Patent ID: 7524617

Claim:
A method for preparing, then exposing and then developing a single-layer low-temperature curable photosensitive composition for flexible circuitry applications, comprising the steps of: reacting one or more aromatic dianhydrides with one or more aliphatic diamines with a dry solvent to form a polyamic acid solution; providing an ethylenically unsaturated photo monomer mixture, comprising a compound selected from the group consisting of: amine (meth)acrylates, amine methacrylamides, and combinations thereof; and, a non-amine-containing (meth)acrylate compound; adding the photo monomer mixture, a photo initiator, and a sensitizer to the polyamic acid solution to form a photosensitive composition; exposing the photosensitive composition to actinic light to form an exposed composition; and developing the exposed composition in 1% aqueous carbonate at 80° C. for use in a flexible circuitry application.