
Electronics Forum | Fri Mar 23 08:22:35 EDT 2007 | oldsmtdude
I've used standard Nikon for years. We evaluated the Mantis and while first impressions were positive but with continued use EVERYONE chose to move back to the standard eyepiece. A lot depends on what size components you're dealing with - when you s
