Re: EBSD statistically significant data
- From: metalengr@xxxxxxxxxxx
- Date: Wed, 24 Dec 2008 05:47:41 -0800 (PST)
On Dec 21, 4:21 pm, Gary G <see.signature@bottom> wrote:
Hi all:
I'm working on EBSD scan data collection and bumping against
a road block about whether the data is statistically
significant to be used for data analysis. This basic data collection
method and analysis will be used for several dozens of specimens.
They are all IC metal interconnects.
In my current situation, I am analyzing Al thin films
for grains characteristics. The basic values of interest
are total grains, edge grains (those not used in analysis) and
average grain size. So, how would one converge on a
reasonable range of total grains and edge grains given the
largest grain size and a good confidence index?
As an example, I call your attention to a recent article in
Microscopy Today. "Using EBSD to Map
Domain Structures in Ferroelectrics," September 2008, pg 18-19.
This article has maps with huge data points and poorly defined
edges. Is this due to poor data collection (scan summary data was
not provided) or is it due to analysis in poor vacuum systems?
My work is all high vacuum so I see these reported results
as failures if I did them. But is this typical of ESEM results?
And regardless of the vacuum, what constitutes statistically
significant data?
Any thoughts on this?
gary g.
Kiss French. Drink California.
gary at gaugler dot com
Gary:
There is an ASTM standard for measuring grain size, ASTM E1382. (The
older manual methods are discussed in ASTM E112. There are other
standards for as large as [ALA] and duplex grains).
For a brief discussion of quantitative metallography see:
http://www.buehler-asia.com/brochure/apps_support-tech-notes_vol1_issue5.pdf
Also see: http://www.metallography.com/grain.htm
Pittsburgh Pete
.
- Follow-Ups:
- Re: EBSD statistically significant data
- From: Gary G
- Re: EBSD statistically significant data
- References:
- EBSD statistically significant data
- From: Gary G
- EBSD statistically significant data
- Prev by Date: Re: Nikon Labophot fine focus problem
- Next by Date: Re: Servicing a Swift FM-31
- Previous by thread: EBSD statistically significant data
- Next by thread: Re: EBSD statistically significant data
- Index(es):
Relevant Pages
|
