See-through wire mesh to ESD/RFI protect LCD?

[Joerg]

After trying Google, McMaster, and lots of others: Is there a
see-through (thin) mesh that can be fastened to the back of a steel
panel using conductive epoxy around the perimeter? Preferably something
that can't rust.

It is to protect a LCD from getting hit by strong fields or really big
ESD zaps. Currently there is only some kind of poly film 1/10th" away
from the LCD (doesn't touch). It's ok if the translucent properties
aren't top notch since the LCD is back-lit pretty well.

 

[Robert Obermayer]

Hi Joerg,

while i dont know about wire mesh, i do know something that might also
help and would be worth a try: RS 264-9382 is supposed to be fairly
conductive and more or less transparent.
Its very expensive though, probably okay for low volume things but
certainly not something you might want to use on cheap, high volume
devices...

 

[Joerg]

Hi Joerg,

while i dont know about wire mesh, i do know something that might also
help and would be worth a try: RS 264-9382 is supposed to be fairly
conductive and more or less transparent.
Its very expensive though, probably okay for low volume things but
certainly not something you might want to use on cheap, high volume
devices...

Thanks, Robert. Had cancelled right away because it should have gone
into sci.electronics.design instead but I guess cancels don't work well
anymore.

The price would be ok, we have to save an existing (large) base of
units. But this film probably can't be glued on easily from the back.

 

[Robert Obermayer]

Thanks, Robert. Had cancelled right away because it should have gone
into sci.electronics.design instead but I guess cancels don't work well
anymore.

The price would be ok, we have to save an existing (large) base of
units. But this film probably can't be glued on easily from the back.

Id glue it on with a strip of doule-sided film and then use aluminium or
copper tape with conductive glue to get a electrical contact between the
conductive side of the film and the front panel.

Ive seen similar construction on a display unit (probably from a old
cash machine) i found at some trash yard.

 

[Joerg]

Id glue it on with a strip of doule-sided film and then use aluminium or
copper tape with conductive glue to get a electrical contact between the
conductive side of the film and the front panel.

Ive seen similar construction on a display unit (probably from a old
cash machine) i found at some trash yard.

That's a good idea. As long as this stuff survives "baking" in hot
climates without falling off and into the circuit ... bzzzt. These units
will sit in the hot sun all day long.

 

[Joerg]

Lead glass window?

That would be hard to install in a reliable fashion. And the guys in
Brussels would be pelting us ;-)

 

[Jamie]

After trying Google, McMaster, and lots of others: Is there a
see-through (thin) mesh that can be fastened to the back of a steel
panel using conductive epoxy around the perimeter? Preferably something
that can't rust.

It is to protect a LCD from getting hit by strong fields or really big
ESD zaps. Currently there is only some kind of poly film 1/10th" away
from the LCD (doesn't touch). It's ok if the translucent properties
aren't top notch since the LCD is back-lit pretty well.

Lead glass window?

 

[Anthony Fremont]

After trying Google, McMaster, and lots of others: Is there a
see-through (thin) mesh that can be fastened to the back of a steel
panel using conductive epoxy around the perimeter? Preferably
something that can't rust.

It is to protect a LCD from getting hit by strong fields or really big
ESD zaps. Currently there is only some kind of poly film 1/10th" away
from the LCD (doesn't touch). It's ok if the translucent properties
aren't top notch since the LCD is back-lit pretty well.

Something like this?
http://www.twpinc.com/twpinc/control/category/~category_id=TWPCAT_1?gclid=CJvN6p7mlJECFQMQlwodnAGrPg

 

[Jamie]

That would be hard to install in a reliable fashion. And the guys in
Brussels would be pelting us ;-)

http://www.teralab.co.uk/Experiments/Conductive_Glass/Conductive_Glass_Page1.htm


--
"I'd rather have a bottle in front of me than a frontal lobotomy"

"Daily Thought:

SOME PEOPLE ARE LIKE SLINKIES. NOT REALLY GOOD FOR ANYTHING BUT
THEY BRING A SMILE TO YOUR FACE WHEN PUSHED DOWN THE STAIRS.
http://webpages.charter.net/jamie_5"

 

[Joerg]

http://www.teralab.co.uk/Experiments/Conductive_Glass/Conductive_Glass_Page1.htm

Wow, somebody was really determined there. But, quote "Finally, it
starts to smoke." ... We can't quite do that here because there is a
poly surface on the whole thing.

