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US 10,538,085 B2Granted
Liquid discharge head substrate, liquid discharge head, and method for disconnecting fuse portion in liquid discharge head substrate
AssigneeCanon Kabushiki Kaisha
InventorsYoshinori Misumi, Yuzuru Ishida, Maki Kato, Takahiro Matsui
Life of this patent
Estimating the term…
Abstract
Influence of transform of quality to an entire liquid discharge head is suppressed when a heat resistor and a covering portion are electrically connected to each other. To address this problem, a liquid discharge head substrate includes fuse portions for respective heat resistor arrays.
Claims10
A liquid discharge head substrate comprising:
- a first heat resistor array including a plurality of heat resistors;
- a second heat resistor array including a plurality of heat resistors which are arranged along the first heat resistor array;
- a plurality of first covering portions which have conductivity and which cover the respective heat resistors included in the first heat resistor array;
- a plurality of second covering portions which have conductivity and which cover the respective heat resistors included in the second heat resistor array;
- a first common line which is electrically connected to the plurality of first covering portions and which extends in a direction of the first heat resistor array;
- a second common line which is electrically connected to the plurality of second covering portions and which extends in a direction of the second heat resistor array;
- a third common line which is electrically connected to the first and second common lines;
- the first covering portions being insulated from the heat resistors covered by the first covering portions, and the second covering portions being insulated from the heat resistors covered by the second covering portions,
- a first fuse portion which connects an end portion of the first common line in the direction of the first heat resistor array to the third common line;
- and
- a second fuse portion which connects an end portion of the second common line in the direction of the second heat resistor array to the third common line.
8 more elements
A liquid discharge head, comprising:
- a liquid discharge head substrate including:
- a first heat resistor array including a plurality of heat resistors;
- a second heat resistor array including a plurality of heat resistors which are arranged along the first heat resistor array;
- a plurality of first covering portions which have conductivity and which cover the respective heat resistors included in the first heat resistor array;
- a plurality of second covering portions which have conductivity and which cover the respective heat resistors included in the second heat resistor array;
- a first common line which is electrically connected to the plurality of first covering portions and which extends in a direction of the first heat resistor array;
- a second common line which is electrically connected to the plurality of second covering portions and which extends in a direction of the second heat resistor array;
- a third common line which is electrically connected to the first and second common lines;
- the first covering portions being insulated from the heat resistors covered by the first covering portions, and the second covering portions being insulated from the heat resistors covered by the second covering portions,
- a first fuse portion which connects an end portion of the first common line in the direction of the first heat resistor array to the third common line;
- and
- a second fuse portion which connects an end portion of the second common line in the direction of the second heat resistor array to the third common line;
- and
- a member having discharge ports which discharge liquid and which are disposed so as to correspond to the heat resistors.
11 more elements
A method for disconnecting a fuse portion in a liquid discharge head substrate,
- the liquid discharge head substrate includes:
- a first heat resistor array having a plurality of heat resistors including a first heat resistor and a second heat resistor;
- a second heat resistor array including a plurality of heat resistors which are arranged along the first heat resistor array;
- a plurality of first covering portions which have conductivity and which cover the respective heat resistors included in the first heat resistor array;
- a plurality of second covering portions which have conductivity and which cover the respective heat resistors included in the second heat resistor array;
- a first common line which is electrically connected to the plurality of first covering portions;
- a second common line which is electrically connected to the plurality of second covering portions;
- a third common line which is electrically connected to the first and second common lines;
- a first fuse portion which connects the first common line and the third common line to each other;
- and
- a second fuse portion which connects the second common line and the third common line to each other,
- wherein the first covering portions are insulated from the heat resistors covered by the first covering portions, the second covering portions are insulated from the heat resistors covered by the second covering portions, and a first covering portion which covers the second heat resistor has lower electric resistance to the first fuse portion when compared with a first covering portion which covers the first heat resistor, the method comprising:
- when the first heat resistor is electrically connected to the first covering portion which covers the first heat resistor, applying a voltage to the second heat resistor and the second heat resistor is electrically connected to the first covering portion which covers the second heat resistor so that the first fuse portion is disconnected.
10 more elements
Dependencies are inferred from the claim text.