Antitarnish

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    AT-2000

    An oxidation inhibitor concentrate which is added to water to prevent tarnishing of copper and copper alloys. AT-2000reacts chemically with clean copper surfaces to form an invisible barrier that resists handling and environmental effects. AT-2000can be used prior to resist application, after electroless copper, and in the SMOBC process.

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    AT-3000

    AT-3000 is a concentrated antitarnish compound which prevents tarnishing of copper and
    copper alloys. It reacts chemically with clean copper surfaces to form an invisible barrier
    that resists handling and environmental effects. AT-3000 can be used after electroless
    copper, prior to photoresist application, and in the SMOBC process. It also can be used as
    an additive to photoresist stripping solutions to prevent copper oxidation. When used
    following electroless copper deposition, AT-3000 enhances the adhesion of dry film
    photoresists.