Liquid droplet ejection apparatus and ink jet recording head

摘要

The liquid droplet ejection apparatus includes a substrate for holding on a surface thereof liquid to be ejected and liquid droplet ejection units provided on the substrate, for pushing the liquid to be ejected by a pushing stroke higher than a height of a liquid surface of the liquid to be ejected held on the substrate. A space existing in a liquid droplet ejecting direction of the liquid droplet ejection units is, substantially, an open space. The inkjet recording head and the thermal inkjet recording head includes the liquid droplet ejection apparatus.