| 摘要 |
The present invention provides a liquid ejection head that can stabilize the liquid ejecting direction, against various variation such as foaming variation under a high driving frequency, or proprietary variation for respective ejection opening in the manufacturing stage. This liquid ejection head (100) includes an ejection opening portion (40) provided with an ejection opening (32) to eject liquid; a liquid passage (38) to communicate with the ejection opening portion (40) and to introduce liquid to the ejection opening portion (40); and an electrothermal converting element (31) disposed at the liquid passage (38), for generating thermal energy to be used for ejecting liquid from the ejection opening (32); and causes liquid state change by applying thermal energy to the liquid, generates bubble, and eject liquid by the pressure of thus generated bubble, eject liquid in the volume reduction stage after the bubble has grown to its maximum volume, and is provided with a plurality of grooves distributed in respect of the ejection opening center (O) and extending in the liquid ejecting direction. <IMAGE> |
