Good morning, Karen; you said:


>1.  Electromigration requires DC voltages and currents.
>
>        a. AC voltages and and current will not cause
>           the electrodissolution of copper, silver,
>           tin or lead.  The only materials that corrode
>           with imposed AC (<~10 kHz). are amphoteric
>           materials, like aluminum.
>
>        b. AC voltage and currents will not allow the
>           the electrodeposition of any metal that I know.
>           The metal deposited during one half wave will
>           dissolved during the 2nd half wave.
>
>2.  Imposing a small AC voltage (5 to 50 mV) on top
>    of a DC voltage and looking at the resulting
>    small AC current is good way of studying
>    electrochemical reactions like dissolution and
>    deposition of metals.  The frequencies used range
>    from 1 mHz to 100 kHz.  Frequencies over 100 kHz,
>    such as RF, are not useful for looking at
>    electrochemical reactions because the chemical
>    kinetics of these reactions are too slow.

1) I _love_ that kind of talk.
2) Been waiting a long time for someone to techno-incinerate Graham Naisbitt.


thanks,


Jerry

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