Oce-technologies B.v.

Oce-technology B.v.

David D L Wijngaards

Alex N Westland

Hans Reinten

Hendrik Jan Stolk

Hubertus M J M Boesten

René J Van Der Meer

Catharinus Van Acquoij

Aart Nijkamp

Maikel A J Huygens

Albert G M Van Welie

Hendrikus J M Freriks

Stanislaw K J Lenczowski

Rene Johannes Van Der Meer

Maarten J Bakker

Johannes G V Van Stiphout

A method of forming a nozzle of a fluid ejection device, the nozzle having a straight mouth portion and a cavity portion, wherein the mouth portion is formed in a bottom surface of the substrate, and, after passivating the walls of the mouth portion, a wet etch process is applied from the bottom surface of the substrate for forming a part of the cavity portion with walls that diverge from the mouth portion, characterized in that a wet etch process is also applied from a top surface of the substrate for forming a part of the cavity portion which diverges towards the bottom surface and merges with the part that is etched from the bottom surface.

Method of forming a nozzle of a fluid ejection device

A method of forming an array of piezoelectric actuators on a membrane () which includes the steps of preparing a piezoelectric comb-like structure having an array of islands that are integrally connected by a continuous top portion and that form piezoelectric layers of the actuators, the islands having an electrode at a bottom side, attaching the comb-like structure with its bottom electrode to a surface of the membrane, removing the continuous top portion of the comb-like structure to thereby separate the actuators from one another, and forming top electrodes on the top surfaces of the piezoelectric layers of the actuators.

Method of forming an array of piezoelectric actuators on a membrane

A method for manufacturing a nozzle and an associated funnel in a single plate comprises providing the single plate, the plate being etchable; providing an etch resistant mask on the plate, the mask having a pattern, wherein the pattern comprises a first pattern part for etching the nozzle and a second pattern part for etching the funnel; covering one of the first pattern part and the second pattern part using a first cover; etching one of the nozzle and funnel corresponding to the pattern part not covered in step (c); removing the first cover; etching the other one of the nozzle and funnel; and removing the etch resistant mask.

Method for manufacturing a nozzle and an associated funnel in a single plate

A method of manufacturing a piezoelectric ink jet device having a pressure chamber, a flexible membrane delimiting the pressure chamber, a piezoelectric actuator mounted on the membrane, and a rigid substrate attached to the side of the membrane carrying the actuator, which includes the steps of providing the piezoelectric actuator with an electrode on at least one side, attaching the actuator with its electrode side to a carrier plate, bonding the rigid substrate to the side of the carrier plate carrying the actuator, and removing material from the carrier plate on the side opposite to the actuator and leaving only a thin layer of the carrier plate which then forms the membrane.

Method of manufacturing a piezoelectric ink jet device

A piezoelectric actuator having a bottom electrode attached to a membrane, a piezoelectric layer on the bottom electrode, and a top electrode formed on the piezoelectric layer, wherein the bottom electrode extends substantially over the entire bottom surface of the piezoelectric layer, and at least a peripheral portion of a top surface of the piezoelectric layer and side faces of that layer are covered with an insulating layer, and wherein in the peripheral portion of the top surface of the piezoelectric layer the top electrode is superposed on the insulating layer.

Ink jet device having piezoelectric actuator with insulating structure and method of producing the piezoelectric actuator

An image-forming element for a printing apparatus which includes a support structure with a plurality of electrodes of a first type disposed thereon and an electronic control unit for energizing the electrodes. The image-forming element further includes a plurality of electrodes of a second type, each one of said electrodes of the second type being arranged for interacting capacitively through a dielectric layer with a number of electrodes of the first type, forming a group, the electronic control unit containing a first series of drivers for energizing the electrodes of the first type, each one of said drivers being suited for energizing one electrode of the first type within each group and a second series of drivers for energizing individually the electrodes of the second type, the first and second series of drivers being arranged such that the electrodes of the first type can be individually activated, image wise.

Growing community of inventors

Tegelen, Netherlands

David D L Wijngaards