 

[Joerg]

Something like this?
http://www.twpinc.com/twpinc/control/category/~category_id=TWPCAT_1?gclid=CJvN6p7mlJECFQMQlwodnAGrPg

Not that stuff, but this version would work:
http://www.twpinc.com/twpinc/control/product/~category_id=TWPCAT_11/~product_id=050X050T0012W53T

Thanks, Anthony!

 

[Spehro Pefhany]

After trying Google, McMaster, and lots of others: Is there a
see-through (thin) mesh that can be fastened to the back of a steel
panel using conductive epoxy around the perimeter? Preferably something
that can't rust.

It is to protect a LCD from getting hit by strong fields or really big
ESD zaps. Currently there is only some kind of poly film 1/10th" away
from the LCD (doesn't touch). It's ok if the translucent properties
aren't top notch since the LCD is back-lit pretty well.

Joerg- google on "ITO film". Not a mesh.


Best regards,
Spehro Pefhany

 

[Joerg]

Joerg- google on "ITO film". Not a mesh.

It'll might a challenge to mount that onto the back of a steel panel
though. Probably comes with an adhesive but that can stick to the
existing polycarbonate that's already there if someone presses it hard
enough.

Anthony's hint produced this:
http://www.twpinc.com/twpinc/control/product/~category_id=TWPCAT_11/~product_id=050X050T0012W53T

Now I just have to get a sample, find some really good conductive epoxy
that will hold up in tropical climates and we'd be home.

 

[Anthony Fremont]

Now I just have to get a sample, find some really good conductive
epoxy that will hold up in tropical climates and we'd be home.

My favorite 2-part conductive "glue" is made from tin and lead. Can't
recall the name though. ;-)

 

[Lostgallifreyan]

really good conductive epoxy

http://www.ecn.nl/docs/library/report/2002/rx02052.pdf
Might help, anyway, I was looking for something different when I found that.
It describes silver loaded epoxy for connecting fragile solar cells.

And if anyone knows a good thermally conductive epoxy to bond a thin (0.5mm)
layer of copper onto a thick (>3mm) aluminium base with very strong bonding
and very good thermal conductivity, please post. I don't mind if it's
electrically conductive or not, it must be low viscosity though, to form a
very thin strong bond with no voids.

 

[Lostgallifreyan]

My favorite 2-part conductive "glue" is made from tin and lead. Can't
recall the name though. ;-)

I'd use it if it would glue aluminium. Tried HTS2000 but without a flux,
forget it, and the maker doesn't just not specify a flux, they specifically
specify NO flux...

 

[Joerg]

My favorite 2-part conductive "glue" is made from tin and lead. Can't
recall the name though. ;-)

Can't solder or weld here, it's a 3mm steel panel with plastic on the
other side. Which also kind of precludes heat-cure stuff such as Loctite
3880.

 

[Joerg]

http://www.ecn.nl/docs/library/report/2002/rx02052.pdf
Might help, anyway, I was looking for something different when I found that.
It describes silver loaded epoxy for connecting fragile solar cells.

They say "New lamination materials are available that can be processed
at even lower temperatures like 80°C." That's still a bit highish but I
wish they had mentioned some manufacturers.

And if anyone knows a good thermally conductive epoxy to bond a thin (0.5mm)
layer of copper onto a thick (>3mm) aluminium base with very strong bonding
and very good thermal conductivity, please post. I don't mind if it's
electrically conductive or not, it must be low viscosity though, to form a
very thin strong bond with no voids.

Wish I could help but that's really outside my expertise. Maybe contact
a Loctite engineer about it?

 

[Lostgallifreyan]

Can't solder or weld here, it's a 3mm steel panel with plastic on the
other side. Which also kind of precludes heat-cure stuff such as Loctite
3880.

What margin for temperature? Even the tropics should leave you enough to try
one of various indium based solders.

 

[Lostgallifreyan]

They say "New lamination materials are available that can be processed
at even lower temperatures like 80°C." That's still a bit highish but I
wish they had mentioned some manufacturers.

Ok, maybe indium solder then, like I mentioned in another post. 73.8°C for
65% In 35% Bi.
O. K. A. Metalloids in NY make it, I think. It should work well with a resin
flux.

Wish I could help but that's really outside my expertise. Maybe contact
a Loctite engineer about it?

Maybe but I want to see what general advice I might get before turning to a
specific manufacturer.