Patent ID: 7896475

Claim:
An element substrate comprising: a first printing element array and a second printing element array each formed of a plurality of printing elements for discharging a liquid by substantially the same liquid discharge amount; a third printing element array formed of printing elements which discharge the liquid by a discharge amount different from the discharge amount of the printing elements of the first and second printing element arrays and are staggered from the printing elements of the second printing element array; a first driver array formed of a plurality of driving elements arranged near the first printing element array, a second driver array formed of a plurality of driving elements arranged near the second printing element array, and a third driver array formed of a plurality of driving elements arranged near the third printing element array, the second driver array and the third driver array forming a single array; a first power supply wiring pattern arranged at a position where the first power supply wiring pattern overlaps an area where the first driver array is arranged, and in a different layer; and a second power supply wiring pattern arranged in the layer and at a position where the second power supply wiring pattern overlaps an area where the second driver array and the third driver array are arranged, wherein an array density of the driving elements of the first driver array is lower than an array density of the driving elements of the single array formed from the second driver array and the third driver array, an area of each of the driving elements of the first driver array is larger than an area of each of the driving elements of the second driver array and is larger than an area of each of the driving elements of the third driver array, and a wiring width of the first power supply wiring pattern in a direction perpendicular to the printing element arrays is smaller than a wiring width of the second power supply wiring pattern.