Liquid ejection substrate and liquid ejection head using same
AssigneeCanon Kabushiki Kaisha
InventorsTakaaki Yamaguchi, Yoshiyuki Imanaka, Koichi Omata, Kousuke Kubo
Life of this patent
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Abstract
A liquid ejection substrate used to eject a liquid includes a substrate having an element row including a plurality of elements provided in a row, where each of the elements generates energy, drive circuits that drive and control the elements, a signal line that is shared by and connected to the drive circuits, the signal line being provided along the element row, and a heating portion generating heat used to heat the substrate, wherein the heating portion is provided so that the heating portion does not overlap the signal line with reference to a direction perpendicular to a face of the substrate.
Claims13
A liquid ejection head substrate comprising:
- an element row including a plurality of elements that are provided in a row, where each of the elements generates energy used to eject a liquid;
- a plurality of drive circuits that is provided in correspondence with the plurality of elements, and that drives and controls the plurality of elements;
- a logic signal output unit configured to externally transmit a signal used to drive the plurality of elements;
- a signal line that connects the logic signal output unit to the plurality of drive circuits and that is provided along a direction in which the element row is provided;
- a substrate having a face provided with the element row, the plurality of drive circuits, the logic signal output unit, and the signal line;
- and
- a heating portion configured to generate heat used to heat the substrate,
- wherein the heating portion is provided so as not to overlap the signal line with reference to a direction perpendicular to the face, and provided on an area defined between the signal line and the element row so that the area and a part of the heating portion overlap each other.
A liquid ejection head substrate comprising:
- an element row including a plurality of elements that are provided in a row, where each of the elements generates energy used to eject a liquid;
- a plurality of drive circuits that is provided in correspondence with the plurality of elements, and that drives and controls the plurality of elements;
- a logic signal output unit configured to externally transmit a signal used to drive the plurality of elements;
- a signal line that connects the logic signal output unit to the plurality of drive circuits and that is provided along a direction in which the element row is provided;
- a heating portion configured to generate heat used to heat the substrate;
- and
- a substrate having a face provided with the element row, the plurality of drive circuits, the logic signal output unit, and the signal line,
- wherein an insulating layer is provided on the face of the substrate, and the signal line and the heating portion are provided on the insulating layer with reference to a direction perpendicular to the face, and
- wherein the heating portion is provided and extended in a direction parallel to the signal line with reference to a direction defined along the face of the substrate, and a ground shield line is provided between the heating portion and the signal line that are provided on the insulating layer with reference to the direction perpendicular to the face.
Dependencies are inferred from the claim text.