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US 6,149,265 AGranted
Recording element unit, ink jet recording element unit, ink jet cartridge and ink jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorYasutomo Watanabe
Life of this patent
Estimating the term…
Abstract
It is intended to secure the space for the signal wirings in the manufacture of an ink jet recording element unit of a high density. In the manufacture of the ink jet recording element unit by providing, on a substrate, a plurality of recording elements each composed of an individual electrode, an electrothermal converting element, a common electrode and a return electrode, a notch portion is formed on the outer edge of the electrothermal converting member adjacent to the return electrode.
Claims7
A recording element unit having a substrate, said substrate comprising:
- plural heat generating resistance members having ends;
- individual wirings each of which is connected to an end of a respective one said heat generating resistance members;
- a common wiring connected in common to another end of each of said heat generating resistance members;
- and
- a return wiring connected to said common wiring and provided along said individual wirings,
- wherein a center line of at least one of said heat generating resistance members provided near said return wiring is shifted toward said return wiring, with respect to a center line of the individual wiring connected to said heat generating resistance member, and wherein the center lines of those ones of the heat generating resistance members which are located closer to said return wiring are shifted by greater amounts than center lines of heat generating resistance members which are not located as close to said return wirings.
3 more elements
Dependencies are inferred from the claim text.