Semiconductor device, liquid discharge head, and liquid discharge apparatus
AssigneeCanon Kabushiki Kaisha
InventorKazunari Fujii
Life of this patent
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Abstract
A semiconductor device used for a liquid discharge head includes first heaters configured to apply energy to a liquid, second heaters whose resistance values are to be measured, switch elements, and first and second lines. Each of the second heaters is connected in series with a corresponding one of the switch elements between the first line and the second line. The second heaters have shapes different in at least one of length or width. A connection destination of at least one of two terminals of each of the first heaters is different from connection destinations of two terminals of each of the second heaters.
Claims18
A semiconductor device used for a liquid discharge head, the device comprising:
- a plurality of first heaters configured to apply energy to a liquid;
- a plurality of second heaters whose resistance values are to be measured;
- a plurality of switch elements;
- a first line;
- and
- a second line,
- wherein each of the plurality of second heaters is connected in series with a corresponding one of the plurality of switch elements between the first line and the second line,
- the plurality of second heaters have a plurality of shapes different in at least one of length in a current flowing direction or width in a direction crossing the current flowing direction, and
- a connection destination of at least one of two terminals of each of the plurality of first heaters is different from connection destinations of two terminals of each of the second heaters.
A semiconductor device used for a liquid discharge head, the device comprising:
- a plurality of first heaters configured to apply energy to a liquid;
- a plurality of second heaters whose resistance values are to be measured;
- a plurality of switch elements;
- a first line;
- and
- a second line,
- wherein each of the plurality of second heaters is connected in series with a corresponding one of the plurality of switch elements between the first line and the second line,
- the plurality of second heaters have a plurality of shapes different in at least one of width or length,
- the plurality of first heaters are arranged in a first direction,
- the plurality of second heaters are arranged in the first direction, and
- the plurality of second heaters are located in a second direction crossing the first direction with respect to a region where the plurality of first heaters are arranged.
A semiconductor device used for a liquid discharge head, the device comprising:
- a plurality of first heaters configured to apply energy to a liquid;
- a plurality of second heaters whose resistance values are to be measured;
- a plurality of switch elements;
- a first line;
- and
- a second line,
- wherein each of the plurality of second heaters is connected in series with a corresponding one of the plurality of switch elements between the first line and the second line,
- the plurality of second heaters have a plurality of shapes different in at least one of width or length, and
- the plurality of second heaters include a heater different from one of the plurality of first heaters at least in one of width and length by not less than 10% of that of the one of the plurality of first heaters.
Dependencies are inferred from the claim text.