Ultraviolet-Curable Conductive Ink and Dielectric Ink Compositions Having a Common Binding Medium, with Manufactures and Fabrication Methods

A composition for an ultraviolet-curable binding medium which may be utilized for a dielectric ink and for a conductive ink, the composition comprising:

• a difunctional oligomer comprising a difunctional aliphatic polycarbonate urethane acrylate oligomer;
• a monofunctional monomer selected from the group consisting of:
• urethane monomers, acrylate monomers, epoxy monomers, vinyl monomers, vinyl-ether monomers, polyester monomers, and mixtures thereof;
• a difunctional or trifunctional monomer selected from the group consisting of:
• urethane monomers, acrylate monomers, epoxy monomers, vinyl monomers, vinyl-ether monomers, polyester monomers, and mixtures thereof;
• a first photoinitiator;
• and
• a second photoiniator different from the first photoinitiator.

A composition for an ultraviolet-curable binding medium which may be utilized for a dielectric ink and for a conductive ink, the composition comprising:

• a difunctional aliphatic polycarbonate urethane acrylate oligomer present in an amount between about 47.5% to 52.5% by weight;
• a monofunctional acrylate monomer present in an amount between about 27.5% to 32.5% by weight and selected from the group consisting of:
• an isophoryl acrylate monomer, an acrylate ester monomer, a 3,3,5 trimethyl cyclohexanol acrylate monomer, and mixtures thereof;
• a difunctional acrylate monomer present in an amount between about 3.0% to 6.0% by weight and selected from the group consisting of:
• a difunctional alkoxylated acrylate monomer, a difunctional methacrylate monomer, an alkoxylated hexandiol acrylate monomer, a 1,6-hexandiol diacrylate monomer, and mixtures thereof;
• a first photoinitiator present in an amount between about 9.0% to 11.0% by weight and comprising an α-hydroxyketone class photoinitiator;
• a second photoiniator different from the first photoinitiator, the second photoiniator present in an amount between about 4.0% to 6.0% by weight and comprising an α-aminoketone class photoinitiator;
• and
• one or more copolymers of ethyl acrylate and 2-ethylhexyl acrylate present in an amount between about 0.7% to 1.5% by weight.