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

Discussion in 'Electronic Components' started by Joerg, Jan 26, 2008.

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  1. Joerg

    Joerg Guest

    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.
     
  2. 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...
     
  3. Joerg

    Joerg Guest

    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.
     
  4. 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.
     
  5. Joerg

    Joerg Guest


    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.
     
  6. Joerg

    Joerg Guest

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

    Jamie Guest

    Lead glass window?
     
  8. Something like this?
    http://www.twpinc.com/twpinc/control/category/~category_id=TWPCAT_1?gclid=CJvN6p7mlJECFQMQlwodnAGrPg
     
  9. Jamie

    Jamie Guest

  10. Joerg

    Joerg Guest

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


    Best regards,
    Spehro Pefhany
     
  12. Joerg

    Joerg Guest

    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.
     
  13. My favorite 2-part conductive "glue" is made from tin and lead. Can't
    recall the name though. ;-)
     
  14. 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.
     
  15. 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...
     
  16. Joerg

    Joerg Guest

    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.
     
  17. Joerg

    Joerg Guest


    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.


    Wish I could help but that's really outside my expertise. Maybe contact
    a Loctite engineer about it?
     
  18. What margin for temperature? Even the tropics should leave you enough to try
    one of various indium based solders.
     
  19. 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.
    Maybe but I want to see what general advice I might get before turning to a
    specific manufacturer.
     
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