A method of making an ejector device. The method includes providing a substrate and forming one or more ejector conduits on the substrate. The one or more ejector conduits comprise: a first end configured to accept a print material; a second end comprising an ejector nozzle, the ejector nozzle comprising a first electrode pair that includes a first electrode and a second electrode, at least one surface of the first electrode being exposed in the ejector nozzle and at least one surface of the second electrode being exposed in the ejector nozzle; and at least one passageway for allowing the print material to flow from the first end to the second end. A method of printing a three-dimensional object and a method for jetting print material from a printer jetting mechanism are also disclosed.

A liquid discharge head includes: a flow passage substrate which is formed with individual flow passages, the individual flow passages including nozzles and pressure chambers communicated with the nozzles respectively; actuators which are fixed to a surface of the flow passage substrate and which overlap with the pressure chambers respectively in an orthogonal direction; and a protective substrate which is fixed to the surface and which covers the actuators. The protective substrate has at least one wall portion for defining actuator accommodating chambers which accommodate the actuators respectively. The wall portion overlaps in the orthogonal direction with a partition wall for partitioning two pressure chambers in the flow passage substrate. The wall portion is adhered to the surface via an adhesive portion. A protective film is formed at portions of the protective substrate and the adhesive portion which define the actuator accommodating chambers.

A die for a printhead is provided in examples. The die includes a number of fluidic actuator arrays, proximate to a number of fluid feed holes. A number of address lines are disposed proximate to a number of logic circuits on a low-voltage side of the fluid feed holes. An address decoder circuit is coupled to at least a portion of the address lines to select a fluidic actuator in a fluidic actuator array for firing. The address decoder circuit is customized to select a different address for each fluidic actuator in the fluidic actuator array. A logic circuit triggers a driver circuit located in a high-voltage side of the plurality of fluid feed holes opposite the low-voltage side, based, at least in part, on a bit value for the fluidic actuator array, the fluidic actuator selected by the address decoder circuit, and a firing signal.

A liquid discharge head includes: a nozzle plate having a nozzle from which a liquid is to be discharged in a discharge direction, the nozzle having a cylindrical hole having periodical convex portions and concave portions on a sidewall of the nozzle in the discharge direction, a diameter of an outermost portion of the nozzle in the discharge direction being smaller than an average diameter of minimum values and maximum values of diameters of the cylindrical shape. The average diameter is obtained by: Average diameter = (Sum of minimum values + Sum of maximum values) / (Count of minimum values + Count of maximum values).

A channel member includes a first substrate in which a channel is formed from a first surface, and a second substrate having a second surface facing the first surface, wherein the first substrate and the second substrate are bonded to each other with an adhesive between the first surface and the second surface, wherein the channel has a polygonal shape when viewed from a direction orthogonal to the first surface, wherein the channel includes a first portion on the first surface side and a second portion that communicates with the first portion, wherein an aperture area of the second portion is larger than an aperture area of the first portion when viewed from the direction orthogonal to the first surface, and wherein the adhesive is present on a step surface between the first portion and the second portion and at vertices of the polygonal shape.

A flow path member includes a first substrate, a second substrate, bonding adhesive, and recessed portions. The first substrate has a first surface formed with an opening of a flow path. The second substrate has a second surface facing the first surface. The bonding adhesive bonds the first and second surfaces together. The recessed portions are formed in at least one of the first surface of the first substrate and the second surface of the second substrate. Each recessed portion is a hole configured to take up excess bonding adhesive and, as a non-through hole, does not extend through the entire thickness of a substrate. Each of the recessed portions extends into the first substrate or the second substrate as a rectangular column or an elliptical column and, when a shape of each recessed portion is viewed from the direction orthogonal to the first surface, the shape is approximately isotropic.

An inkjet print head includes a plurality of droplet jetting devices. The plurality of droplet jetting devices is formed of a nozzle layer defining, for each of the plurality of droplet jetting devices, a nozzle, a membrane layer carrying, on a membrane, a restrictor layer and an actuator for generating pressure waves in a liquid in a pressure chamber that is connected to the nozzle. The actuator is positioned in an actuator chamber in the restrictor layer, and a distribution layer defining a supply line for supplying the liquid to the pressure chamber. The restrictor layer includes an inlet restrictor having a cross-section and an outlet restrictor positioned on opposites sides of the actuator and having a cross-section that is different from the cross-section of the inlet restrictor.

A fluid ejection assembly may include a fluid ejection die comprising a back face and a front face through which fluid is ejected. The fluid ejection die may further include a fan-out fluid passages converging towards the back face of the fluid ejection die, the fan-out fluid passages comprising a first fan-out fluid passage and a second fan-out fluid passage and a recirculation channel extending within a polymeric material from the first fan-out fluid passage to the second fan-out fluid passage adjacent the back face of the fluid ejection die.

A liquid ejection head includes a recording element substrate and an electric wiring substrate. The recording element substrate includes an ejection port configured to eject liquid, an energy generating element configured to generate energy for ejecting the liquid from the ejection port, and an electrode terminal that is electrically connected to the energy generating element. The electric wiring substrate is electrically connected to the electrode terminal by using wire bonding or the like. The electrode terminal is disposed on a connection surface of the recording element substrate, and a connection region in which electric connection to the electrode terminal is established is arranged at an end portion of the electric wiring substrate. The end portion of the electric wiring substrate is disposed above the surface of the recording element substrate on the connection surface side and is separated from the electrode terminal.

A MEMS device includes a wire that is formed of a conductive portion embedded into a recess opened in a first face of a substrate and a bump electrode that is electrically connected to the wire. A total width, in a second direction intersecting a first direction along which the wire extends on the first face, of an opening of the recess in a connection region where the wire and the bump electrode are electrically connected to each other is narrower than a width, in the second direction, of an opening of the recess in a region outside the connection region.