Hi Mighty Platypus,

    Thank you for your help first. Yes. I put the cantilever beam
underwater.  And the cantilever is made of polymer and Pt (2 layers).
First deposit polymer and then Pt. And it is surely a free standing beam.


    Then, it means that we can't avoid the bubbles?

Yours,
Hoyin


>From: Mighty Platypus 
>Reply-To: mems-talk@memsnet.org
>To: mems-talk@memsnet.org
>Subject: Re: [mems-talk] Problem in applying Voltage across Pt
>Date: Mon, 29 Apr 2002 09:41:18 -0700 (PDT)
>
>Chan Ho Yin,
>I think your problem needs a little more description. First, is your
>device a platinum cantilever beam directly deposited on a silicon
>substrate, with no other layers?
>Second, it reads as if you are sticking two probes (of unknown
>material) on to a platinum wire, with nothing else between them. There is
>no mention of what kind of atmosphere they have been placed in. But,
>electroysis makes me think of water. So, what are the probes made of, what
>kind of circuit do they form, and are they in air, water, or something
>else?
>
>If it turns out you have naked wires in water, then you'll definitely have
>electrolysis, even at relatively low voltages.
>
>Jesse Fowler
>   UCLA/MAE Dept., 420 Westwood Plaza, Room 37-129, ENGR IV
>   Los Angeles, CA 90095-1597 | (310)825-3977
>"Battery is safe if not provoked." -- _Batteries in a Portable World_
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>
>
>On Sat, 27 Apr 2002, Chan Ho Yin wrote:
>
> > Hi all,
> >
> >     I have deposited Pt onto Si substrate and make Pt into a line. When
I
> > applied DC voltage to its two ends by micro probes, I found that there
are
> > many bubbles come out from the contact point between the probes and Pt
> > layer.  I guess it dues to electrolysis. I also applied AC to it.. But
> > still many bubbles...
> >
> >    What is the problem??  Can I reduce the bubbles or stop the bubbles
> > generated??  Can you suggest me some methods??????????
> >
> >   By the way, the structure is a cantilever beam.  (2 layers).
> >
> > Thank you.
> >
> > Yours,
> > Hoyin
> >
> > _________________________________________________________________
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