Abstract:
A thixotropic conductive composition is disclosed that can be used to form conductive features on an electronic device. The thixotropic composition comprises a conjugated polymer, a solvent, and multi-wall carbon nanotubes. The conjugated polymer and the solvent are capable of forming a thixotropic fluid. This enables excellent stability of the carbon nanotubes in the composition at a very high loading. The composition has a long shelf life.
Abstract:
An electronic device, such as a thin-film transistor, includes a substrate and a dielectric layer formed from a dielectric composition. The dielectric composition includes a dielectric material, a crosslinking agent, and a thermal acid generator. In particular embodiments, the dielectric material comprises a lower-k dielectric material and a higher-k dielectric material. When deposited, the lower-k dielectric material and the higher-k dielectric material form separate phases. The thermal acid generator allows the dielectric layer to be cured at relatively lower temperatures and/or shorter time periods, permitting the selection of lower-cost substrate materials that would otherwise be deformed by the curing of the dielectric layer.
Abstract:
A pH sensor contains a potentiometric sensing electrode made of palladium. An optional metal oxide layer may be coated on the palladium electrode to enhance sensitivity. The pH sensor has high sensitivity, a shorter response time, and good reversibility and stability.
Abstract:
A solder mask ink for aerosol jet printing includes a metal oxide and a propylene glycol-based solvent; the solder mask ink has a viscosity from about 50 cps to about 1,000 cps at shear rate of 10 1/s at 25° C., and a shear thinning index from about 1.0 to about 2.0.
Abstract:
A transistor has a substrate, source and drain electrodes on the substrate, the source and drain electrodes formed of a conductor ink having silver nanoparticles with integrated dipolar surfactants, an organic semiconductor forming a channel between the source and drain electrodes, the organic semiconductor in contact with the source and drain electrodes, a gate dielectric layer having a first surface in contact with the organic semiconductor, and a gate electrode in contact with a second surface of the gate dielectric layer, the gate electrode formed of silver nanoparticles with integrated dipolar surfactants.
Abstract:
A solder mask ink composition is disclosed. The solder mask ink composition includes an epoxy resin; a solvent in an amount of at least 20% by weight relative to the total weight of the solder mask ink composition; and optionally a non-ionic surfactant. The ink composition has a viscosity that is less than 1000 cps at a shear rate of 10 s−1 and greater than 30 cps at a shear rate of 495 s−1 and a temperature of 25° C.
Abstract:
A semiconductor composition for producing a semiconducting layer with consistently high mobility is disclosed. The semiconductor composition includes a diketopyrrolopyrrole-thiophene copolymer and an aromatic non-halogenated hydrocarbon solvent. The copolymer has a structure disclosed within. The aromatic non-halogenated aromatic hydrocarbon solvent contains sidechains having at least 2 carbon atoms and the aromatic ring contains at least 3 hydrogen atoms.
Abstract:
A conductive composition that comprises a branched metal carboxylate and one or more solvents. The solvents may be an aromatic hydrocarbon solvent. In embodiments, the branched metal carboxylate is a silver carboxylate. The conductive composition may be used in forming conductive features on a substrate, including by inkjet printing, screen printing or offset printing.