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Bright White LEDs that are Static Sensitive!!!

Discussion in 'Electronic Repair' started by Brad Petria, Jan 24, 2004.

  1. Brad Petria

    Brad Petria Guest

    Hi,
    Once I ordered some bright white LEDs from Jameco, which
    were not static sensitive (no warning notice). I ordered another
    type, N-94C6256, from another source and they came in a static
    shielding bag with a warning!!!!! There is no information about
    these. Why are these LEDs static sensitive?

    Thanks in advance, Brad

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    using "PC Link", which I downloaded from www.simtel.net (cool site).

    http://www.simtel.net/pub/pd/52792.html (info or download)
     
  2. Jim Yanik

    Jim Yanik Guest

    (Brad Petria) wrote in
    Actually,LED's being semiconductor devices,they SHOULD be shipped in anti-
    static packaging. They're no different than any other diode.

    Think about -how- static discharge damages semiconductor junctions.
    Or recall the model for static discharge;the voltage and joules contained
    in a single spike.
     
  3. Jim shedden

    Jim shedden Guest

    Once I ordered some bright white LEDs from Jameco, which
    Hi Brad,

    It is best to treat all semiconductors as static sensitive and it's a
    good habit to form. I work for a government contractor and we can't go
    near anything without following static preventative procedures that we
    are tested and certified on yearly. At home I can't be quite as
    aggressive about it. I'm not going to install special flooring or wear
    a smock, but I do use a wrist strap, anti-static mat, and anti-static
    soldering and desoldering tools.

    Regards,
    Jim
     
  4. Andre

    Andre Guest

    Yup, I had a few white LEDs get toasted for no apparent reason.
     
  5. Jim Yanik

    Jim Yanik Guest

    (Brad Petria) wrote in
    Because they are semiconductor devices;they have a junction that can be
    damaged by overvoltage just like any other diode.

    FYI,static charges can vary from 30 volts to several *thousand* volts,with
    high instantaneous currents.That's how they destroy semis.

    LEDs are just diodes with low reverse breakdown V.

    Static discharges can weaken semis,and cause failure days,months
    later,too,not just immediately.
     
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