Segmented inkjet print head experiment

Inkjet print heads are commonly designed with a single ink reservoir for each color, distributing ink to all the nozzles of the same color. This design is conceptually limiting the increment of the number of nozzles and the print head size, since the distribution means become complicated as the number of nozzles increases. In order to enable enlargement of the print head a different approach is suggested and tested experimentally. The print head is divided to small segments; each one is autonomous, and not fluid-connected to the neighboring segment. Each segment contains a micro reservoir and one or few nozzles. The segments are manufactured in close proximity to each other enabling area coverage. A segmented print head was built and tested. The micro reservoir ink filling method and operation of the segments were experimentally proven. Ink drops were obtained and lifetime of the resistors was measured. Electrical characteristics of power and energy for proper operation are also obtained.