Liquid ejection head
AssigneeCanon Kabushiki Kaisha
InventorsMasahiko Kubota, Masashi Miyagawa
Life of this patent
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Abstract
A liquid ejection head has an element substrate on which a plurality of heaters for generating energy for ejecting liquid droplets are disposed, a nozzle forming member laminated on the main surface of the element substrate and including a plurality of nozzles each having an ejection port for ejecting liquid droplets, a bubble forming chamber in which bubbles are formed by a heater, and a supply path for supplying liquid from a supply chamber to the bubble forming chamber. The nozzle forming member has a portion located in the vicinity of the heaters on the supply path side where the height of the nozzles is reduced, whereby the height of the nozzles changes toward the supply chamber.
Claims13
1-33. (canceled)
A liquid ejection head comprising:
- an energy generation element for generating energy for ejecting liquid droplets;
- a chamber having said energy generation element;
- a supply path communicating with said chamber for supplying a liquid to said chamber;
- an ejection port facing a surface on which said energy generation element is disposed;
- and
- an ejection portion having said ejection port,
- wherein said ejection portion comprises a first portion communicating with said ejection port and a second portion communicating with said first portion and said chamber,
- wherein said first portion, said second portion and said chamber are respectively connected in a stair-like pattern, and
- wherein AC>Ae2>Ae1, where Ac=a cross-sectional area of said chamber, the cross-sectional area being parallel to the surface on which said energy generation element is disposed, Ae2=a cross-sectional area of said second portion, the cross-sectional area being parallel to the surface on which said energy generation element is disposed, and Ae1=a cross-sectional area of said first portion, the cross-sectional area being parallel to the surface on which said energy generation element is disposed.
Dependencies are inferred from the claim text.