Liquid ejection head
AssigneeCanon Kabushiki Kaisha
InventorHikaru Sugimoto
Life of this patent
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Abstract
A liquid ejection head includes a substrate, and a member provided on the substrate. The member has an ejection orifice or ejection orifices formed therein to eject a liquid. The member is formed of a water repellent layer having a multilayer structure including a first water repellent layer as an outermost layer and a second water repellent layer provided directly below the first water repellent layer. The first water repellent layer has a water contact angle of 80° or more, while the second water repellent layer has a flexural modulus of 3 to 7 GPa or a hardness of 0.18 to 0.30 GPa.
Claims8
A liquid ejection head comprising a substrate, and a member provided on the substrate, the member having an ejection orifice formed therein to eject a liquid, wherein the member is formed of a water repellent layer having a multilayer structure, the water repellent layer including:
- a first water repellent layer, as an outermost layer, having a water contact angle of 80° or more, which is formed of a cured product of a first water repellent resin composition comprising a first water repellent resin and inorganic fine particles dispersed therein;
- and
- a second water repellent layer, as provided directly below the first water repellent layer, having a flexural modulus of 3 to 7 GPa or a hardness of 0.18 to 0.30 GPa, which is formed of a cured product of a second water repellent resin composition comprising a second water repellent resin.
A method for producing a liquid ejection head comprising a substrate and a member provided on the substrate, the member having an ejection orifice formed therein to eject a liquid, the member being formed of a water repellent layer having a multilayer structure, the water repellent layer including:
- a first water repellent layer, as an outermost layer, having a water contact angle of 80° or more, which is formed of a cured product of a first water repellent resin composition comprising a first water repellent resin and inorganic fine particles dispersed therein;
- and
- a second water repellent layer, as provided directly below the first water repellent layer, having a flexural modulus of 3 to 7 GPa or a hardness of 0.18 to 0.30 GPa, which is formed of a cured product of a second water repellent resin composition comprising a second water repellent resin,
- wherein the liquid ejection head further includes a lower resin layer provided between the second water repellent layer and the substrate, which is formed of a resin containing a molecule having an epoxy group, and
- wherein the method includes a step of laminating the second water repellent resin composition containing the second water repellent resin on the lower resin layer and then heating it.
Dependencies are inferred from the claim text.