Abstract: An inkjet printhead and fabrication method include integrating actuators and ink firing chambers on a single substrate, such as a semiconductor substrate. The integration process utilizes semiconductor-on-insulator (SOI) techniques in the preferred embodiment. Actuators are formed on one surface of the substrate, typically a silicon substrate, and firing chambers are aligned with the actuators. Electrical switching devices, such as transistors, are formed along the surface and are utilized to individually address the actuators. After the integrated structure is formed, a supply manifold may be attached to the structure for replenishing fluid ink following a firing operation. Optionally, a flow control mechanism, such as a valve, may be incorporated between the manifold and the firing chamber.

Abstract: An ink refilling container includes an ink containing portion for containing ink to refill, an ink injection tube for connection with the ink containing portion, an air vent, provided in the ink container, for communication with ambience, and an openable member for closing the air vent. A meniscus of ink is formed adjacent an end of the injection tube, and the ink is not leaked externally when the air vent is closed.

Abstract: An ink jet recording head comprises ink paths communicated with ink discharge ports for discharging ink, and heat generating portions arranged on the inner wall faces of the ink paths for generating thermal energy utilized for discharging ink from the discharge ports. For this ink jet recording head, liquid-repellent treatment is processed only on the regions that correspond to the heat generating portions of the inner wall faces of the ink paths. With the liquid-repellent treatment processed only on the regions corresponding to the heat generating portions on the inner wall faces of the ink paths, it is made difficult for the refractory substances that may be brought about by the decomposition of colorant or the like contained in ink to be fixed on the regions corresponding to the heat generating portions. As a result, the heat of each heat generating device is transferred to ink evenly to make stable ink discharges obtainable for the provision of recorded images in higher quality.

Abstract: There is provided an ink-jet printer for jetting ink drops through nozzle holes in which each of the nozzle holes is circular in section, a ratio a/d of a nozzle hole roundness of each of the nozzle holes a to a nozzle hole diameter of each of the nozzle holes d is not more than 0.2, and an amount of ink/jet which is jetted through each of the nozzles holes is not more than 20 pl. According to this ink-jet printer, a good printing quality can be obtained without impact-errors.

Abstract: A composition and a method and an apparatus for using the composition for secure thermal ink jet printing on a substrate. The thermal ink jet ink composition is clear and is invisible to an unaided human eye in visible light when printed on the substrate.