Liquid ejection head and method of manufacturing the same

A liquid ejection head for ejecting droplets of a solution, in which charged particles are dispersed, by exerting electrostatic forces on the solution, comprising:

• an insulating ejection substrate in which through holes are bored to form ejection openings for ejecting the droplets;
• an insulating support substrate arranged while facing said ejection substrate with a predetermined distance therebetween;
• a solution flow path provided between said ejection substrate and said support substrate;
• ejection electrodes provided on the insulating ejection substrate, respectively around the through holes, for exerting the electrostatic forces on the solution;
• and
• a shield electrode provided on the insulating ejection substrate, corresponding to at least one of the through holes on a solution ejection side with respect to said ejection electrodes, for preventing electric field interferences between the through holes,
• wherein insulating flow path wall portions being joined to said ejection substrate and said support substrate are formed in said solution flow path at the positions of the through holes, and
• at least one of electrode lines connected to said ejection electrodes and electrode lines connected to said shield electrode are contained in the flow path wall portions,
• wherein said shield electrode is formed on a substrate surface on a side opposite to said solution flow path of said ejection substrate, the flow path wall portions contain the electrode lines connected to said ejection electrodes and the electrode lines connected to said shield electrode, and the electrode lines connected to said shield electrode pass through said ejection substrate and extend to a substrate surface side of said ejection substrate on which said shield electrode is formed.