Printed Circuit Board Assembly & PCB Design Forum
SMT electronics assembly manufacturing forum.
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I am seeing poor quality solder joints, mostly on 0402 compo...
- Aug 25, 2008
by
dyoungquist
every time that i have seen that kind of problem
where I w...
- Aug 25, 2008
by
WRONGWAY
Hello,
Maybe you can get closer to a solution by posting ...
- Aug 25, 2008
by
Gary Z.
The problem is occuring on more than one part # of our 0402 ...
- Aug 25, 2008
by
dyoungquist
Here is a post of the current profile.
I have contacted...
- Aug 25, 2008
by
dyoungquist
Well, it's difficult to play with the profile without knowin...
- Aug 27, 2008
by
Vlad
Have you given this information to your paste manufacturer??...
- Aug 27, 2008
by
garyr
Does your paste provider recommend a TAL?
For the leaded ...
- Aug 27, 2008
by
robgd3
Again, our paste manufacturer specifies TAL to be 30-60 seco...
- Aug 27, 2008
by
garyr
Here's a good thread on lead free reflow recipes ...
- Aug 27, 2008
by
davef
You wouldn't think that placement would affect dewetting or ...
- Aug 28, 2008
by
robgd3
Have you tried to run the same process but with diffrent sol...
- Aug 28, 2008
by
janz
You're using a SAC305 chemistry? Double check your liquidus ...
- Aug 28, 2008
by
A Very Frazzled Man
Couple of points:
* We'll tell ya, although it's tough to t...
- Aug 28, 2008
by
davef
Well, as I've said before, a simple cross-section will shed ...
- Aug 28, 2008
by
Vlad
Slow your conveyor down and see what happens. Your profile ...
- Aug 29, 2008
by
Real Chunks
Very interesting problem because it shows how systemic this ...
- Aug 29, 2008
by
Gary Z.
and put a few bucks in your pocket for free.
...
- Aug 29, 2008
by
WaveMasterLarry
small pads like 0402 tend to get hot quite easily. looks lik...
- Sep 02, 2008
by
Wilma
Nope. I'd be happy to do the analysis for free just to prove...
- Sep 03, 2008
by
Vlad
> small pads like 0402 tend to get hot quite
> easil...
- Sep 28, 2008
by
Ron
Sorry it has taken me so long to respond. I got pulled off ...
- Dec 15, 2008
by
dyoungquist