Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the compound according to the present disclosure or by comprising a specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to produce an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.

Abstract: An ink-jet printhead includes a substrate on which an ink chamber to be supplied with ink to be ejected is formed on a front surface of the substrate, a manifold for supplying ink to the ink chamber is formed on a rear surface of the substrate, and an ink passage in communication with the ink chamber and the manifold is formed parallel to the front surface of the substrate, a nozzle plate formed on the front surface of the substrate, a nozzle formed through the nozzle plate through which ink is ejected from the ink chamber, a heater formed on the nozzle plate, and an electrode electrically connected to the heater for applying current to the heater.

Abstract: A monolithic ink-jet printhead includes a substrate having an ink chamber to be supplied with ink to be ejected on a front surface thereof, a manifold for supplying ink to the ink chamber on a rear surface thereof, and an ink channel in communication with the ink chamber and the manifold, a nozzle plate including a plurality of passivation layers stacked on the substrate and a heat dissipating layer overlying the passivation layers, the nozzle plate having a nozzle penetrating the nozzle plate, a heater formed between adjacent passivation layers and located above the ink chamber for heating the ink to be supplied within the ink chamber, and a conductor provided between adjacent passivation layers, the conductor being electrically connected to the heater for applying current across the heater, wherein the heat dissipating layer is made of a thermally conductive metal for dissipating heat from the heater.

Abstract: A monolithic ink-jet printhead includes a substrate having an ink chamber to be supplied with ink to be ejected on a front surface thereof, a manifold for supplying ink to the ink chamber on a rear surface thereof, and an ink channel in communication with the ink chamber and the manifold, a nozzle plate including a plurality of passivation layers stacked on the substrate and a heat dissipating layer overlying the passivation layers, the nozzle plate having a nozzle penetrating the nozzle plate, a heater formed between adjacent passivation layers and located above the ink chamber for heating the ink to be supplied within the ink chamber, and a conductor provided between adjacent passivation layers, the conductor being electrically connected to the heater for applying current across the heater, wherein the heat dissipating layer is made of a thermally conductive metal for dissipating heat from the heater.

Abstract: A monolithic ink-jet printhead includes a substrate having an ink chamber to be filled with ink to be ejected on a front surface, a manifold for supplying ink to the ink chamber on a rear surface, and an ink channel communicating between the ink chamber and the manifold, a barrier wall formed on the front surface of the substrate to a predetermined depth and defining at least a portion of the ink chamber in a width-wise direction, a nozzle plate including a plurality of material layers stacked on the substrate and having a nozzle penetrating the nozzle plate, so that ink ejected from the ink chamber is ejected through the nozzle, a heater formed between adjacent material layers and located above the ink chamber for heating ink to be supplied within the ink chamber; and a conductor for providing current across the heater being provided between adjacent material layers.

Abstract: An ink-jet printhead includes a substrate on which an ink chamber to be supplied with ink to be ejected is formed on a front surface of the substrate, a manifold for supplying ink to the ink chamber is formed on a rear surface of the substrate, and an ink passage in communication with the ink chamber and the manifold is formed parallel to the front surface of the substrate, a nozzle plate formed on the front surface of the substrate, a nozzle formed through the nozzle plate through which ink is ejected from the ink chamber, a heater formed on the nozzle plate, and an electrode electrically connected to the heater for applying current to the heater.

Abstract: A monolithic ink-jet printhead includes a substrate having an ink chamber to be filled with ink to be ejected on a front surface, a manifold for supplying ink to the ink chamber on a rear surface, and an ink channel communicating between the ink chamber and the manifold, a barrier wall formed on the front surface of the substrate to a predetermined depth and defining at least a portion of the ink chamber in a width-wise direction, a nozzle plate including a plurality of material layers stacked on the substrate and having a nozzle penetrating the nozzle plate, so that ink ejected from the ink chamber is ejected through the nozzle, a heater formed between adjacent material layers and located above the ink chamber for heating ink to be supplied within the ink chamber; and a conductor for providing current across the heater being provided between adjacent material layers.

