Printed Circuit Board Assembly & PCB Design Forum
SMT electronics assembly manufacturing forum.
Views: 8590
We had an order using a 2up PCB (same manufacturer) with sam...
- Apr 14, 2008
by
Mark M.
I dont know if this is related, but there appears to be a bl...
- Apr 14, 2008
by
Sr. Tech
Bottom-side SMT parts CAN and DO go liquidus during the 2nd ...
- Apr 14, 2008
by
Dirk Nuendyke
Contaniminates are always a issue.
What chemicals do you ...
- Apr 15, 2008
by
lellis
If the solder had formed an intermetallic then it couldn't h...
- Apr 15, 2008
by
MfgEng
We find it curious that:
* Heat slug pad for Q19 didn't tak...
- Apr 15, 2008
by
davef
One issue stated incorrectly was that the work order that ha...
- Apr 16, 2008
by
Tony SMT
Do you specify copper weight on your boards? This could be ...
- Apr 16, 2008
by
Hussman
The problem is there wasn't any reflow when the board went t...
- Apr 16, 2008
by
Tony SMT
deleted:
...
- Apr 16, 2008
by
Tony SMT
Per Tony SMT
Here are more photos:
Q15, Q16, Q17 repre...
- Apr 16, 2008
by
Mark M.
What board finish are you using? Is it the same on both boa...
- Apr 16, 2008
by
James
And your screen print looks good?
...
- Apr 16, 2008
by
Real Chunks
Are there any heat sink issues?
Re-version of boards with...
- Apr 16, 2008
by
lellis
This looks like it didn't solder the bottom side completely....
- Apr 16, 2008
by
jdengler
Just a thought: if nothing else makes sense, you might want ...
- Apr 16, 2008
by
Wolfman
[quote]Just a thought: if nothing else makes sense, you migh...
- Apr 16, 2008
by
lellis
I think you are close to the problem when you expect the pcb...
- Apr 16, 2008
by
habsfan
Our quality types wouldn't allow: Q16 on "1up good board2.jp...
- Apr 17, 2008
by
davef
I'd suspect contamination also, possibly from the board supp...
- Apr 17, 2008
by
Robert