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Non-wetting coating on a fluid ejector

A fluid ejector, wetting technology, used in coatings, devices that apply liquid to surfaces, printing, etc., can solve the problems of expensive coatings, not durable coatings, difficult to form patterns, etc., to improve durability, improve Reliability, effect of improved droplet size

Active Publication Date: 2011-09-28
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Teflon and fluorocarbon polymers are typically soft and not durable coatings
These coatings can also be expensive and difficult to pattern

Method used

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  • Non-wetting coating on a fluid ejector
  • Non-wetting coating on a fluid ejector
  • Non-wetting coating on a fluid ejector

Examples

Experimental program
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Embodiment Construction

[0026] Figure 1A Is a cross-sectional view of a fluid ejector 100 (for example, an inkjet print head nozzle), aspects of the fluid ejector not discussed here can be implemented as described in US Patent Publication No. 2008-0020573, which The content of is hereby incorporated into this article for reference.

[0027] The fluid ejector 100 includes a substrate 102 having a fluid flow path 104 formed in the substrate. The substrate 102 may include a flow path body 110, a nozzle layer 112 and a diaphragm layer 114. The fluid flow path 104 may include a fluid inlet 120, an ascending part 122, a suction chamber 124 adjacent to the diaphragm layer 114, a descending part 126, and a nozzle 128 formed through the nozzle layer 112. Each of the flow path body 110, the nozzle layer 112, and the diaphragm layer 114 may be silicon, for example, single crystal silicon. In some embodiments, the flow path body 110, the nozzle layer 112, and the diaphragm layer 114 are melt-bonded or silicon-to-...

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Abstract

A fluid ejector includes a substrate having an exterior surface and an interior surface. A non-wetting coating can cover at least a portion of the exterior surface and can be substantially absent from the flow path. A non-wetting coating can be formed of a molecular aggregation. A precursor of a non-wetting coating may flow into a chamber at a higher temperature higher than the substrate. A non-wetting coating can be over a seed layer. An outer portion of the seed layer can have a higher concentration of water molecules or a greater density than an inner portion. The outer portion can be deposited at a ratio of partial pressure water to partial pressure matrix precursor that is higher than the ratio for the inner portion. An oxygen plasma can be applied to a seed layer on the exterior surface, and the non-wetting coating can be applied on the seed layer.

Description

Technical field [0001] The present invention relates to coatings on fluid ejectors. Background technique [0002] Fluid ejectors (e.g., inkjet print heads) typically have an inner surface, an orifice through which fluid is ejected, and an outer surface. When the fluid is ejected from the orifice, the fluid can accumulate on the outer surface of the fluid ejector. When fluid accumulates on the outer surface adjacent to the orifice, the fluid further ejected from the orifice may be diverted or obstructed as a whole from the desired movement path due to interaction with the accumulated fluid (for example, due to surface tension). [0003] Teflon Non-wetting coatings with fluorocarbon polymers can be used to coat surfaces. However, Teflon And fluorocarbon polymers are typically soft and not durable coatings. These coatings can also be expensive and difficult to pattern. Summary of the invention [0004] In one aspect, a fluid ejector includes: a substrate having an outer surface a...

Claims

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Application Information

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IPC IPC(8): B41J2/135
CPCB41J2/1606B41J2/14233B41J2/165B05C5/00B41J2/135
Inventor 冈村好真
Owner FUJIFILM CORP
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