An ink jet type recording head of a multi-layer structure including a pressure generating unit and a flow path unit. The pressure generating unit is composed of a ceramic vibrating member with piezoelectric transducers on the surface thereof, a ceramic first spacer member with a plurality of through-holes...http://www.google.de/patents/US6270203?utm_source=gb-gplus-sharePatent US6270203 - Multilayer ink jet recording head having a pressure generating unit and a flow path unit
