LIQUID EJECTION HEAD SUBSTRATE, METHOD OF MANUFACTURING LIQUID EJECTION HEAD SUBSTRATE, AND LIQUID EJECTION HEAD
First Claim
1. A liquid ejection head substrate comprising:
- a base including a surface in which a first heat generation element and a second heat generation element that generate heat to eject liquid are provided;
a conductive first covering portion that covers the first heat generation element,a conductive second covering portion that covers the second heat generation element;
an insulating layer disposed between the first heat generation element and the first covering portion, and between the second heat generation element and the second covering portion;
a fuse portion;
first wiring electrically connected to the first covering portion through the fuse portion, the first wiring electrically connecting the first covering portion and the second covering portion to each other;
a terminal electrically connected to the first covering portion and the second covering portion through the first wiring;
second wiring provided at a position different from that of the first wiring in an orthogonal direction with respect to the surface of the base; and
a plurality of electric connection portions provided between the fuse portion and the terminal in a path of current passing through the first wiring, the plurality of electric connection portions connecting the first wiring and the second wiring to each other in parallel.
1 Assignment
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Accused Products
Abstract
A liquid ejection head substrate including a base including a surface having a first and second heat generation elements, a conductive first covering portion, a conductive second covering portion, an insulating layer disposed between the first heat generation element and the first covering portion, and between the second heat generation element and the second covering portion, a fuse portion, first wiring electrically connected to the first covering portion through the fuse portion, the first wiring electrically connecting the first covering portion to the second covering portion, a terminal electrically connected to the first covering portion and the second covering portion through the first wiring, second wiring, and electric connection portions provided between the fuse portion and the terminal in a current path passing through the first wiring, the electric connection portions parallelly connecting the first and second wiring to each other.
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Citations
21 Claims
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1. A liquid ejection head substrate comprising:
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a base including a surface in which a first heat generation element and a second heat generation element that generate heat to eject liquid are provided; a conductive first covering portion that covers the first heat generation element, a conductive second covering portion that covers the second heat generation element; an insulating layer disposed between the first heat generation element and the first covering portion, and between the second heat generation element and the second covering portion; a fuse portion; first wiring electrically connected to the first covering portion through the fuse portion, the first wiring electrically connecting the first covering portion and the second covering portion to each other; a terminal electrically connected to the first covering portion and the second covering portion through the first wiring; second wiring provided at a position different from that of the first wiring in an orthogonal direction with respect to the surface of the base; and a plurality of electric connection portions provided between the fuse portion and the terminal in a path of current passing through the first wiring, the plurality of electric connection portions connecting the first wiring and the second wiring to each other in parallel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of manufacturing a liquid ejection head substrate including
a base including a first heat generation element and a second heat generation element that generate heat to eject liquid, a conductive first covering portion that covers the first heat generation element, a conductive second covering portion that covers the second heat generation element, an insulating layer disposed between the first heat generation element and the first covering portion, and between the second heat generation element and the second covering portion, a fuse portion, first wiring electrically connected to the first covering portion through the fuse portion, the first wiring electrically connecting the first covering portion and the second covering portion to each other, and a terminal electrically connected to the first covering portion and the second covering portion through the first wiring, the method of manufacturing a liquid ejection head substrate comprising; -
preparing the base provided with a second wiring on a surface thereof; forming the insulating layer so as to cover the second wiring; forming the first wiring on the insulating layer; and forming the plurality of electric connection portions in which at least a portion of each of the plurality of electric connection portions penetrate the insulating layer, in which the plurality of electric connection portions are provided between the fuse portion in the path of the current passing through the first wiring and the terminal, and in which the plurality of electric connection portions connect the first wiring and the second wiring to each other in parallel. - View Dependent Claims (16, 17)
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18. A liquid ejection head comprising:
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a liquid ejection head substrate including a base including a surface in which a first heat generation element and a second heat generation element that generate heat to eject liquid are provided, a conductive first covering portion that covers the first heat generation element, a conductive second covering portion that covers the second heat generation element, an insulating layer disposed between the first heat generation element and the first covering portion, and between the second heat generation element and the second covering portion, a fuse portion, first wiring electrically connected to the first covering portion through the fuse portion, the first wiring electrically connecting the first covering portion and the second covering portion to each other, and a terminal electrically connected to the first covering portion and the second covering portion through the first wiring; and a flow passage forming member provided on a first covering portion side of the liquid ejection head substrate, the flow passage forming member forming, together with the liquid ejection head substrate, a flow passage through which the liquid is made to flow, wherein the liquid ejection head substrate includes second wiring provided at a layer different from that of the first wiring in an orthogonal direction with respect to the surface of the base, and a plurality of electric connection portions provided between the fuse portion and the terminal in a path of current passing through the first wiring, the plurality of electric connection portions connecting the first wiring and the second wiring to each other in parallel. - View Dependent Claims (19, 20, 21)
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Specification