Liquid ejection head substrate, liquid ejection head, and liquid ejection apparatus

A liquid ejection head including a liquid ejection head substrate capable of ejecting liquid using energy generated by an energy generating element, the liquid ejection head substrate comprising:

• a base;
• a first heat transfer layer configured to be installed below the energy generating element, and formed by being laminated on the base via an insulating layer;
• a temperature adjustment heating element configured to be capable of adjusting the temperatures of the liquid and the liquid ejection head substrate;
• and a first heat transfer member configured to connect the first heat transfer layer and the base, wherein the first heat transfer member is installed between adjacent ones of a plurality of the energy generating elements and between the energy generating element and the temperature adjustment heating element.

A liquid ejection apparatus including a liquid ejection head equipped with a liquid ejection head substrate capable of ejecting liquid using energy generated by an energy generating element, the liquid ejection head substrate comprising:

• a base;
• a first heat transfer layer configured to be installed below the energy generating element, and formed by being laminated on the base via an insulating layer;
• a temperature adjustment heating element configured to be capable of adjusting the temperatures of the liquid and the liquid ejection head substrate;
• and a first heat transfer member configured to connect the first heat transfer layer and the base, wherein the first heat transfer member is installed between adjacent ones of a plurality of the energy generating elements and between the energy generating element and the temperature adjustment heating element.