| 摘要 |
PURPOSE:To perform high quality image recording by reducing irregularity in the flight of liquid droplets between emitting orifices, by specifying the cross- sectional area of each of liquid supply ports provided in a ratio of at least one or more per 100 emitting orifices. CONSTITUTION:When the numbers of the supply port 108 which are provided to a substrate 101 by drilling and connect a first liquid chamber 110 and a second liquid chamber 119 is provided in a ratio of less than one per 100 emitting ports 108, if the size of each supply port 118 is sufficiently large, large difference is generated in the frequency limit between the orifices by the difference of a place where the orifice is positioned. In order to reduce this emitting irregularity between the orifices, the supply port is pref. provided in a ratio of one or more per 32 orifices. In addition, the cross-sectional area Sh of the supply port 118 is set to the size satisfying the formula. The length Ln of a liquid flowline 21 means the distance from the boundary of the common liquid chamber part of the first liquid chamber and the liquid flowline to the center of the orifice 108. |
