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AssigneeCanon Kabushiki Kaisha
InventorsIchiro Saito, Masahiko Ogawa, Teruo Ozaki, Masahiko Kubota, Muga Mochizuki
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A base member for an ink jet head, the base member comprising a substrate, a heat generating resistor provided between electrodes which constitute a pair on the substrate an upper protection layer provided on an insulation layer which in turn is provided on the heat generating resistor, the upper protection layer having a contact surface contactable to ink, the improvement residing in that the upper protection layer is made of amorphous alloy having a following composition formula: TaαFeβNiγCrδ where 10 atomic %≦α≦30 atomic %, α+β<80 atomic % α<β, δ>γ and, α+β+γ+δ=100 atomic %, and, at least the contact surface of the upper protection layer contains an oxide of a constituent component.
A base member for an ink jet head, said base member comprising a substrate, a heat generating resistor provided between electrodes which constitute a pair on said substrate an upper protection layer provided on an insulation layer which in turn is provided on the heat generating resistor, said upper protection layer having a contact surface contactable to ink, in the improvement residing in that
An inkjet head comprising an ejection outlet for ejecting liquid, a liquid flow path having a portion for applying to the liquid thermal energy for ejecting the liquid, a heat generating resistor for generating the thermal energy and an upper protection layer covering the heat generating resistor with an insulation layer therebetween, the improvement residing in that
Dependencies are inferred from the claim text.