Printed Circuit Board Assembly & PCB Design Forum
SMT electronics assembly manufacturing forum.
Views: 9927
we have solderability problem(some pins aren`t soldered) wit...
- Aug 26, 2008
by
omid
Hi Omid,
Before tweaking the profile, it's a good idea to...
- Aug 27, 2008
by
Vlad
Hi,
also you can check the board design. If always the sm...
- Aug 27, 2008
by
emil
nothing relates to ROHS components and tin lead process?
...
- Aug 27, 2008
by
omid
Soory, but I don't understand what you are saying/asking. Pa...
- Aug 27, 2008
by
Vlad
i mean that the parts that we have here is ROHS compliant(pb...
- Aug 27, 2008
by
omid
I've been there. Soldering no lead parts in a leaded world ...
- Aug 28, 2008
by
Real Chunks
Well, as I've said before, it's much better to figure out wh...
- Aug 28, 2008
by
Vlad
> I've been there. Soldering no lead parts in a
> l...
- Aug 28, 2008
by
omid
how can i be sure that the device isn`t affected by moisture...
- Aug 28, 2008
by
omid
That is why you need to do analysis of the failed components...
- Aug 28, 2008
by
Vlad
Vlad,
Where might one do this analysis???
...
- Aug 28, 2008
by
garyr
We do it on a regular base. You can check out the website b...
- Aug 28, 2008
by
Vlad
So just send a board to your company and that's root cause a...
- Aug 28, 2008
by
Real Chunks
i read in smt soldering handbook that by placing the device
...
- Aug 29, 2008
by
omid
Omid,
Try changing your profile. I had the exact same thi...
- Aug 29, 2008
by
Real Chunks
Omid
It depends. Follow the guidelines of ANSI/J-STD-033, S...
- Aug 29, 2008
by
davef
Everyone has been playing a guess game so far :-) but we don...
- Aug 29, 2008
by
Vlad
we are doing many experiment on this problem
1)sn63 pb37 so...
- Aug 30, 2008
by
omid
All that they are telling is important (variants in the proc...
- Aug 31, 2008
by
Allan
we use another device with the same package but it doesn`t h...
- Sep 01, 2008
by
omid
I told a friend this problem, and he also thinks the problem...
- Sep 01, 2008
by
Allan
I would do just that (and eventually will), but I've been ju...
- Sep 01, 2008
by
Vlad
That could lead to oxidation of the leads and worsen soldera...
- Sep 02, 2008
by
Stephen
> That could lead to oxidation of the leads and
> wo...
- Sep 03, 2008
by
omid
I've seen where a new person comes on with some strange prob...
- Sep 03, 2008
by
Stephen
Wow, what a bender. too many Miller Lites! Anyway, Vlad is...
- Sep 03, 2008
by
WaveMasterLarry
Omid,
In some cases we have been able to restore accept...
- Sep 03, 2008
by
glennr
No, I don't work for Suntech (me company name is different b...
- Sep 03, 2008
by
Vlad
I happen to agree with Vlad and I'm not in the same business...
- Sep 04, 2008
by
ScottE
In the REAL world most people don't have time to send out pr...
- Sep 04, 2008
by
Real Chunks
You are right. That is what process engineers are for. HOWEV...
- Sep 04, 2008
by
Vlad
...
- Sep 04, 2008
by
WaveMasterLarry
This is fine from a quality engineers point of veiw, but as ...
- Sep 04, 2008
by
Real Chunks
Well, it depends on what kind of evidence you'd have.
I dea...
- Sep 04, 2008
by
Vlad
Well, I've never "set it up" (wasn't sure whether it would b...
- Sep 05, 2008
by
Vlad
Hi Greg,
It's an interesting scenario, but not even close...
- Sep 07, 2008
by
Vlad
Hey Greg,
Do you still want to see the answer? :-)
Vla...
- Sep 09, 2008
by
Vlad
yes please
...
- Sep 09, 2008
by
BLT Circuit Services Ltd
OK. Here it goes. It's a series images taken after cross-sec...
- Sep 09, 2008
by
Vlad
It's never been there and it wasn't supposed to be there, as...
- Sep 10, 2008
by
Vlad
Well, it wasn't as easy to figure out the root cause. The la...
- Sep 10, 2008
by
Vlad
Root cause analysis is simply looking for what caused a prob...
- Sep 10, 2008
by
Stephen
VERY TRUE, well said
Cheers
Greg
...
- Sep 10, 2008
by
BLT Circuit Services Ltd
No, we didn't do the test you mentioned, but did EDS on the ...
- Sep 10, 2008
by
Vlad
Why just a half, I'd be glad to send a whole one. Just let m...
- Sep 10, 2008
by
Vlad