Abstract: An ink-jet printhead includes a substrate on which an ink chamber to be supplied with ink to be ejected is formed on a front surface of the substrate, a manifold for supplying ink to the ink chamber is formed on a rear surface of the substrate, and an ink passage in communication with the ink chamber and the manifold is formed parallel to the front surface of the substrate, a nozzle plate formed on the front surface of the substrate, a nozzle formed through the nozzle plate through which ink is ejected from the ink chamber, a heater formed on the nozzle plate, and an electrode electrically connected to the heater for applying current to the heater.

Abstract: A monolithic ink-jet printhead includes a substrate having an ink chamber to be filled with ink to be ejected on a front surface, a manifold for supplying ink to the ink chamber on a rear surface, and an ink channel communicating between the ink chamber and the manifold, a barrier wall formed on the front surface of the substrate to a predetermined depth and defining at least a portion of the ink chamber in a width-wise direction, a nozzle plate including a plurality of material layers stacked on the substrate and having a nozzle penetrating the nozzle plate, so that ink ejected from the ink chamber is ejected through the nozzle, a heater formed between adjacent material layers and located above the ink chamber for heating ink to be supplied within the ink chamber; and a conductor for providing current across the heater being provided between adjacent material layers.

Abstract: An ink-jet printhead includes a substrate on which an ink chamber to be supplied with ink to be ejected is formed on a front surface of the substrate, a manifold for supplying ink to the ink chamber is formed on a rear surface of the substrate, and an ink passage in communication with the ink chamber and the manifold is formed parallel to the front surface of the substrate, a nozzle plate formed on the front surface of the substrate, a nozzle formed through the nozzle plate through which ink is ejected from the ink chamber, a heater formed on the nozzle plate, and an electrode electrically connected to the heater for applying current to the heater.

Abstract: A monolithic ink-jet printhead includes a substrate having an ink chamber to be filled with ink to be ejected on a front surface, a manifold for supplying ink to the ink chamber on a rear surface, and an ink channel communicating between the ink chamber and the manifold, a barrier wall formed on the front surface of the substrate to a predetermined depth and defining at least a portion of the ink chamber in a width-wise direction, a nozzle plate including a plurality of material layers stacked on the substrate and having a nozzle penetrating the nozzle plate, so that ink ejected from the ink chamber is ejected through the nozzle, a heater formed between adjacent material layers and located above the ink chamber for heating ink to be supplied within the ink chamber; and a conductor for providing current across the heater being provided between adjacent material layers.

Abstract: An ink-jet printhead includes a substrate having an ink chamber on a front surface thereof, the ink chamber to be supplied with ink to be ejected, a manifold for supplying ink to the ink chamber on a rear surface thereof, and an ink channel in communication with the ink chamber and the manifold, an impurity filtering layer formed on the rear surface of the substrate between the manifold and the ink channel for filtering impurities in ink flowing into the ink channel from the manifold, a nozzle plate formed on the front surface of the substrate, a nozzle formed through the nozzle plate at a position corresponding to a central part of the ink chamber, a heater formed on the nozzle plate, the heater being formed around the nozzle, and an electrode electrically connected to the heater for applying current to the heater.

Abstract: A monolithic ink-jet printhead includes a substrate having an ink chamber to be supplied with ink to be ejected on a front surface thereof, a manifold for supplying ink to the ink chamber on a rear surface thereof, and an ink channel in communication with the ink chamber and the manifold, a nozzle plate including a plurality of passivation layers stacked on the substrate and a heat dissipating layer overlying the passivation layers, the nozzle plate having a nozzle penetrating the nozzle plate, a heater formed between adjacent passivation layers and located above the ink chamber for heating the ink to be supplied within the ink chamber, and a conductor provided between adjacent passivation layers, the conductor being electrically connected to the heater for applying current across the heater, wherein the heat dissipating layer is made of a thermally conductive metal for dissipating heat from the heater.