RECORDING ELEMENT SUBSTRATE, LIQUID DISCHARGE HEAD, AND LIQUID DISCHARGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a recording element substrate making it possible to detect a temperature of the recording element substrate with high accuracy, and making it possible to prevent the recording element substrate from becoming large.SOLUTION: When disposing sensors along a heating resistor element arranged on a recording element substrate, diode sensors are disposed at a higher density in a region of the recording element substrate which is subjected to a larger temperature change rate in a discharge operation for liquid from a discharge port.SELECTED DRAWING: Figure 3