Hello everyone,

I am a researcher at the National Institutes of Health searching for fiber
optic pressure sensors that can be used as ultrasound imaging transducers in an
MR scanner. This is a developing medical field of combining ultrasound with
interventional MRI. The sensors need to work at 1MHz frequency range in a
strong magnetic field ( a few teslas), with ac sensitivities around a few
pascal at less than 1 inch diameter. Appreciate any info, suggestions or
collaborations on this.


Han Wen, Ph.D.
Laboratory of Cardiac Energetics
National Institutes of Health
Bethesda, Maryland 20892


From M A Straub (Marc) Wed Mar 06 00:10:49 1996
To: [email protected]
Subject: Re: Photoresist question
From: "M A Straub (Marc)"
Date: Wed Mar 06 00:10:49 1996
Lines: 21

On Feb 22, 12:52pm, Wen Li wrote:

> Subject: Re:  Photoresist question
> Hi Chris,
>       We have had the same problem at JPL.  The problem was solved
> by spraying PR but the minimum thickness obtainable was about 3.5microns.
>
>       [email protected]
>
>-- End of excerpt from Wen Li




Could you provide any more details on your process for spraying photoresist-
where you bought equipment, which resists you tried, etc.  Thank you.

Marc Straub
Automotive Components Division
Ford Motor Co., Dearborn, MI
[email protected]