Electronics Forum | Thu Aug 29 20:34:02 EDT 2002 | ppwlee
A gap of 150-200� between potential shadow components is enough to eliminate those problems. Dave, Can you clarify? Do you mean 0.015 to 0.02?? Peter
Electronics Forum | Thu Aug 03 18:35:45 EDT 2006 | russ
So what are your current drying parameters? can you adjust temp and time? is this a batch cleaner that may have some shadowing from the way it is loaded causing hot air to not hit certain boards? Russ
Electronics Forum | Tue May 27 19:32:36 EDT 2008 | mobytahoe
It's all about "exercising" the flux and making sure that what is left over, is benign. When the process is correct, the residue should like like a shadow and present no pooling, lumping, etc.
Electronics Forum | Fri Jun 06 08:38:29 EDT 2008 | davef
Shadowing is a concern in uV coatings and adhesives. Look here: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=52734
Electronics Forum | Tue Aug 19 08:02:26 EDT 2008 | ck_the_flip
Larry, It is generally bad practice to place high profile parts, like TANTalum Capacitors on the bottom side. They are more likely to shadow, and also, the odd termination that covers only a very small part of the body makes it prone to solder skip
Electronics Forum | Wed Aug 20 08:29:13 EDT 2008 | hussman
I guess it depends on the size of the cap. I find that shadowing of other parts is the problem with Tant-caps. Tell the Gurus to stop picking on your Mom.
Electronics Forum | Fri Oct 10 09:34:58 EDT 2008 | dwelch123
We use a Marantz ISpector and as long as you program it correctly, taking into consideration any shadowing from adjacent parts, it does a superb job catching non-solders, head in pillow and insufficients.
Electronics Forum | Mon Oct 20 13:17:05 EDT 2008 | jdumont
No pictures pre-paste. I have noticed on a few occasions a couple of boards that look like they have a slight discoloration on some areas of the board. Kind of like a shadow almost on the gold. Josh
Electronics Forum | Tue Feb 10 22:20:16 EST 2009 | stevek
Looks like an improvement to the spinning stuff, but gads, I wish these people would stop using the term slice. The Teradyne still does not create a slice. It infers things from different sized shadows. It still cannot actually image a slice thoug
Electronics Forum | Mon Dec 14 13:20:56 EST 2009 | stepheniii
Xrays go through aluminum quite well. I've xrayed BGAs with heat sinks that were well over an inch tall and they only made faint shadows. What material is the bottom of the PCB? And how are you going to bond to it?
