Ink jet printhead that incorporates through-chip ink flow control

Abstract

An ink jet printhead chip that is the product of an integrated circuit fabrication technique includes a wafer substrate having a front surface and a rear surface. A plurality of ink passages are defined through the wafer substrate, so that each ink passage defines an inlet at a rear surface of the wafer substrate and an outlet at a front surface of the wafer substrate. Each ink passage is in fluid communication with an ink supply at the rear surface of the wafer substrate. A plurality of closure members is positioned on the rear surface of the substrate and each closure member is displaceable between open and closed positions to control a flow of ink through each passage.

Dependencies are inferred from the claim text.