Patent ID: 6988782

Claim:
A recording apparatus comprising: a recording head including a semiconductor substrate in which is formed a heat generating resistor for converting electric energy into thermal energy, for providing a liquid with the thermal energy to generate a bubble in the liquid, thereby discharging the liquid for recording on a recording medium; and a control circuit which controls said recording head, at the discharge of the liquid, in such a manner as to apply a first pulse voltage to said heat generating resistor to heat the liquid in the vicinity of said heat generating resistor and, after a lapse of a predetermined time, to apply a second pulse voltage to said heat generating resistor to generate the bubble, thereby discharging the liquid, and which sets a pulse width of the first pulse voltage, a pulse width of the second pulse voltage and the predetermined time by referring to a rank table showing a relationship between a resistance of a rank resistor corresponding to a resistance of said heat generating resistor and the pulse width of the first pulse voltage, the predetermined time and the pulse width of the second pulse voltage; wherein said control circuit sets the pulse width of the first pulse voltage, based on the rank table in which the pulse width of the first pulse voltage is set in such a manner that a maximum reached temperature of a surface of said heat generating resistor at an application of the first pulse voltage becomes higher as the resistance of said rank resistor becomes smaller.