Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the latest
piece on the subject of lead-free electronics, which I received from one of
my suppliers a few days back. The last paragraph is particularly
interesting.

Arfa

On 23 Apr, 09:31, "Arfa Daily" wrote:

Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the latest
piece on the subject of lead-free electronics, which I received from one of
my suppliers a few days back. The last paragraph is particularly
interesting.

Arfa

link?


NT

Arfa Daily wrote:

Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the latest
piece on the subject of lead-free electronics, which I received from one of
my suppliers a few days back. The last paragraph is particularly
interesting.

Do go on !

Graham

Eeyore wrote in message
...


Arfa Daily wrote:

Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the
latest
piece on the subject of lead-free electronics, which I received from one
of
my suppliers a few days back. The last paragraph is particularly
interesting.

Do go on !

Graham


Its a modern form of lemon juice invisible ink. He used the electrons from a
lemon+Zn+Cu.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

wrote in message
oups.com...
On 23 Apr, 09:31, "Arfa Daily" wrote:

Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the
latest
piece on the subject of lead-free electronics, which I received from one
of
my suppliers a few days back. The last paragraph is particularly
interesting.

Arfa

link?


NT


Oooops, sorry .... :-\

http://uk.farnell.com/jsp/bespoke/be...n_whiskers.jsp

Arfa Daily wrote in message
...

wrote in message
oups.com...
On 23 Apr, 09:31, "Arfa Daily" wrote:

Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the
latest
piece on the subject of lead-free electronics, which I received from
one
of
my suppliers a few days back. The last paragraph is particularly
interesting.

Arfa

link?


NT


Oooops, sorry .... :-\


http://uk.farnell.com/jsp/bespoke/be...xt&CMP=NLC-Fin
dings&bespokepage=farnell/en/ed_world/news/latest_news/2006/tin_whiskers.jsp



similarly
Does anyone know the reason for silver migration around the edges of ceramic
resonators or the thin element of ceramic filters?. Going ohmic across the
faces so operational failure.

Arfa Daily wrote:

wrote
"Arfa Daily" wrote:

Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the
latest piece on the subject of lead-free electronics, which I received from one
of my suppliers a few days back. The last paragraph is particularly
interesting.

Arfa

link?


Oooops, sorry .... :-\

http://uk.farnell.com/jsp/bespoke/be...n_whiskers.jsp

You hadn't previously heard of tin whiskers ? It's why Swatch asked for a total exemption from the ban on lead in solder.

Graham

Arfa Daily wrote:
wrote in message
oups.com...
On 23 Apr, 09:31, "Arfa Daily" wrote:

Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the
latest
piece on the subject of lead-free electronics, which I received from one
of
my suppliers a few days back. The last paragraph is particularly
interesting.

Arfa
link?


NT


Oooops, sorry .... :-\

http://uk.farnell.com/jsp/bespoke/be...n_whiskers.jsp


Interesting article....

"Eeyore" wrote in message
...


Arfa Daily wrote:

wrote
"Arfa Daily" wrote:

Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the
latest piece on the subject of lead-free electronics, which I received
from one
of my suppliers a few days back. The last paragraph is particularly
interesting.

Arfa

link?


Oooops, sorry .... :-\

http://uk.farnell.com/jsp/bespoke/be...n_whiskers.jsp

You hadn't previously heard of tin whiskers ? It's why Swatch asked for a
total exemption from the ban on lead in solder.

Graham

Yes, of course I had heard of tin whiskers. I just thought that it was
interesting to see the latest mutterings about the subject, gathered
together in one place, and with particular reference to the surface plating
of the leadouts on electronic components. I dare say that many others
reading on here have not heard of them, so again, another reason to post the
link ...

I also felt that the findings that lead had a beneficial effect in
preventing the growth of these, was particularly relevant, now that it has
been largely banned from solder, except in the cases of equipment which is
responsible for human safety, such as avionics, medical instrumentation, and
to a debateable degree, military.

Arfa

N Cook wrote:

Arfa Daily wrote in message
...

wrote in message
oups.com...
On 23 Apr, 09:31, "Arfa Daily" wrote:

Hi all

Following on from earlier discussions regarding the replacement of
traditional solder with lead-free alternatives, here is a link to the
latest
piece on the subject of lead-free electronics, which I received from
one
of
my suppliers a few days back. The last paragraph is particularly
interesting.

Arfa

link?


NT


Oooops, sorry .... :-\



http://uk.farnell.com/jsp/bespoke/be...xt&CMP=NLC-Fin

dings&bespokepage=farnell/en/ed_world/news/latest_news/2006/tin_whiskers.jsp



similarly
Does anyone know the reason for silver migration around the edges of
ceramic resonators or the thin element of ceramic filters?. Going ohmic
across the faces so operational failure.


I seem to remember reading something about that in "Physical Design of
Electronic Systems" (which comes in about 6 volumes, by published by Bell
Telephone).

I think that the silver migration is affected by the presence of DC voltages
and maybe humidity etc., whereas nobody knows how to accelerate tin whisker
growth, (so we'll have to wait X years before we find out that everything
produced in the last X years is going to fail.....)

Chris