Patent ID: 8544977

Claim:
A liquid discharge head comprising: a substrate including a plurality of nozzle arrays, each of which is formed by arranging nozzles having heat generating elements generating thermal energy for discharging a liquid, and a plurality of common liquid chambers formed along the plurality of nozzle arrays to supply the liquid to the plurality of nozzle arrays, the substrate being divided into a plurality of substrate portions by the plurality of common liquid chambers, wherein the substrate includes a first substrate portion having a first nozzle array among the plurality of nozzle arrays and a second substrate portion having a second nozzle array different from the first nozzle array and a thermal capacity larger than that of the first substrate portion, wherein a heating area of a first heat generating element provided in the first nozzle array is smaller than that of a second heat generating element provided in the second nozzle array, and wherein an amount of the liquid discharged from a nozzle of the second nozzle array is at least 0.7 times and no more than 1.3 times an amount of the liquid discharged from a nozzle of the first nozzle array.