Patent ID: 9254658
Filing Date: 2016-02-09
CPC Classification: B41J

Claim Text:
1. A liquid ejection head, comprising: a first support member including a flow path for supplying liquid and an opening communicating with the flow path; at least one second support member including an individual liquid chamber communicating with the opening, the at least one second support member being arranged on the first support member along the flow path; and a recording element substrate including an energy-generating element for generating energy to be used for ejecting the liquid, and a supply port for supplying the liquid to the energy-generating element, the supply port communicating with the individual liquid chamber, the recording element substrate being supported by a back surface of the at least one second support member with respect to an opposite surface thereof facing the first support member, wherein when energy to be input per ejection liquid droplet volume in the energy-generating element is defined as P (μJ/pL), a thermal resistance R (K/W) of a shortest heat transfer path of the at least one second support member between the recording element substrate and the first support member satisfies the following expression: