초록 ▼

An inkjet printhead includes a compact substrate having transmission circuitry such as actuation signal lines and address circuitry and ground lines in connection with resistors in a plurality of vaporization chambers on the substrate, with a minimal number of interconnect junctions located at both

An inkjet printhead includes a compact substrate having transmission circuitry such as actuation signal lines and address circuitry and ground lines in connection with resistors in a plurality of vaporization chambers on the substrate, with a minimal number of interconnect junctions located at both ends of the substrate. A print cartridge holding the inkjet printhead has a flexible circuit member with conductive traces permanently bonded at one end to the interconnect junctions and terminating at the other end at cartridge interconnect pads.

대표청구항 ▼

A printhead member having an array of inkjet nozzle orifices in fluid communication with an ink reservoir, with the array extending a distance in a given longitudinal direction, comprising: a substrate having end-portions spaced apart in the longitudinal direction at opposite ends of the substrate,

A printhead member having an array of inkjet nozzle orifices in fluid communication with an ink reservoir, with the array extending a distance in a given longitudinal direction, comprising: a substrate having end-portions spaced apart in the longitudinal direction at opposite ends of the substrate, a plurality of actuation elements and a plurality of ink election chambers which are respectively aligned with the nozzle orifices, each of said ink ejection chambers containing at least one of said actuation elements for propelling ink through its respective nozzle orifice; a plurality of ink channels in fluid communication with said ink ejection chambers for supplying ink from the ink reservoir; first circuitry on said substrate connected to said actuation elements and having a plurality of interconnect junctions located only at said end-portions of the substrate; and second circuitry on said printhead member and connected to said first circuitry through said interconnect junctions for carrying a plurality of actuation signals to said actuation elements, said second circuitry having transmission circuitry including a given number of actuation lines which are connected to said first circuitry through said interconnect junctions, wherein said substrate includes a given number of ink ejection chambers, wherein said first circuitry includes demultiplexing means connected between said interconnect junctions and said actuation elements in said given number of ink ejection chambers, and wherein said given number of actuation lines is less than said given number of ink ejection chambers.