SPI Gold Foil Thin Film Apertures
Examples of data taken using 1 and 2 µm hole apertures
A 1 µm aperture, or "microhole" is truly an engineering marvel.
We know of no other firm producing 1 µm holes of any quality, let alone
the superb quality found in the SPI Supplies 1 µm apertures. Available
only in the gold foil thin film form, these apertures have the
characteristics of a "self cleaning" aperture. However, 1 µm is so
small, that even in relatively clean vacuum systems, one might expect a
lifetime of not much more than 60 minutes.
The good news is that the gold foil thin film
apertures can be cleaned via plasma cleaning or plasma etching in an
SPI Plasma Prep™ II plasma etcher.
We don't know just how many times the apertures can be cleaned this way
however we do know that one should be able to get more than a single use.
But with the substantially smaller solid angle that results from such a
small aperture hole, one is able to see all kinds of features not other wise
visible or detectable. So while it might sound like a lot of money to pay
for a aperture, the point is if it extends the capabilities of a very
expensive TEM in this way, and enables one to obtain additional information
for just the price of several apertures, within the content of total costs,
this might be one of the better bargains around today!
Some examples of data not possible any other way
Resolution of twin boundaries in polymer single crystals
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Tuesday May 13, 2008
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