Patent ID: 6652068
Filing Date: 2003-11-25
Classification: B41J

Abstract:
An ink jet printhead comprising:a substrate, wherein a first central ink flow channel is formed within the substrate, and a first periphery ink flow channel is formed at an edge of the substrate, the first central ink flow channel having a first central opening on an upper surface of the substrate, a second central ink flow channel and a second central opening connected thereto being formed within the substrate; and a nozzle layer positioned above the substrate, wherein a plurality of first chambers, a plurality of second chambers, and a plurality of fifth chambers are formed between the upper surface of the substrate and the nozzle layer, the first chambers are positioned adjacent to the first central ink flow channel, the second chambers are positioned adjacent to the first periphery ink flow channel, and the fifth chambers are positioned adjacent to the second central ink flow channel and the second central opening; wherein ink flows through the first central ink flow channel and the first central opening to be delivered to the first chambers, and ink flows in a single direction through the first periphery ink flow channel to be delivered to the second chambers.