Re: features visible at low magnification are not "clear" at high magnification

On Mon, 19 Dec 2005 20:20:38 -0800, Gary G <see.signature@bottom>
wrote:

>On 19 Dec 2005 09:20:54 GMT, jjedwab@xxxxxxxxx (jacques jedwab) wrote:
>
>>I can't tell you much about the "why's", but here is a trick about "how to
>>make it visible": you just vaporize a very thin layer of carbon with a
>>vacuum sputtering machine, such as used by SEM and EMP techniques. Your
>>indentation will become neatly visible under reflected light microscopy.
>>
>>J.J.
>>
>
>
>I do this all the time. However, I use a coating of Au/Pd. The
>coating makes a big difference when viewed optically. Under SEM,
>it makes little difference.
>
>

As a note, this technique is used for examinining stress cracks,
separatation fractures and other issues that do not show up
monumentally under SEM. The thin (80A) coating really makes a
difference.


Gary Gaugler, Ph.D.
Microtechnics, Inc.
Granite Bay, CA 95746
916.791.8191
gary@microtechnics dot com
.

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