Liquid ejection head substrate and liquid ejection head
AssigneeCanon Kabushiki Kaisha
InventorsYuuji Tamaru, Yoshiyuki Imanaka, Koichi Omata, Hideo Tamura
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Abstract
A liquid ejection head substrate includes a primary conductive layer; an insulating layer; a pair of secondary conductive layers; a first connecting portion where the primary conductive layer is electrically connected to the secondary conductive layers, the first connecting portion penetrating the insulating layer; and a second connecting portion whose contact area is smaller than that of the first connecting portion. In the secondary conductive layers, a voltage is applied such that a first secondary conductive layer has a higher potential than a second secondary conductive layer.
Claims13
A liquid ejection head substrate comprising:
- a substrate on which a primary conductive layer, an insulating layer, and first and second secondary conductive layers are stacked in sequence in that order;
- a first connecting portion where the primary conductive layer contacts the first secondary conductive layer, the first connecting portion penetrating the insulating layer;
- and
- a second connecting portion where the primary conductive layer contacts the second secondary conductive layer, the second connecting portion penetrating the insulating layer,
- wherein a contact area where the primary conductive layer contacts the second secondary conductive layer in the second connecting portion is smaller than a contact area where the primary conductive layer contacts the first secondary conductive layer in the first connecting portion, and
- wherein when a voltage is applied, the first secondary conductive layer has a higher potential than the second secondary conductive layer.
A liquid ejection head substrate comprising:
- a substrate on which first and second primary conductive layers, an insulating layer, and a secondary conductive layer are stacked in sequence in that order;
- a first connecting portion where the first primary conductive layer is electrically connected to the secondary conductive layer, the first connecting portion penetrating the insulating layer;
- and
- a second connecting portion where the second primary conductive layer is electrically connected to the secondary conductive layer, the second connecting portion penetrating the insulating layer,
- wherein a contact area where the second primary conductive layer contacts the secondary conductive layer in the second connecting portion is smaller than a contact area where the first primary conductive layer contacts the secondary conductive layer in the first connecting portion, and
- wherein when a voltage is applied between the primary conductive layers, the second primary conductive layer has a higher potential than the first primary conductive layer.
Dependencies are inferred from the claim text.