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Thermal oxide coating on a fluid ejector

A technology of fluid injectors and oxide layers, applied in printing and other directions, can solve the problems of fluid injector differences, inaccuracy, and surface degradation of fluid injectors, etc.

Active Publication Date: 2015-03-18
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aggressive or alkaline fluids can attack the inner and outer surfaces of the fluid injector as the fluid passes through the fluid injector, causing deterioration of the fluid injector surfaces
Non-uniform fluid injector surfaces cause variance among fluid injectors in an injector array
Such non-uniformity can lead to unevenness and inaccuracy in fluid ejection

Method used

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  • Thermal oxide coating on a fluid ejector
  • Thermal oxide coating on a fluid ejector
  • Thermal oxide coating on a fluid ejector

Examples

Experimental program
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Effect test

Embodiment Construction

[0015] In fluid droplet ejection, degradation of the fluid ejector may occur as a result of aggressive or alkaline fluids attacking the surfaces of the fluid ejector. Exposed surfaces can be protected with a thermal oxide.

[0016] Apparatus for fluid droplet ejection may have a fluid ejection assembly, eg, a quadrilateral plate-type printhead assembly, which may be a die fabricated using semiconductor processing techniques. The fluid ejector may also include a housing for supporting the printhead assembly, along with other components such as a flex circuit for receiving data from an external processor and providing drive signals to the printhead assembly.

[0017] A printhead assembly includes a substrate in which a plurality of fluid flow paths are formed. The printhead assembly also includes a plurality of actuators, such as transducers, supported on the substrate for selectively ejecting fluid from the flow path. Thus, each flow path with its associated actuator provides...

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PUM

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Abstract

A fluid ejection module includes a flow-path body, a first oxide layer, a membrane, and a second oxide layer. The flow-path body has a first outer surface and an opposing second outer surface and a plurality of flow paths, each flow path extending at least from the first outer surface to the second outer surface. The first oxide layer coats at least an interior surface of each of the flow paths and the first and second outer surfaces of the flow-path body and has a thickness that varies by less than 5% along {100} planes. The membrane has a first outer surface. The second oxide layer is coated on the first outer surface of the membrane and has a thickness that varies by less than 5% along {100} planes and is bonded to the first oxide layer.

Description

technical field [0001] This disclosure generally relates to coatings on fluid sprayers. Background technique [0002] A fluid ejector (eg, an inkjet printhead) typically has a plurality of inner surfaces defining a fluid flow path, an aperture through which fluid is ejected, and an outer surface. Aggressive or alkaline fluids may attack the interior and exterior surfaces of the fluid ejector as the fluid passes through the fluid ejector, causing degradation of the fluid ejector surfaces. The non-uniform fluid ejector surface results in variation among the fluid ejectors in the ejector array. Such non-uniformity can lead to non-uniformity and inaccuracy in fluid ejection. Contents of the invention [0003] In one aspect, a fluid injector includes a flow path body, a first oxide layer, a membrane, and a second oxide layer. The flow path body has a first outer surface and an opposite second outer surface and a plurality of flow paths each extending from at least the first ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/14B41J2/16
CPCB41J2/1623B41J2/161B41J2/1626B41J2/1606B41J2/14233B41J2/1642
Inventor 陈振方格雷戈里·德布拉邦德
Owner FUJIFILM CORP