Electron Emission Yarn Stability via Segmented Fixed Structure
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Solution Overview
Problem
Nanomaterial-based electron emission sources are structurally unstable in high electric fields, leading to potential collapse and reduced efficiency in electron emission.
Innovation Solution
An electron emission source design featuring a substrate with a fixed structure and electron emission yarns extending between the substrate and the fixed structure, where the fixed structure includes alternating portions with different widths, providing support to maintain yarn stability and efficiency through a winding and cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If nanomaterial yarns are used as electron emission sources, then high current density can be achieved, but structural stability deteriorates in high electric fields
Solution Approach 1:
The fixed structure is divided into multiple portions (first portion with smaller width, second portion with larger width) that alternately support different yarns. This segmentation allows each portion to independently stabilize its supported yarn(s) while contributing to overall structural integrity in high electric fields.
Solution Approach 2:
Different portions of the fixed structure have different widths tailored to specific stabilization needs. The first portion (narrower) provides localized support for certain yarns, while the second portion (wider) provides enhanced support for other yarns, optimizing stability distribution across the electron emission source.
2Reliability
If a complex fixed structure is used to stabilize yarns, then reliability improves, but device complexity increases
Solution Approach 1:
The fixed structure employs asymmetric design with alternating first and second portions of different widths. This asymmetric configuration provides effective stabilization for yarns while maintaining manufacturing simplicity through repetitive alternating patterns rather than complex unique features.
Solution Approach 2:
The fixed structure is pre-formed with alternating wide and narrow portions before yarn attachment. This preliminary structuring ensures that yarns are automatically positioned and stabilized in optimal locations, eliminating the need for complex post-assembly adjustments or additional stabilization mechanisms.
3Ease of manufacture
If traditional manufacturing methods are used for electron emission arrays, then manufacturing capability is maintained, but process time and cost increase
Solution Approach 1:
The method combines multiple operations into integrated steps: the fixed structure is formed with built-in stabilization features, yarns are attached in a single operation to multiple portions simultaneously, and cutting is performed to final dimensions. This merging of operations reduces total process time and simplifies manufacturing workflows.
Solution Approach 2:
The fixed structure is designed to self-stabilize yarns through its alternating wide-narrow portion geometry. The structure's own geometry provides the stabilization function without requiring additional external components or complex assembly procedures, enabling simpler and faster manufacturing.
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
Enhances the stability and manufacturing efficiency of electron emission sources by ensuring the nanomaterial yarns remain upright and functional within high electric fields, minimizing process time and cost.
Implementation Method 1
Nanomaterial yarns may emit electrons within an electric field
Data Source
AI summary
Provided is an electron emission source including a substrate, a fixed structure provided on the substrate, and an electron emission yarn provided between the substrate and the fixed structure. The fixed structure includes a first portion having a first width and a second portion having a second width greater than the first width, and the electron emission yarn extends on a first sidewall of the first portion of the fixed structure from between the fixed structure and the substrate.