Greetings,
My suggestion HD 2771 it is dated however available ,it uses a water soluble
developer like MF 321.  once developed you use DI water to remove the
unwanted PI.
Advantage no odor,no strong chemicals
Perfect for your application.
Kind Regards
Walter
www.elume.com

-----Original Message-----
From: K A Chan [mailto:[email protected]]
Sent: Wednesday, January 11, 2006 1:15 AM
To: General MEMS discussion
Subject: Re: [mems-talk] Polyimide Selection

Brandon,

You can go to HD microsystems website to look for such polyimides.
For photodefinable thick films, try to look for PI-2731, PI-2771 or HD-8820.

Good luck.
Chan

Jun Choi wrote:

>
> I am trying to find appropriate polyimide either photodefinable or
> standard to coat 20 micron of dielectric layer film. I'm mainly concerned
> on the dielectric constant property to be around 3.3 to 3.5, and
> resolution of at least 20 microns. Can anyone give me advices on the
> selection of polyimides. Will photodefinalbe polymide be applicable
> for the
> above specs?