Recording element substrate and recording head

A recording head, comprising:

• a recording element substrate including a substrate and a channel-formation member;
• and
• a control unit configured to control driving of the recording element substrate;
• wherein a liquid chamber configured to accommodate a liquid is formed between the substrate and the channel-formation member,
• a discharge orifice configured to discharge the liquid accommodated in the liquid chamber is provided in the channel-formation member,
• the substrate includes at least a first layer, and a second layer that is farther away from a face on which the liquid chamber is formed than the first layer,
• a first heater configured to generate heat by application of a drive pulse, and to heat and discharge the liquid from the discharge orifice, and a temperature sensor that is disposed with at least a portion overlapping the liquid chamber in plan view, are provided in the first layer, and
• a second heater that is disposed with at least a portion overlapping the temperature sensor in plan view is provided in the second layer.