Liquid ejection head and method of manufacturing solution guide

1. A liquid ejection head that ejects droplets of a solution in which charged particles are dispersed by exerting electrostatic forces on the solution, comprising:

an insulative ejection substrate in which a plurality of through holes for the droplet ejection are formed;

ejection electrodes that are each arranged in correspondence with each of said through holes and exert the electrostatic forces on the solution; and

solution guides that pass through said through holes and protrude toward a droplet ejection side of said ejection substrate,

wherein said 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.

2. The liquid ejection head according to claim 1 ,

wherein said solution guides each have a shape that is gradually narrowed toward a tip end.

3. The liquid ejection head according to claim 1 ,

wherein said solution guides are each a member whose at least tip end side with respect to a corresponding ejection electrode is made of said composite material.

4. The liquid ejection head according to claim 1 ,

wherein the resin material is any one of a silicon resin, an epoxy resin, an urethane resin, a polyimide resin, and a phenol resin, and

the high-dielectric material is any one of PZT, PMN—PT, barium titanate, and strontium titanate.