Kevin ,
        Ciba Specialty Chemical has the Probelec line of Dielectrics,
and you can also get the negative version in a dry film
         as Vialux 81 from Dupont.
        Additionally Shipley,  Amoco, and Enthone  have PID materials.
IBM is having a material made and it can be purchased
         with a license for use through Morton.
        The New IPC 4104 lists 3 dry film epoxy , 2 liquid epoxy, 1 Dry
film epoxy. blend and 5 liquid epoxy blend materials in the
         Slashsheets.

        If you have any further questions please don't hesitate to
contact me.

        Lastly , I  can help you with information or facilitate running
of samples with either the  Ciba or Dupont materials if you would
         like ,




Russell L Smith
Ciba Specialty Chemicals
russell.smith @ cibasc.com
407-291-2333

 ----------
From: [log in to unmask]
To: [log in to unmask]
Subject: [TN] Photo Definable Dielectric Suppliers
Date: Wednesday, March 31, 1999 12:44PM

Who are the suppliers of photo-definable dielectric materials for PWB
based HDI circuit?  Would these materials work for flex circuit?
Many thanks in advance for your help.

Kevin Chen
3M Corp.
651 737-9914

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