or pierced portions of the diaphragm plate 10 the depressed leaflets 52 reside out of the plane of the diaphragm plate 10 for an embodiment wherein the diaphragm plate 10 is attached to a printhead body 30 having a fluidic chamber 42 therein it will be appreciated that the leaflets 52 may be deflected into the body and toward the chamber 42 the number of port boundary partial etches 60 in the second embodiment need not be limited to four in other embodiments partially etched arcs and an alternating non etched arcs can be disposed on the diaphragm plate 10 generally linear partial etches 64 would be partially etched each generally linear partial etch 64 disposed within the port area 50 and connecting to at least one partially etched arc 60 on the port boundary by way of further illustrative example an embodiment not shown similar to the embodiment of fig6 may be formed having three partially etched arcs and three radial and generally linear partial etches with each generally linear partial etch extending generally from the central region of the port boundary to a partially etched arc it should be understood that a variety of partially etched arc generally linear partial etch configurations may be employed to generate various multi leaflet structures and that such variations and multi leaflet structures are within the scope of the present disclosure in a further embodiment partial etching is performed on the reverse or second side of the diaphragm 10 this partial etching may but is not required to mimic the etching of the first side of the diaphragm 10 by way of example the non partially etched hinge region 62 may be partially etched on a reverse side of the diaphragm 10 to facilitate hinging or.