A recording method comprises a discharging step of discharging a first ink and a second ink from a line head having a length equal to or longer than a recording width of a recording medium and allowing the inks to adhere to the recording medium, wherein the line head includes a plurality of unit heads aligned in the recording width direction of the recording medium and includes portions having different inter-nozzle distances in the scanning direction of a first nozzle that discharges the first ink and a second nozzle that discharges the second ink, and the first ink and the second ink contain color materials and inorganic oxide particles, and the color materials have compositions different from each other.

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.

The fluid ejection device includes a plurality of nozzles and a plurality of ejection chambers that includes a respective ejection chamber fluidically coupled to a respective nozzle. A plurality of inlet passages are fluidically coupled to the ejection chambers and input fluid to the ejection chambers at a first pressure. A plurality of outlet passages are fluidically coupled to the ejection chambers and output fluid from the ejection chambers at a second pressure that is less than the first pressure. Fluid circulates through the ejection chambers based on the pressure difference between the first and second pressure. The fluid ejection device also includes at least one micropump fluidically coupled to at least one ejection chamber to pump fluid through the at least one ejection chamber.

In one example in accordance with the present disclosure, a fluidic ejection die is described. The die includes an array of nozzles. Each nozzle includes an ejection chamber, an opening, and a fluid actuator disposed within the ejection chamber. Each nozzle also includes an inlet passage to deliver fluid into the ejection chamber and an outlet passage to deliver fluid out of the ejection chamber. The fluidic ejection die also includes an array of channels divided into inlet channels and outlet channels. Each inlet channel is fluidly connected to a respective plurality of inlet passages and each outlet channel is fluidly connected to a respective plurality of outlet passages.

There are provided a head chip and so on capable of improving the print image quality while suppressing the manufacturing cost. The head chip according to an embodiment of the present disclosure includes an actuator plate having a plurality of ejection grooves, a nozzle plate having a plurality of nozzle holes, and a cover plate having a first through hole, a second through hole, and a wall part. The plurality of nozzle holes includes a plurality of first nozzle holes arranged so as to be shifted toward the first through hole, and a plurality of second nozzle holes arranged so as to be shifted toward the second through hole. In a first ejection groove communicated with the first nozzle hole, a first cross-sectional area of a part communicated with the first through hole is smaller than a second cross-sectional area of a part communicated with the second through hole. In a second ejection groove communicated with the second nozzle hole, the second cross-sectional area is smaller than the first cross-sectional area. A first expansion flow channel part is formed in the vicinity of the first nozzle hole, and a second expansion flow channel part is formed in the vicinity of the second nozzle hole. A central position of the first expansion flow channel part coincides with a first central position of the first nozzle hole, or is shifted toward the first through hole. A central position of the second expansion flow channel part coincides with a second central position of the second nozzle hole, or is shifted toward the second through hole.

A method for producing a substrate that includes a protective layer made from a metal oxide protecting silicon against corrosion and an organic resin layer on a substrate surface of a silicon substrate includes the following steps in this order: step A of forming the protective layer on the substrate surface; step B of removing the protective layer from the substrate surface in a region Z1 that is a part of the region in which the protective layer has been formed; and step C of providing an organic resin layer on the substrate surface in a region Z2 including the region Z1.

There is provided a liquid jetting head including: a supply manifold configured to define a first circulation channel through which a liquid in the supply manifold circulates; descenders that communicate with the supply manifold, and which is configured to guide the liquid to nozzles, respectively; and a second circulation channel configured to guide the liquid not discharged from the nozzles to the supply manifold. The second circulation channel includes a return manifold that extends to communicate with the descenders, and a return channel that communicates with the return manifold and communicates with the supply manifold via a return port. A first end of the first circulation channel in the supply manifold is an outflow port and a second end of the first circulation channel in the supply manifold is an inflow port. In the supply manifold, the return port is closer to the inflow port than to the outflow port.

The liquid ejection head includes a substrate having a first surface and a second surface which is a back surface of the first surface, a plurality of individual channels provided on the first surface, communicating with the ejection port, and recirculating the liquid, and a circulation channel communicating with the plurality of individual channels and recirculating the liquid. The circulation channel is provided on the first surface and has a connection region communicating with the outlet ports of the plurality of individual channels, a supply through-hole penetrating the substrate and supplying the liquid to the connection region, and a correct through-hole penetrating the substrate and correcting the liquid from the connection region.

A service tank includes a container having an internal space, the container being provided with an inlet through which ink is introduced into the internal space and a plurality of supply ports through which the ink is supplied, a divider configured to divide the internal space into a plurality of compartments, and a detector configured to detect that the liquid surface of the ink is at an upper limit or a lower limit. The divider is attached between the inlet and a supply port located closest to the inlet. The divider includes a plate that prevents flow of the ink and air between adjacent compartments, an ink opening through which the ink flows between the adjacent compartments, and an air opening through which the air flows between the adjacent compartments. The plate, the ink opening, and the air opening are located in, below, and above the proper area, respectively.

A fluidic die may include a substrate supporting a fluid actuator address line and first and second groups of fluid actuators connected to the fluid actuator address line. The first group of fluid actuators may include first and second types of fluid actuators having different operating characteristics. The second group of fluid actuators may include the first and the second types of fluid actuators. The fluid actuators of the first and second groups have addresses such that a fluid actuator of the first type in the first group and a fluid actuator of the second type in the second group are both enabled in response to a single enabling event on the fluid actuator address line.