Patent ID: 8678554

Claim:
A liquid discharge head substrate comprising: a first element array and a second element array provided by arraying a plurality of energy generating element configured to generate energy for discharging liquid by energizing, the first element array and the second element array being provided along each other; a plurality of connection lines configured to energize the plurality of energy generating elements, each of the connection lines being connected to two or more energy generating elements of the plurality of energy generating elements, and being provided in a region between adjacent energy generating elements, wherein a spacing between adjacent energy generating elements between which the connection line is provided is wider than a spacing between adjacent energy generating elements between which the connection line is not provided, and wherein a region between adjacent energy generating elements of the first element array, between which the connection line is not provided, is positioned so as to be overlapped with a region between adjacent energy generating elements of the second element array, between which the connection line is provided, with respect to an orthogonal to a direction in which the plurality of energy of generating elements of the element arrays is arrayed.