Thin LTO

[Kim, Han-jun]

Hi again,
 
If maintaing the processing temperature low is the main reason for you  
to go for LTO, you may want to try with PECVD oxide instead.  
Even though there is no good-quality PECVD deposition machine available 
at SNF yet, there must be many service vendors available outside where 
you can get well-controlled and nearly stress-free oxide films.  But such 
films are relatively porous than annealed LTO, so it may not be good for
working with very small devices. 
 
Best,
Han-Jun

===================================== 
Han-Jun Kim                  Hewlett-Packard Lab. 
(650) 857-8525               1501 Page Mill Rd. 
(650) 857-8948 FAX        MS 1198 
hjkim at hpl.hp.com          Palo Alto, CA 94304 
===================================== 

-----Original Message-----
From: Kim, Han-jun [mailto:hjkim at exch.hpl.hp.com]
Sent: Tuesday, June 03, 2003 5:01 PM
To: 'Alan Hsiung'
Cc: tylanbpsg at snf.stanford.edu
Subject: RE: Thin LTO


 
Hi,
 
Deposition rate of LTO is way too fast, in general, to make such 
thin film deposition controllable.  
 
In my experience (not at SNF), HTO deposited at 800~900 C using 
DCS and N2O (instead of silane and oxygen which are for LTO) 
provided high-quality film (as uniform and dense as thermal oxide) 
at a very controllable rate (down to ~ 4 A/min).  I didn't try it at SNF 
yet, but maybe Gladys or Maurice might give an answer if this process 
is available here. 
 
Thanks!
Han-Jun



===================================== 
Han-Jun Kim                  Hewlett-Packard Lab. 
(650) 857-8525               1501 Page Mill Rd. 
(650) 857-8948 FAX        MS 1198 
hjkim at hpl.hp.com          Palo Alto, CA 94304 
===================================== 


 -----Original Message-----
From: Alan Hsiung [mailto:hsiung at snf.stanford.edu]
Sent: Tuesday, June 03, 2003 4:30 PM
To: tylanbpsg at snf.stanford.edu
Subject: Thin LTO


Hi Folks,
    I am just wondering if anybody has the experience to deposit as thin as 200A LTO.
    If so, how kind of condition have you ever tried? How is the result? Uniformity and etc.
    I have been struggling to deposit such a thin LTO using LTO450P recipe, but no much luck.
    Any advice will be greatly appreciated.

Alan


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