Patent ID: 7967421

Claim:
A method for manufacturing an ink jet print head that is able to eject ink droplet droplets utilizing heat generated by heating resistors, the method comprising the steps of: forming, as the heating resistors, first and second heating resistors on the same substrate, each of the first and second heating resistors being made of a material having a sheet resistance value able to be varied depending on energy; and adjusting the sheet resistance value of at least one of the first and second heating resistors by an anneal process so that the sheet resistance values of the first and second heating resistors are set at different values, wherein the first heating resistor allows a larger ink droplet to be ejected, and the second heating resistor allows a smaller ink droplet to be ejected, and the anneal process makes adjustment such that the sheet resistance value of the first heating resistor is smaller than that of the second heating resistor.