Patent ID: 6488359
Filing Date: 2002-12-03
Classification: B41J,B82Y,G06F,G06K,G11C,H04N

Abstract:
An ink jet printhead chip that is the product of an integrated circuit fabrication technique, the printhead chip comprisinga wafer substrate having a front surface and a rear surface, a plurality of ink passages being defined through the wafer substrate, so that each ink passage defines an inlet at the rear surface of the wafer substrate and an outlet at the front surface of the wafer substrate, each ink passage being in fluid communication with an ink supply at the rear surface of the wafer substrate; a plurality of closure members corresponding to respective passages, the closure members being positioned on the rear surface of the substrate and being displaceable between open and closed positions to control a flow of ink through each passage; and a plurality of actuators that are positioned on the rear surface of the wafer substrate and are operatively engaged with the closure members to displace the closure members between the open and closed positions, when activated.