Patent ID: 7207660

Claim:
An electrostatic ink jet head that causes an electrostatic force to act on ink obtained by dispersing particles in a solvent so that liquid droplets containing said particles fly toward a liquid droplet reception member, said electrostatic ink jet head comprising: a head substrate; an insulating substrate which is arranged apart from said head substrate at a predetermined distance and has at least one through hole, wherein an ink passage is formed between said insulating substrate and said head substrate; ink supply means for supplying said ink to said ink passage; a control electrode provided to said insulating substrate so as to surround said through hole and applied a first signal in order to control ejection of said liquid droplets; and meniscus control means for controlling fixing of an edge portion of an ink meniscus formed in proximity to said through hole or within said through hole, applied a second signal that is different from said first signal, wherein said meniscus control means fixes the edge portion of said ink meniscus by increasing at least one of a contact angle of said ink meniscus and viscosity of said ink.