| 摘要 |
Multiple photocured and copper electrolessly plated patterns are formed on a continuous flexible solid polymeric film in a roll-to-roll process. A photocurable composition is applied directly to the film in a patternwise fashion using flexographic printing members to form multiple patterns of the photocurable composition directly on the film. The photocurable composition contains an N-oxyazinium salt photoinitiator, a photosensitizer for the N-oxyazinium salt, an organic phosphite N-oxyazinium salt efficiency amplifier, an aromatic heterocyclic nitrogen-containing base, a metal seed catalyst for copper electroless plating, and one or more photocurable acrylates in designed relationships. The multiple patterns of the photocurable composition are exposed to form multiple photocured patterns directly on a product substrate and then electrolessly plated with copper to form multiple copper electrolessly plated patterns. Each electrically-conductive pattern can be incorporated into an electronic device for various purposes including touch screen displays. |
| 主权项 |
1. A method for providing multiple photocured and copper electrolessly plated patterns in a roll-to-roll process, comprising:
applying a photocurable composition directly to a product substrate that is a continuous flexible solid polymeric film in a patternwise fashion using an uppermost relief surface of one or more flexographic printing members to form multiple patterns of the photocurable composition directly on the continuous flexible solid polymeric film during relative movement of the continuous flexible solid polymeric film and the uppermost relief surface of the one or more flexographic printing members to each other in the roll-to-roll process,
wherein the photocurable composition comprises an N-oxyazinium salt photoinitiator, a photosensitizer for the N-oxyazinium salt, an organic phosphite N-oxyazinium salt efficiency amplifier, aromatic heterocyclic nitrogen-containing base, a metal seed catalyst for copper electroless plating in an amount of at least 0.5 weight % based on the total weight of the photocurable composition, and one or more photocurable acrylates in an amount of at least 50 weight % based on the total weight of the photocurable composition, andthe N-oxyazinium salt photoinitiator is present in an amount of at least 0.1 weight % and up to and including 20 weight %, the photosensitizer for the N-oxyazinium salt is present in an amount of at least 0.001 weight % and up to and including 5 weight %, the organic phosphite N-oxyazinium salt efficiency amplifier is present in an amount of at least 0.1 weight % and up to and including 20 weight %, and the aromatic heterocyclic nitrogen-containing base is present in an amount of at least 0.1 weight % and up to and including 20 weight %, all based on the total weight of the one or more photocurable acrylates, exposing the multiple patterns of the photocurable composition directly on the product substrate to photocuring electromagnetic radiation to form multiple photocured patterns directly on the product substrate in the roll-to-roll process, and electrolessly plating the multiple photocured patterns directly on the product substrate with copper to form multiple copper electrolessly plated patterns on the product substrate in the roll-to-roll process, each copper electrolessly plated pattern having an average copper line width of less than 15 μm. |
