Electron Emitting Element Insulating Layer Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electron emitting elements suffer from silver nanoparticle agglomeration, leading to current leakage paths and reduced lifespan due to the formation of agglomerates in the resistance layer.
Innovation Solution
Incorporating a conductive fine particle dispersion in an insulating resin layer between electrodes, with a strategically designed insulating layer to control electron emission points, reducing particle accumulation and enhancing electron emission characteristics and device longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conductive fine particles are dispersed in the resistance layer, then electron emission points are formed, but particles accumulate at the edges of the insulating layer forming agglomerates
Solution Approach 1:
The insulating layer creates local quality differences in the resistance layer by causing conductive fine particles to accumulate at its edges. This controlled local accumulation generates multiple electron emission points (improving productivity) while the insulating layer's strategic placement prevents uncontrolled agglomeration, thus resolving the contradiction between forming emission points and maintaining composition stability
Solution Approach 2:
The insulating layer is formed beforehand in the electron emission region before the resistance layer is applied. This preliminary action pre-determines where conductive fine particles will accumulate, ensuring they form at controlled locations that generate electron emission points without creating harmful agglomerates, thereby resolving the contradiction between productivity and composition stability
2Stability of the object's composition
If the insulating layer covers the entire electrode surface, then particle accumulation is prevented, but electron emission characteristics deteriorate
Solution Approach 1:
The insulating layer is applied selectively only in the electron emission region rather than covering the entire electrode surface. This local quality approach maintains particle distribution control where needed to prevent agglomeration, while leaving other regions uncovered to preserve electron emission characteristics, thus resolving the contradiction between composition stability and emission performance
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
The solution improves electron emission characteristics and extends the lifespan of the electron emitting element by forming a large number of evenly distributed electron emission points, suppressing current leakage and agglomerate formation.
Implementation Method 1
electrons flow to the resistance layer as a result of a potential difference being generated between the lower electrode and the surface electrode
Implementation Method 2
electrons to be emitted from an electron emission region of the surface electrode
Implementation Method 3
The conductive fine particles in the resistance layer have a tendency to accumulate at the edges of the insulating layer
Data Source
AI summary
This electron emitting element includes a lower electrode, a surface electrode facing the lower electrode, a resistance layer arranged between the lower electrode and the surface electrode, and an insulating layer arranged between the lower electrode and the surface electrode. The resistance layer is an insulating resin layer containing conductive fine particles in a dispersed state. The insulating layer has a peripheral region for defining the electron emission region, and an emission control region which is arranged so as to overlap the electron emission region defined by the peripheral region. The emission control region is configured by a line-shaped insulating layer, a plurality of dot-shaped insulating layers, or both a line-shaped insulating layer and a plurality of dot-shaped insulating layers. The percentage of an area that the emission control region represents within an area of an electron emission region defined by the peripheral region is 2% or more and 60% or less.