Patent ID: 8500250

Claim:
A liquid discharge head comprising: a recording element substrate configured to include a plurality of energy generation elements configured to generate energy used for discharging a liquid and a plurality of electric connection units electrically connected to the plurality of energy generation elements; and an electric wiring member configured to include a plurality of input terminals electrically connectable to an external electric connection unit, a plurality of wirings sandwiched between films and electrically connected to the plurality of input terminals, and a plurality of lead lines conducted to the plurality of wirings, extending to the outside from between the films, and electrically connected to the plurality of electric connection units, wherein the plurality of wirings is configured to include a power line for supplying power to the energy generation elements and a signal line for supplying a signal to the energy generation elements, and configured to satisfy relationships of A>B and B<D, in which A is a largest width of the signal line, B is a largest width of the lead line connected to the signal line, and D is a largest width of the lead line connected to the power line.