Ciba formed a joint venture with Olin Hunt, called Olin Ciba Geigy (OCG),
which then became Olin Microelectronic Materials.  I believe they still
handle the Polyimide/chemicals there in Rhode Island.Try calling Toni Z.
Bray, Product Manager, tel 401-431-5388
*********************************************************
Mac McReynolds
Sr. R&D Process Engineer
Caliper Technologies
email:  [email protected]
www.calipertech.com

> ----------
> From:         Jong In Song
> Reply To:     Jong In Song;[email protected]
> Sent:         Thursday, October 15, 1998 10:26 AM
> To:   [email protected]
> Subject:      Polyimide stripper
>
> I have been looking for a polyimide stripper that can resolve a cured
> polyimide (commercial products from Ciba Geigy  285 and Dupont PI 25XX
> cured
> ~250 C for ~ 1hr).  I used  such product manufactured by Ciba-Geigy
> (product
> number: QZ????) a long time ago (~ 6 year ago) while I was in the States.
> I
> was told that Ciba-Geigy discontinued the product and another company
> became
> a new  manufacturer of it.  Does anybody know which company produce such
> products ?   The QZ???? did not attack  materials used for semiconductor
> device processing such as semiconductors (Si, GaAs, InP, etc), dielectrics
> (Silicon dioxide, nitride), and metals (Ti, Ni, Pt, Au, etc) at all.
>
> I would really like to appreciate your help on this matter.
>
> Best wishes,
> Jong-In Song
>
> Associate Professor
> Dept. of Information and Communications
> Kwangju Institute of Science and Technology (K-JIST)
> 572 Sangam-dong Kwangsan-ku
> Kwangju, Korea 506-712
> tel) +82-62-970-2208
> fax) +82-62-970-2204
>
>
>