| Topic: |
Science > Physics |
| User: |
"Boris Mohar" |
| Date: |
15 Jan 2005 06:15:57 PM |
| Object: |
Metal Whiskers |
http://nepp.nasa.gov/whisker/
Regards,
Boris Mohar
Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca
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| User: "" |
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| Title: Re: Metal Whiskers |
15 Jan 2005 09:38:51 PM |
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Boris Mohar <borism_-void-_@sympatico.ca> wrote:
http://nepp.nasa.gov/whisker/
What's your point?
I watched tin and silver whiskers growing under a microscope back in the
late 70s.
Fairly easy to prevent.
--
Jim Pennino
Remove -spam-sux to reply.
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| User: "greywolf42" |
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| Title: Re: Metal Whiskers |
17 Jan 2005 09:21:31 PM |
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<jimp@specsol-spam-sux.com> wrote in message
news:cscnkb$53i$4@mail.specsol.com...
Boris Mohar <borism_-void-_@sympatico.ca> wrote:
http://nepp.nasa.gov/whisker/
What's your point?
I watched tin and silver whiskers growing under a microscope back in the
late 70s.
Fairly easy to prevent.
By adding lead to the solder.
An interesting article in Fortune magazine, January 10, 2005, "Tin Whiskers:
The Next Y2K Problem?". The article claims that lead use has now been
banned in new applications, in the EU and many countries.
--
greywolf42
ubi dubium ibi libertas
{remove planet for return e-mail}
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| User: "" |
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| Title: Re: Metal Whiskers |
17 Jan 2005 09:30:28 PM |
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greywolf42 <mingstb@marssim-ss.com> wrote:
<jimp@specsol-spam-sux.com> wrote in message
news:cscnkb$53i$4@mail.specsol.com...
Boris Mohar <borism_-void-_@sympatico.ca> wrote:
http://nepp.nasa.gov/whisker/
What's your point?
I watched tin and silver whiskers growing under a microscope back in the
late 70s.
Fairly easy to prevent.
By adding lead to the solder.
Not a chance.
<rest snipped>
--
Jim Pennino
Remove -spam-sux to reply.
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| User: "tj Frazir" |
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| Title: Re: Metal Whiskers |
18 Jan 2005 02:22:57 AM |
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Thats why we dip .
Its corsion in a magnetic field .
de humidifiers is how its prevented in a ship.
set one TV in a damp cold place and one in a warm dry place . You can
grow more then wiskers in the wet place.
another method is bakelite and plugs that eliminate gaps.
I run a wireless ship . A supperconducting tape has a line for evry
relay on the ship at the servobridge.
The main power is a buss duct and a relay plugs into it and turns
lights on and off .
evry valve can be quickchanged and is servo relay operated from the
servobridge.
Change inlet water 12 times via hand or servo.
Instead of wire in a house you would have a buss duct . Evry room
would have its own breaker and the breaker via servo can be turned on
or off from any room. The supperconducting tape turns the relays on and
off and are 100 lines on a 1/2 inch tape.
The tape wount corode and wount burn .
it handles 16 volts but will take 220 without burning as to start a
fire.
The buss duct is saf t bar.
It saved 1000 miles of wire.
It reduced the chance of fire 80 %.
It made things easyer to work on.
It might change the way its done.
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| User: "Boris Mohar" |
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| Title: Re: Metal Whiskers |
16 Jan 2005 07:43:32 AM |
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On Sun, 16 Jan 2005 03:38:51 +0000 (UTC), wrote:
Boris Mohar <borism_-void-_@sympatico.ca> wrote:
http://nepp.nasa.gov/whisker/
What's your point?
I thought that the subject is interesting. What is the physics behind this?
Can it be controlled and used?
--
Boris Mohar
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| User: "" |
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| Title: Re: Metal Whiskers |
16 Jan 2005 10:17:24 AM |
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Boris Mohar <borism_-void-_@sympatico.ca> wrote:
On Sun, 16 Jan 2005 03:38:51 +0000 (UTC), wrote:
Boris Mohar <borism_-void-_@sympatico.ca> wrote:
http://nepp.nasa.gov/whisker/
What's your point?
I thought that the subject is interesting. What is the physics behind this?
Can it be controlled and used?
--
Boris Mohar
As I recall (this was about 25 years ago) it is an electrochemistry
effect; I got out of the IC business in 86.
It, at the time, was a plague upon portions of the IC industry.
A google search for silver migration or tin migration should yield current
information.
I've never heard of a usefull application of the effect, but who knows.
--
Jim Pennino
Remove -spam-sux to reply.
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