Subject: Re: Reservation removed from 5:00-9:00pm Wed
From: James Conway <>
Date: Thu, 12 Aug 2004 09:08:25 -0700

Greetings Raith people:


 I will be scuffing off and cleaning the contact clips in the Std. 
Sample Holder and checking resistivity to see if this will improve 
grounding of the samples on this assembly.

Certainly things seemed to have declined over the course of the last 
week.  I have recently come to the conclusion that some contamination if 
evident in the column. I will be encouraging ZEISS to consider 
performing another Preventative Maintenance routine on the column and 
blanker assemblies.  RAITH has also been informed.

Thank you,

James Conway

Charis Quay Huei Li wrote:

>Arvind, I saw that too on Friday but not today. I think it may be sample
>dependent. I have highly-doped Si substrates with 1 micron of oxide. The
>only difference between Friday and today is the fact that the sample was
>better grounded today. What are your samples and how is the grounding?
>Have you seen this problem before? Let me know. Thanks. Charis.