Default configuration for sem4160

James Conway jwc at
Wed Oct 28 10:44:51 PDT 2009

Hello Nahid:

Good suggestion but I think not and here is why:

1. Many Users utilize this tool for different types of SEM imaging and 
analysis which require various acceleration voltages, differing working 
distances, and various aperture settings mainly due to the sample type.

2. All Users are expected to develop sufficient skill on the tool to 
align the Gun and Movable aperture plate and subsequently obtain a 
suitable SEM image of good quality and resolution.  If they need 
additional training, especially if it is application specific to their 
samples, they should schedule a session with me for assistance, further 
training and support...

3.  I have a large number of people whom were trained on the tool, 
before I took over this tool  last year, whom were not trained in Gun or 
Aperture plate alignment. A few others recently have returned to the 
tool after a year or more away and in my humble opinion should attend 
refresher training on the tool.  Users interested in obtaining more 
training should either attend any of my Bimonthly SEM Practicum sessions 
on the second and fourth Wednesday of the month from 10 AM - 12:30 PM or 
make a appointment with me to work together on the */sem4160/* or 
It is also recommended that when you first come on the tool to start out 
at the acceleration voltage of the previous user employed and bring up 
the beam and only them change to your preferred parameters.  This may 
make it easier for new users to locate your first view in SEM contrast 
and then perform the Gun alignment.  Additionally there is a section in 
the function keys that have saved settings on the tool that I recently 
established and I will test these out in the coming week and report back 
to the list. 

Every Lab member's work is important to me and I wish for you all to 
obtain optimal resolution and results using the Ebeam labs tools.

If you need help all you need to do is ask, preferably by scheduling an 
appointment in advance.

I welcome comments and your opinions on any matter in the Ebeam lab.

Thank you for your support!

James Conway

Nahid Harjee wrote:
> James,
> I'd like to propose that we establish a default configuration for the 
> sem4160 - a group of settings that will permit most users to get 
> decent images. Settings that come to mind that should be included in 
> this config are Vacc = 5 kV, objective aperture = 3, and raster 
> rotation = 0 deg. If a user changes the tool settings from the default 
> config, s/he should be expected to restore it at the end of the 
> session. Too often I come to the tool for something that should be 
> quick and have to spend a great deal of time identifying and reverting 
> what the previous user did. Others I've spoken to have also mentioned 
> this is a problem.
> Let me know what you think.
> nh
> -- 
> Nahid Harjee
> Ph.D. Candidate
> Electrical Engineering
> Stanford University
> 408-761-8651
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