A liquid discharging head includes a print element substrate including an energy-generating element that generates energy used to discharge a liquid from a discharge port, and an electric wiring member including a plurality of contact pads arranged thereon. The plurality of contact pads are disposed in a contact area and include a first contact pad to which power for driving the energy-generating element is supplied and a second contact pad that has an electrostatic capacity lower than an electrostatic capacity of the first contact pad and that is disposed on an outer circumferential side of the contact area. The electric wiring member is connected to a ground of the print element substrate and includes a guard pad extending linearly outside the second contact pad.

A print head includes a substrate having a hole, a circuit on the substrate, the circuit having traces and a hole corresponding to the hole in the substrate, the hole forming a fluid path, and a raised structure on the substrate around the fluid path, the raised structure positioned to seal the circuit from the fluid path.

Printheads and methods for forming printheads are described herein. In one example, a printhead includes a number of drop generators, wherein a pitch between each adjacent drop generator is substantially the same, and the drop generators alternate between a high drop weight (HDW) drop generator and a low drop weight (LDW) drop generator. The printhead also includes a flow channel from an ink source leading into an ejection chamber associated with each drop generator, wherein the flow channel comprises an inflow region proximate to the ink source, wherein an area of the inflow region is adjusted to control the flux of ink into the ejection chamber.

Printheads and printers are described herein. In one example, a printhead includes a plurality of nozzles configured to eject ink drops of different sizes wherein a low drop weight (LDW) drop is ejected through a nozzle with a circular bore (CB), and a high drop weight (HDW) drop is ejected through a nozzle with a non-circular bore (NCB).

There is provided a method of producing an electromechanical transducer that includes a plurality of electromechanical transducer elements on a substrate. The method includes forming a plurality of individual electrodes corresponding to the plurality of electromechanical transducer elements on the substrate, forming an insulation film to cover the plurality of individual electrodes on the substrate, forming a conductive film on the insulation film, forming a plurality of openings to expose the plurality of individual electrodes in each of the insulation film and the conductive film, and forming a plurality of electromechanical transducer films on the plurality of individual electrodes exposed in the plurality of openings.

The present disclosure is directed to a microfluidic die that includes a plurality of heaters above a substrate, a plurality of chambers and nozzles above the heaters, a plurality of first contacts coupled to the heaters, and a plurality of second contacts coupled to the heaters. The plurality of second contacts are coupled to each other and coupled to ground. The die includes a plurality of contact pads, a first signal line coupled to the plurality of second contacts and to a first one of the plurality of contact pads, and a plurality of second signal lines, each second signal line being coupled to one of the plurality of first contacts, groups of the second signal lines being coupled together to drive a group of the plurality of heaters with a single signal, each group of the second signal lines being coupled to a remaining one of the plurality of contact pads.

A binary array ink jet printhead assembly includes a cavity for containing ink, nozzle orifices in fluid communication with the cavity for passing the ink from the cavity to form droplets, the nozzle orifices extending along a length of the cavity, and an electrode assembly. The electrode assembly includes a front face configured to be disposed generally parallel to a plurality of droplet paths of droplets from the nozzle orifices. A plurality of charge electrodes are disposed on the front face, each charge electrode corresponding to a droplet path and disposed parallel to the droplet path. Circuitry is disposed on the electrode assembly, wherein each electrode is electrically connected to the circuitry. The circuitry is further in electrical connection to a connector for connecting the electrode assembly to a controller for the printhead.

A recording element substrate includes: a substrate on which a plurality of energy generating elements that generate energy used for ejecting liquid are arranged side by side, an ejection port forming member in which ejection ports are formed at positions corresponding to the plurality of energy generating elements, a plurality of supply passages which are channels extending in a thickness direction of the substrate and through which liquid is supplied to the energy generating elements, and a support member that is formed between the substrate and the ejection port forming member and supports the ejection port forming member, in which supply ports that are apertures of the plurality of supply passages are linearly arranged side by side on the substrate, and a plurality of support members are provided side by side between adjacent supply ports on the substrate in a direction in which the supply ports are aligned.

Described herein are systems, devices, and methods to manufacture a feature onto the rim of an ophthalmic lens. In one embodiment, there are multiple lens rim features, and they are substantially restricted to the periphery of the lens. In alternative embodiments, the lens rim features are substantially restricted to either the top half or the bottom half of the periphery. In some embodiments, the features are added to a lens that has been finished for vision correction, whereas in other embodiments the features are added to a semi-finished lens. In one embodiment, there is a device for printing lens rim features onto an ophthalmic lens, and in another embodiment there is a system for printing such lens rim features. One embodiment is a method for printing a lens rim feature onto a lens, including the use of a device with a print-head and one or two grasping devices.

The present invention relates to devices and methods for coating surfaces including surfaces of medical devices, in particular the coating of microprojections on microprojection arrays. The present invention also relates to print head devices and their manufacture and to methods of using the print head devices for manufacturing articles such as microprojection arrays as well as to coating the surfaces of microprojection arrays. The present invention also relates to high throughput printing devices that utilize the print heads of the present invention.