Compact inkjet substrate with centrally located circuitry and edge feed ink channels
First Claim
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1. A printing device including an inkjet printhead, said printhead comprising:
- a substrate includingan elongated edge portion including a plurality of ink firing chambers each having a firing element therein, as well as an ink feed channel;
a truncated end portion; and
a central interior portion having circuitry components for selectively actuating the firing elements in said firing chambers; and
mounting means for fixedly attaching said substrate to form said printhead;
wherein said elongated edge portion includes a first column of firing chambers extending in a longitudinal direction along a first edge of said substrate, and a second column of firing chambers extending in the longitudinal direction along a second edge of said substrate opposite said first edge;
wherein said ink feed channel includes a first ink feed slot communicating with said first column of firing chambers and a second ink feed slot communicating with said second column of firing chambers;
wherein said first and second ink feed slots extend from an underside of said substrate around said respective edges of said substrate to said first column and said second column of firing chambers, respectively.
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Abstract
An inkjet printhead includes a compact substrate having a pair of elongated edge portions for ink channel architecture, a central interior for substrate circuitry, and a pair of truncated end portions for mounting and for electrical interconnects. The ink channel architecture includes a plurality of ink vaporization chambers each having a firing resistor therein, as well as ink feed channels communicating through an ink passage from an underside of the substrate around both edges of the substrate to the vaporization chambers. The central interior portion excludes any ink channel architecture thereby enhancing the structural stability
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Citations
44 Claims
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1. A printing device including an inkjet printhead, said printhead comprising:
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a substrate including an elongated edge portion including a plurality of ink firing chambers each having a firing element therein, as well as an ink feed channel; a truncated end portion; and a central interior portion having circuitry components for selectively actuating the firing elements in said firing chambers; and mounting means for fixedly attaching said substrate to form said printhead; wherein said elongated edge portion includes a first column of firing chambers extending in a longitudinal direction along a first edge of said substrate, and a second column of firing chambers extending in the longitudinal direction along a second edge of said substrate opposite said first edge; wherein said ink feed channel includes a first ink feed slot communicating with said first column of firing chambers and a second ink feed slot communicating with said second column of firing chambers; wherein said first and second ink feed slots extend from an underside of said substrate around said respective edges of said substrate to said first column and said second column of firing chambers, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A printing device including an inkjet printhead, said printhead comprising:
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a substrate including an elongated edge portion including a plurality of ink firing chambers each having a firing element therein, as well as an ink feed channel; a truncated end portion; and a central interior portion having circuitry components for selectively actuating the firing elements in said firing chambers; and mounting means for fixedly attaching said substrate to form said printhead; wherein said truncated portion includes interconnects for said circuitry components to a printer. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A printing device including an inkjet printhead having a plurality of firing chambers, said printhead comprising:
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a substrate having elongated edge portions cut from a wafer, said edge portions defining ink feed channels for passing ink from an underside of the substrate around both edges of the substrate to said firing chambers, said substrate having a central interior portion excluding said ink feed channels and including multiplexing circuitry; and interconnects on said substrate and connected to said multiplexing circuitry for receiving signal transmission from a printer to selectively activate individual firing elements in each firing chamber, wherein the number of interconnects is less than the number of firing chambers. - View Dependent Claims (38, 39, 40, 41, 42)
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43. A plurality of inkjet printhead substrates produced from a silicon wafer or the like, wherein an ink feed channel on each of said substrates is defined in part by an edge of each substrate, said edge being a portion of a peripheral boundary of a die cut from the wafer.
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44. An inkjet printer comprising:
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a carriage for traversing across media to be printed upon and supporting a print cartridge; first circuitry for providing electrical signals to contact pads on said print cartridge; a printhead contained within said print cartridge supported by said carriage, said printhead having a plurality of firing chambers and further comprising; a substrate having elongated edge portions cut from a wafer, said edge portions defining ink feed channels for passing ink from an underside of the substrate around both edges of the substrate to said firing chambers, said substrate having a central interior portion excluding said ink feed channels and including multiplexing circuitry; and interconnects on said substrate and connected to said multiplexing circuitry for receiving said electrical signals from said printer to selectively activate individual firing elements in each firing chamber, wherein the number of interconnects is less than the number of firing chambers.
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Specification