摘要:
A continuous liquid ejection system includes a substrate and an orifice plate affixed to the substrate. Portions of the substrate define a liquid chamber. The orifice plate includes a MEMS transducing member. A first portion of the MEMS transducing member is anchored to the substrate. A second portion of the MEMS transducing member extends over at least a portion of the liquid chamber and is free to move relative to the liquid chamber. A compliant membrane is positioned in contact with the MEMS transducing member. A first portion of the compliant membrane covers the MEMS transducing member and a second portion of the compliant membrane is anchored to the substrate. The compliant membrane includes an orifice. A liquid supply provides a liquid to the liquid chamber under a pressure sufficient to eject a continuous jet of the liquid through the orifice located in the compliant membrane of the orifice plate. The MEMS transducing member is selectively actuated to cause a portion of the compliant membrane to be displaced relative to the liquid chamber to cause a drop of liquid to break off from the liquid jet.
摘要:
A method of manufacturing a printhead includes providing a substrate and a filter membrane structure. A first portion of the substrate defines a plurality of nozzles and a second portion of the substrate defines a plurality of liquid chambers. Each liquid chamber of the plurality of liquid chambers is in fluid communication with a respective one of the plurality of nozzles. The filter membrane structure is adhered, for example, laminated, to the second portion of the substrate. Each liquid chamber of the plurality of liquid chambers is in fluid communication with a distinct portion of the filter membrane structure. Pores are formed in the filter membrane structure using a photo-lithography process.
摘要:
A printing device includes a first array of dot forming elements disposed on a substrate along an array direction at a first array-direction spacing to provide a first dot forming resolution R1 for dots of a first color; and a group of N arrays of dot forming elements, wherein the dot forming elements in each array of the group of N arrays are disposed on the substrate along the array direction at a second array-direction spacing to provide a dot forming resolution equal to R1/N; at least one of the N arrays of dot forming elements forms dots of a different color than at least one of the other arrays of the N arrays in the group; and N is greater than 1.
摘要:
A liquid drop ejector is provided. The ejector includes a liquid chamber and a liquid supply. Portions of the liquid chamber define a nozzle bore. A liquid supply passageway is positioned between the liquid chamber and the liquid supply. The liquid supply passageway is in fluid communication with the liquid chamber and the liquid supply. A plurality of pillars is suspended in the liquid supply passageway. A wall of the liquid chamber can extend to the liquid supply passageway. A center pillar can also be included with a portion of the center pillar being positioned in the liquid chamber and another portion of the center pillar being positioned in the liquid supply passageway.
摘要:
A method for creating an inkjet chamber. The method comprises the steps of firstly providing a substrate having a nozzle opening and secondly etching the substrate through the nozzle opening by alternating between anisotropic and isotropic etching processes for forming a chamber having a shape approximating a cylinder by using multiple hemispheric etches.
摘要:
An apparatus for a liquid drop emitter, especially for use in an ink jet printhead, is disclosed. A chamber filled with a liquid, a nozzle and a thermo-mechanical actuator, extending into the chamber from at least one wall of the chamber is disclosed. A movable element of the thermo-mechanical actuator is configured with a bending portion which bends when heated, the bending portion having at least one actuator opening for passage of the liquid. Apparatus is adapted to apply heat pulses to the bending portion resulting in rapid deflection of the movable element, ejection of a liquid drop, and passage of liquid through the at least one actuator opening. A movable element configured as a cantilever or as a beam extending from anchor walls of the chamber is disclosed. The thermo-mechanical actuator may be formed as a laminate structure including a layer constructed of a deflector material having a high coefficient of thermal expansion and that is electrically resistive, for example, titanium aluminide. Apparatus adapted to apply heat pulses comprising a resistive heater formed in the deflector material in the bending portion is also disclosed.
摘要:
A vertical cavity laser array device including a substrate, top and bottom dielectric stacks, and an active region for producing laser light. The active region includes one or more periodic gain region(s) and spacer layers disposed on either side of the periodic gain region(s) and arranged so that the periodic gain region(s) is aligned with the antinodes of the device's standing wave electromagnetic field. A structure is provided for modulating the properties of the periodic gain region(s) at spaced locations so as to provide an array of spaced laser pixels which have higher net gain than the interpixel regions; and the spaced laser pixels having the same or different sizes and the spacings between pixels having the same or different lengths to cause the output of the vertical cavity laser array device to produce single or multimode laser output.
摘要:
An apparatus and method of operating a liquid drop emitter, such as an ink jet device, for emitting liquid drops of different volumes. The liquid drop emitter comprises a chamber, filled with a liquid, having a nozzle for emitting drops of the liquid, a thermo-mechanical actuator having a moveable portion within the chamber for applying pressure to the liquid at the nozzle, and apparatus adapted to apply heat pulses to the thermo-mechanical actuator. The method for operating comprises applying a first heat pulse having a first power P1, first pulse duration τp1, and first energy E1=P1×τp1, displacing the movable portion of the actuator so that a drop is emitted having a first drop volume Vd1, and traveling substantially at the target velocity v0; and applying a second heat pulse having a second power P2, second pulse duration τp2, and second energy E2=P2×τp2, displacing the movable portion of the actuator so that a drop is emitted having a second drop volume Vd2 and traveling substantially at the target velocity v0, wherein Vd2>Vd1, E2>E1, τp2>τp1, and P2
摘要:
An organic vertical cavity laser device includes a substrate; a bottom dielectric stack reflective to light over a predetermined range of wavelengths and being disposed over the substrate, and an organic active region for producing laser light. The device also includes a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths, and a thermally conductive transparent layer disposed between the bottom dielectric stack and the organic active region or between the top dielectric stack and the organic active region or both.
摘要:
An apparatus and method of operating a liquid drop emitter, such as an ink jet device, for emitting a series of liquid drops using reduced energy, is disclosed. The method is applicable to a drop emitter comprising a liquid-filled chamber having a nozzle and an actuator, such as a thermal actuator, for applying pressure to liquid at the nozzle. The actuator has a movable portion and exhibits damped resonant oscillation having a fundamental period, TR, and a damping time constant, TD. Apparatus adapted to cause rapid displacement of the movable portion of the actuator in response to electrical pulses causes drop ejection and damped resonant oscillation of the thermal actuator. The method of operating comprises applying electrical pulses having a nominal energy if the actuator is quiescent or applying reduced energy pulses to the actuator if it is usefully oscillating due to a previous drop emission. By advantageous use of resonant oscillations of the actuator, overall energy usage is reduced, and the productivity of the drop emitter is increased.