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US 7,677,696 B2Granted
Liquid discharge head
AssigneeCanon Kabushiki Kaisha
InventorKoji Kitani
Life of this patent
Estimating the term…
Abstract
In order to suppress peeling of a film formed on a base, and improve the durability and reliability of the film, an overhang is provided on a side surface of a sacrifice layer, whereby a film is formed, which has an edge portion having a thickness distribution, in which a thickness is gradually decreased to substantially zero at an edge of a formed film.
Claims1
A liquid discharge head, comprising:
- an energy generator which is provided on a substrate and generates energy used for discharging a liquid:
- a wiring connected to the energy generator;
- an insulating protective film which covers the energy generator and the wiring;
- an adhesion layer provided on the insulating protective film;
- and
- an endurance protective film provided on the adhesion layer, wherein:
- the endurance protective film has a center portion having a predetermined thickness and an edge portion having a thickness distribution in which a thickness is gradually decreased from the predetermined thickness to substantially zero at an edge of the film;
- and
- the edge portion covers an end portion of the adhesion layer.
6 more elements
Dependencies are inferred from the claim text.