Print element substrate, liquid discharge head, and liquid discharge apparatus
AssigneeCanon Kabushiki Kaisha
InventorsRyoji Oohashi, Yoshinori Misumi, Yuzuru Ishida, Tsubasa Funabashi, Maki Kato
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Abstract
In a layer including print elements and a layer below the layer including the print elements in a lamination direction of a print element substrate, the print elements and drive circuits are arranged point-symmetrically about the center of the substrate viewed from a side where discharge ports that allow the liquid to be discharged are open, and in an upper layer over the layer including the print elements in the lamination direction, functional elements are arranged in a direction of liquid flow in which the liquid flows from supply ports to collection ports while passing above the print elements.
Claims12
A print element substrate comprising:
- a print element row group including at least one or more print element rows each including a plurality of print elements that are aligned in a first direction and allow a liquid to be discharged, supply ports that allow the liquid to flow into the print element substrate from outside, collection ports that allow the liquid to flow out to the outside, and drive circuits that drive the print elements, the print element rows being arranged in a second direction crossing the first direction;
- and
- two ends in the second direction each provided with external connection terminals that are electrically connected with the print elements,
- wherein a first region and a second region of the print element substrate each include the print element row group and the external connection terminals,
- the print element row group in the first region includes the print element row in which the drive circuit, the supply port, the print element, and the collection port are arranged in this order in the second direction from the first region to the second region, and
- the print element row group in the second region includes the print element row in which the supply port, the print element, the collection port, and the drive circuit are arranged in this order in the second direction from the first region to the second region.
Dependencies are inferred from the claim text.