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Solder like glue ?

Discussion in 'Electronic Design' started by JR, Nov 23, 2004.

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  1. JR

    JR Guest

    That means solder which likes glue. When i squeeze the "solder glue"
    on the joint, it will be dried in few seconds and the components are
    fixed on the motherboard. Of course the "solder glue" is conductive.

    Does this products exist ?

    So that users do not need solder iron again and save one hand :)

    I think it's quite useful and convenient, especially for electronics
    beginners / students.

    Thanks very much for answer.

    --
     
  2. Jim Thompson

    Jim Thompson Guest

    Solder Glue = Cold Joint ;-)

    ...Jim Thompson
     
  3. JR

    JR Guest

    it's your opinion.
     
  4. Jim Thompson

    Jim Thompson Guest

    No. It's _experience_.

    ...Jim Thompson
     
  5. Tim Wescott

    Tim Wescott Guest

    There are conductive glues out there, if that's what you mean. If they
    were comparable with solder in performance I think folk would be using
    them instead of sweating over lead-free solders.
     
  6. Bison Electro kit. Contains silver particles. Very expensive.
    Never tried it.
     
  7. When I studied electronics 20+ years ago, we were taught that a solder
    connection actually made a chemical bond between the two metallic
    surfaces, that it was comparable/similar to a melting and combining of
    the two metals, there was actually a change at the atomic level.
    Airplane/model glue used to do that to plastic, at least when I was a
    kid. A good solder glue would have to be able to do that, I'd think.

    Tom
     
  8. Pig Bladder

    Pig Bladder Guest

    Top-post _and_ use the sig delimiter to suppress the _whole_ post that
    you're following up to?

    What a waste of bandwidth you are.
     
  9. Brian

    Brian Guest

    Again, same experience here. Cold joint. Solder bonds on a much more
    efficient level than glue.

    That being said, it does exist. In those circuit fixing pens. Lose a pad,
    use some of that stuff in a non-critical app.
     
  10. Guest

    Does it have to solder? How bout silver epoxy. Used it to bond down
    filters that needed good ground connection in shaky eviroments.
     
  11. Rich Grise

    Rich Grise Guest

    OOPpps! I meant to sign this as me! Sorry for the confusion. New spoof ID,
    and all that.
    Thanks,
    Rich
     
  12. Robert Baer

    Robert Baer Guest

    Not quite correct.
    There is some alloying of the copper wire and the solder.
    In fact, there is an alloy of Ersin Multicore that is called SAVBIT
    that has some copper in the alloy, so to protect copper tips ("bits" in
    England) from being "eaten" away.
     
  13. Tim Shoppa

    Tim Shoppa Guest

    Remember the Tektronix tube scopes? They used silver-on-ceramic terminal
    strips, that required a special solder because if you used "normal"
    tin/lead solder it would leach silver from the terminal strip somehow. The Tek
    scopes had little spools of silver-bearing solder inside that was appropriate
    for repairs.

    Tim.
     
  14. Rich Grise

    Rich Grise Guest

    Yes, the metal of the terminal definitely does dissolve in the solder, to
    a certain degree - this is also why tips erode. I was only nitpicking
    about whether this dissolving action could really be called a "chemical
    reaction," which they taught me would result in new compounds, not just a
    new alloy.

    And, if somebody were to come up with some kind of glue that purports to
    make as good of an electrical connection as solid metal, I still wouldn't
    buy the stuff, because they're blowing smoke up my ferndock. :)

    Thanks,
    Rich
     
  15. Jim Yanik

    Jim Yanik Guest

    You could probably get it sufficiently cured(but not fully cured) faster by
    putting the workpiece in a warm enclosure,box with a Xmas lamp string
    inside.
    Here in sunny Florida,I just put it out in my car,gets to 140 deg in there
    on many days.
     
  16. Jim Yanik

    Jim Yanik Guest

    (Tim Shoppa) wrote in
    Ah,yes,the good ol' days...
    Nowdays,you can't even get TEK to include real schematics in their "service
    manuals".


    And those ceramic strips were very handy in creating test load for
    switchers or for cal fixtures.Hot glue them down to a old CRT filter or the
    bottom of a metal box,and you're ready to assemble.I hated it when they
    were deleted from bench stock.
     
  17. Robert Baer

    Robert Baer Guest

    Exactly the same problem.
    The ceramic strrips had silver plated fillets for the components, and
    standard solder would leach away the silver, due to the alloying i
    mentioned.
    Using a silver-bearing solder (3% silver, if i remember corretly)
    prevented leaching, as the solder was already a eutectic (chemically
    "balanced" alloy).
     
  18. Dan Major

    Dan Major Guest

    Solder forms a compound called an amalgam, where the copper of the wire is
    dissolved by the lead in the solder. The old model airplane glue was
    mostly tolulene, which dissolved the pieces of plastic, then evaporated.
    Neither causes a change at the atomic level.
     
  19. Mark Jones

    Mark Jones Guest


    You could check out
    http://www.action-electronics.com/chemtron.htm#Grease if it hasn't
    already been mentioned.
     
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