US Patent 7278714 Liquid ejection head and method of manufacturing solution guide

Provided is a liquid ejection head for electrostatic ink jet capable of ejecting ink droplets at a low voltage and at high speed. The liquid ejection head includes: an ejection substrate in which ejection openings are formed; ejection electrodes that respectively correspond to the ejection openings; and solution guides that pass through the ejection openings and protrude from the ejection substrate. The solution guides are each a member whose at least tip end portion is made of a composite material containing a resin material and particles of a high-dielectric material dispersed in the resin material.