Re: repairing broken traces on a PCB

On Fri, 24 Feb 2006 23:08:02 +0100, "Frank Bemelman"
<f.bemelmanq@xxxxxxxxxxxxxxxxx> wrote:


Well, I have a board here worth $100 perhaps, that certainly passed
all tests, but fails now. When I bend it, it works. I should add, that
after bending it ~15 times it stayed in failure mode. I found one
decoupling cap standing in the air, some flux rubbish (?) between a few
legs of a TQFP, but nothing that causes the failure. Ditched it
already.

I wonder what the dropout percentage is for tested boards, and if
it is worth paying for. Difficult to anwer of course, I simply have
excellent experience with untested boards, even with 7mil tracks/distance.
Seems that more goes wrong with the assembly of parts, imo

---
Yes, and I think a lot of it can be attributed to the "need" for
lead free solder that the european community has, so far,
successfully foisted on the rest of the world.

IMO, you can thank higher solder melt temperatures, brittle solder
joints, and poorly understood metallurgy for the reason you had to
throw away $100.


--
John Fields
Professional Circuit Designer
.