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Non-wetting coating on a fluid ejector

A fluid injector, wetting technology, applied in coatings, devices for coating liquids on surfaces, nanotechnology for materials and surface science, etc., can solve difficult to form, expensive coatings, not durable coatings, etc. question

Active Publication Date: 2008-09-24
FUJIFILM DIMATIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, and fluorocarbon polymers are generally soft and not durable coatings
These coatings are also expensive and difficult to form

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
Comparison scheme
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Embodiment Construction

[0031] Figure 1 is a cross-sectional view of an uncoated fluid ejector 100 (eg, an inkjet printhead nozzle), which may be constructed as described in US Patent Application No. 10 / 913,571. Uncoated fluid injector 100 includes flow path module 110 and nozzle layer 120, both of which may be made of silicon (eg, single crystal silicon). In one embodiment, uncoated fluid injector 100 is a single unit, and flow path module 110 and nozzle layer 120 are not separate pieces. Uncoated fluid sprayer 100 includes an inner surface 150 and an outer surface 160 . Diaphragm layer 182 is positioned above plenum chamber 135 . Actuator 172 pressurizes fluid (eg, ink, eg, water-based ink) in plenum 135 , the fluid flows through descender 130 , and is ejected through apertures 140 in nozzle layer 120 . The actuator 172 includes a piezoelectric layer 176, a lower electrode 178 (eg, a ground electrode), and an upper electrode 174 (eg, a drive electrode). Diaphragm layer 182 and actuator 172 are n...

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PUM

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Abstract

A fluid ejector (105) having an inner surface (150), an outer surface (160), and an orifice (140) that allows fluid in contact with the inner surface (150) to be ejected. The fluid ejector (105) has a non-wetting monolayer (170) covering at least a portion of the outer surface (160) of the fluid ejector (105) and surrounding the orifice (140) in the fluid ejector (105). Fabrication of the non-wetting monolayer can include removing a non-wetting monolayer from a second region of a fluid ejector while leaving the non-wetting monolayer on a first region surrounding an orifice in the fluid ejector, or protecting a second region of a fluid ejector from having a non-wetting monolayer formed thereon, wherein the second region does not include a first region surrounding the orifice in the fluid ejector.

Description

technical field [0001] This invention relates to coatings on fluid sprayers. Background technique [0002] A fluid ejector (eg, an inkjet printhead) typically has an inner surface, an orifice through which fluid is ejected, and an outer surface. When fluid is injected from the orifice, the fluid collects on the outer surface of the fluid injector. As fluid collects on the outer surface adjacent to the hole, further fluid ejected from the hole can be diverted from the path of travel or completely blocked by the interaction of the collected fluid (eg, due to surface tension). Some materials from which fluid ejectors are made (eg, silicon) are hydrophilic, which typically exacerbates problems with pooling when ejecting fluid. [0003] Non-wetting coatings such as and fluorocarbon polymer coated surfaces. However, And fluorocarbon polymers are generally soft and not durable coatings. These coatings are also expensive and difficult to form. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/16B05D5/08
CPCB82Y30/00B41J2/1606B41J2/1433B41J2/16
Inventor 冈村好真约翰·A·希金森格雷戈里·德布兰班德保罗·A·霍伊辛顿杰弗里·伯克迈耶安德烈亚斯·拜布尔
Owner FUJIFILM DIMATIX