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Re: Looking for thin, metal tape for shielding
yeh I've not heard of MOM transistors either. But as for metal tape I'd
use Aluminium tape. RS sell the stuff by the role. All good hardware
stores sell Aluminium tape too. I use it to cover pipe thermal insulation
on our cooling systems.
hope this is of some help
regards
-----------------------
Khalid Schofield
(686b 6c61 6469 7320 6863 666f 6569 646c 000a)
Unix System Administrator and EM Technician
Department of Materials
University of Oxford
Parks Road
Oxford OX1 3PH
UK
Tel: +44-1865-273785
Fax: +44-1865-273789
khalid.schofield@materials.ox.ac.uk
(686b 6c61 6469 732e 6863 666f 6569 646c
6d40 7461 7265 6169 736c 6f2e 2e78 6361
752e 0a6b)
http://www-em.materials.ox.ac.uk/people/schofield/index.html
On 10 Jul 2003, Arno Wagner wrote:
> In comp.sys.ibm.pc.hardware.misc Michael Pender <mpender@hotmail.com> wrote:
> > Tony 'Nicoya' Mantler <nicoya@apia.dhs.org> wrote in message
> > nicoya-67D955.15253109072003@shawnews.wp.shawcable.net">news:nicoya-67D955.15253109072003@shawnews.wp.shawcable.net...
> >>
> >> I would think that even if the adhesive isn't conductive, the capacitive
> >> coupling to the grounded parts of the shielding that the tape would
> >> partially cover should be enough to handle most EMI concerns.
>
> > I think the *opposite* is true because you would essentially form a huge
> > metal-oxide-metal (MOM) transistor, i.e.:
>
> > metal tape layer
> > ---------------------------------------------
> > capacitive coupling through adheisive layer
> > ---------------------------------------------
> > metal shielding layer
>
> This has no transistor effect at all. If it had, every capacitor
> would be a transistor.
>
> I also have never heard of MOM stransistrs, only MOS.
>
> The key to MOS transistors is a semi-conductor that has movable
> electrons and can be made more or less conducting by applying an
> external electric field.
>
> Should I be mistaken, please provide a reference for "MOM Transistors"
>
> Regards,
> Arno
>
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>
>