Patent ID: 7219971

Claim:
An ink jet recording method for ejecting ink, said method using an ink jet head substrate provided with a heat generating resistor, the heat generating resistor being coated with a protection film, wherein the ink is ejected by a pressure produced by generation of a bubble, the bubble being created by film boiling the ink by applying thermal energy to the ink through the protection film, the thermal energy being generated by a driving signal to the heat generating resistor, said method further comprising: providing a recording mode in which the ink is ejected, the ink having a maximum temperature at the surface of the protection film , which is in contact with the ink, of not higher than 560° C; controlling the maximum temperature applied to the ink by controlling a pulse width of the driving signal applied to the heat generating resistor; and measuring a temperature of the substrate, wherein the driving signal to the heat generating resistor is stopped when a discrimination is made that the maximum temperature may exceed 560° C., based on the temperature of the ink and the driving signal.