Abstract: An ink-jet printhead includes a substrate having an ink chamber and a manifold, a nozzle plate formed on the substrate, first and second heaters and conductors, a material layer, and a plurality of ink channels. The nozzle plate includes a plurality of passivation layers formed of an insulating material, a heat dissipation layer formed on the plurality of passivation layers and made of a thermally conductive material, and a nozzle passing through the nozzle plate and in flow communication with the ink chamber. The first and second heaters and conductors are interposed between adjacent passivation layers of the nozzle plate. The material layer is interposed between the ink chamber and the manifold to form a bottom wall of the ink chamber and a top wall of the manifold. The plurality of ink channels is formed in the material layer to provide flow communication between the ink chamber and the manifold.

Abstract: A monolithic ink-jet printhead, and a method of manufacturing the same, includes a substrate having an ink chamber, an ink channel, and a manifold, a nozzle plate formed on the substrate, a nozzle, a heater, and a conductor. The ink chamber includes sidewalls formed to a predetermined depth from the front surface of the substrate for defining side surfaces of the ink chamber and a bottom wall formed parallel to the front surface of the substrate at the predetermined depth from the front surface of the substrate for defining a bottom surface of the ink chamber. The nozzle plate includes a plurality of passivation layers, a heat dissipating layer being stacked on the passivation layers, and the nozzle for ejecting ink out of the printhead. The heater is positioned above the ink chamber and heats ink in the ink chamber and the conductor delivers a current to the heater.

Abstract: In an ink-jet printhead and a method for manufacturing the same, the ink-jet printhead includes a substrate, an ink chamber to be filled with ink formed on a front surface of the substrate, a manifold for supplying ink to the ink chamber formed on a rear surface of the substrate, and an ink passage in flow communication with the ink chamber and the manifold formed parallel to the front surface of the substrate; a nozzle plate including a plurality of passivation layers formed of an insulating material on the front surface of the substrate, a heat dissipating layer formed of a metallic material, and a nozzle in flow communication with the ink chamber; and a heater and a conductor, the heater being positioned on the ink chamber and heating ink in the ink chamber, and the conductor for applying a current to the heater.

Abstract: A micro-pump includes a pumping chamber having a predetermined inner space to be filled with a fluid, at least one fluid entrance and at least one fluid exit, which are connected to the pumping chamber, a heating element provided at one side of the pumping chamber to generate bubbles in the pumping chamber by heating the fluid, and electrodes for applying current to the heating element, wherein the fluid is made to flow into or out of the pumping chamber by expansion and contraction of the bubbles, and wherein a cross-sectional area of at least one of the fluid entrance and the fluid exit varies along a direction in which the fluid flows. The micro-pump has a relatively simple structure, enhanced pumping efficiency and enhanced durability.

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: 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: An optical pickup having a blade including a first blade in which an objective lens is mounted and which is made of a reinforced plastics material, and a second blade in which driving coils are mounted and which is made of a magnesium alloy material. Since the first blade has a low thermal conductivity coefficient, the heat generated in the coils is prevented from being transferred to the objective lens, whereas the second blade having a high thermal conductivity coefficient radiates the heat generated by the coils to the outside. Thus, the heat distortion of the objective lens can be suppressed, and damages to the coils or rigidity reduction of the blade can be avoided.

Abstract: An ink jet printer head includes a substrate having a heat resisting body, an ink chamber barrier installed on the substrate so as to form a side wall of an ink chamber filled with ink introduced through an ink channel, and a nozzle plate having a nozzle hole communicating with the ink chamber and installed on the ink chamber barrier, and an ink separating wall protruding from a periphery of the nozzle hole towards the substrate located on the ink channel to interrupt a flow of the ink is provided in the nozzle plate. The backflow of the ink into the interior of the ink channel and an ink tail generated in the nozzle and a satellite droplet are reduced by using the ink separating wall, thereby improving printing efficiency and printing quality.

Abstract: A print array head and a fabrication method thereof. The print array head includes a positioning means for aligning coordinates of a nozzle plate of a page width size with coordinates of a heater chip. The positioning means includes a pair of aligning holes formed on opposite sides of a nozzle section of the nozzle plate, and a pair of aligning marks formed on of a recess of the heater chip. Since the nozzle plate and the heater chip are aligned with each other through observation of the aligning marks through the aligning holes, possible error between a desired an and actual attaching location of the heater chip with respect to the nozzle plate is minimized, and accordingly, printing quality and productivity are increased, while the fabricating costs are decreased.

Abstract: A print array head and a fabrication method thereof. The print array head includes a positioning means for aligning coordinates of a nozzle plate of a page width size with coordinates of a heater chip. The positioning means includes a pair of aligning holes formed on opposite sides of a nozzle section of the nozzle plate, and a pair of aligning marks formed on of a recess of the heater chip. Since the nozzle plate and the heater chip are aligned with each other through observation of the aligning marks through the aligning holes, possible error between a desired an and actual attaching location of the heater chip with respect to the nozzle plate is minimized, and accordingly, printing quality and productivity are increased, while the fabricating costs are decreased.

Abstract: An ink jet printer head includes a substrate having a heat resisting body, an ink chamber barrier installed on the substrate so as to form a side wall of an ink chamber filled with ink introduced through an ink channel, and a nozzle plate having a nozzle hole communicating with the ink chamber and installed on the ink chamber barrier, and an ink separating wall protruding from a periphery of the nozzle hole towards the substrate located on the ink channel to interrupt a flow of the ink is provided in the nozzle plate. The backflow of the ink into the interior of the ink channel and an ink tail generated in the nozzle and a satellite droplet are reduced by using the ink separating wall, thereby improving printing efficiency and printing quality.

Abstract: An ink jetting apparatus includes a nozzle module, a driving module, and a membrane. The nozzle module includes an ink chamber for reserving ink, and a nozzle hole for permitting ink in the ink chamber to be jetted therethrough. The driving module includes a working fluid chamber charged with working fluid, a heater disposed in the working fluid chamber, and a plurality of fins fixed to the heater, which are heated by the heater. By pressure from a bubble produced during the heating of the working fluid chamber by the heater, the membrane is curved into the ink chamber, and ink in the ink chamber is jetted through the nozzle hole. Since the bubble is divided by a plurality of fins on the heater, the bubbles disappear rapidly when the heater stops heating. Accordingly, the high-speed operation of the ink jetting apparatus becomes possible, and the ink jetting apparatus is more stably driven.