| 摘要 |
A driving voltage of a discharging heater in an ink jet recording head is set according to property of the individual recording head. More specifically, sub-heaters (102, 103) are formed on a board on which discharging heaters (101) are formed, by a same process as that for the discharging heaters. Resistance values of the sub-heaters (102, 103) are read so that the driving voltage of the discharging heaters (101) can be set on the basis of the read resistance values. <IMAGE> |
