To provide a liquid droplet ejection head which prevents the intrusion of cutting water by sealing a gap, made between an FPC mounting part and an IC input mounting part, by a simple structure and a simple manufacturing process, a liquid droplet ejector, a manufacturing method for the liquid droplet ejection head, and a manufacturing method for the liquid droplet ejector.
In the liquid droplet ejection head in which a nozzle substrate, a reservoir substrate, a cavity substrate and an electrode substrate are laminated together, the electrode substrate is provided with a groove for mounting a driver IC for supplying a driving signal to an individual electrode, and a flexible print substrate for supplying an input signal for driving the driver IC; the cavity substrate is provided with a hole part for housing the driver IC; and a through-hole, which communicates with a gap made between the groove and the cavity substrate by joining the electrode substrate and the cavity substrate together, is formed between the hole part of the cavity substrate and a flexible print substrate-mounted side.
Kiyoshi Yasushima
Souji Sasaki
Noboru Omura
Takanashi Norio