Tantalum Oxide Layer for Micro-Fluid Ejection Head Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The manufacturing of micro-fluid ejection heads is hindered by the complexity and cost of existing techniques, which struggle to produce precise nozzle plates and fluid flow features efficiently, leading to variations in production quality and alignment issues that affect printer performance.
Innovation Solution
A method involving the application of a tantalum oxide layer with a specific thickness, determined by the equation t=(¼*W/n), where W is the wavelength of radiation and n is the refractive index, is used to improve the precision of nozzle holes and fluid flow channels, reducing radiation scattering and enhancing the protection of fluid ejection actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional manufacturing techniques are used to produce nozzle plates and fluid flow features, then production cost and complexity are reduced, but manufacturing precision and alignment quality deteriorate
Solution Approach 1:
The patent combines multiple manufacturing operations into a single integrated process. The nozzle plate and fluid flow features are formed simultaneously in one substrate using a unified manufacturing approach, eliminating the need for separate fabrication and assembly steps. This merging of operations achieves high precision while reducing process complexity.
Solution Approach 2:
The manufacturing process is designed to perform multiple functions simultaneously: forming nozzle holes, creating fluid flow channels, and establishing precise alignments all in one operation. This multi-functional approach improves manufacturing precision without proportionally increasing process complexity.
2Productivity
If conventional manufacturing techniques are used to produce nozzle plates and fluid flow features, then device complexity is reduced, but productivity and production efficiency deteriorate
Solution Approach 1:
By merging multiple manufacturing steps into a single integrated process, the patent eliminates sequential operations and reduces production cycle time. The simultaneous formation of nozzle plates and fluid flow features enables higher production rates without requiring complex multi-step processes.
3Measurement precision
If radiation is applied to image the photoimageable layer, then flow features are formed, but radiation scattering occurs that reduces imaging precision
Solution Approach 1:
The tantalum oxide layer serves as an intermediary between the radiation source and the photoimageable layer. This intermediate layer absorbs and filters scattered radiation, preventing it from reaching the photoimageable layer and degrading image quality. The mediator enables precise imaging by eliminating the harmful scattering effect.
4Manufacturing precision
If the nozzle plate is attached to the substrate using alignment procedures, then assembly is completed, but alignment variations affect production quality
Solution Approach 1:
The patent merges the formation of nozzle holes and fluid flow channels into a single simultaneous process. By creating both features in one operation within the same substrate, the need for separate alignment procedures between nozzle plates and heater resistors is eliminated, achieving perfect alignment without time-consuming adjustment steps.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the formation of micro-fluid ejection heads with precise flow features and improved protection of actuators, enhancing the alignment tolerances and overall performance of the ejection heads while reducing production costs and complexity.
Implementation Method 1
a tantalum oxide layer is applied to a surface of a fluid ejection actuator... The tantalum oxide layer has a thickness (t) that satisfies an equation t=(1⁄4*W/n), wherein W is a wavelength of radiation from a radiation source
Implementation Method 2
A radiation source is used to image a photoimageable layer... W is a wavelength of radiation from a radiation source
Data Source
AI summary
A method of making a micro-fluid ejection head structure and micro-fluid ejection heads made by the method. The method includes applying a tantalum oxide layer to a surface of a fluid ejection actuator disposed on a device surface of a substrate so that the tantalum oxide layer is the topmost layer of a plurality of layers including a resistive layer, and a protective layer selected from a passivation layer, a cavitation layer, and a combination of a passivation layer and a cavitation layer. The tantalum oxide layer has a thickness (t) that satisfies an equation t=(¼*W/n), wherein W is a wavelength of radiation from a radiation source, and n is a refractive index of the tantalum oxide layer. A photoimageable layer is also applied to the substrate. The photoimageable layer is imaged with the radiation source and then developed.