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Topic: Low Vac SEM  (Read 3879 times)

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Offline Mania28

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Low Vac SEM
« on: September 01, 2006, 04:43:16 AM »
Hi,

I would like to know how a Low Vacuum (not low voltage) SEM works. Why needn´t the sample be sputtered?

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Offline P

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Re: Low Vac SEM
« Reply #1 on: September 01, 2006, 06:35:32 AM »

In the same way an optical mic would look at reflected light  -  the SEM looks at reflected electrons - the sample needs to be coated so that it will reflect the electrons.     :)    They usually use a fine layer of gold or platinum I believe.

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Offline Mania28

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Re: Low Vac SEM
« Reply #2 on: September 04, 2006, 04:23:47 AM »
In Low Vac SEM, the Sample needn´t be coated. That´s why I want to know the trick behind this.
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