Fluorinated Light-Emitting Element Structure for Etch Defect Control
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Solution Overview
Problem
Current light emitting elements face challenges with structural defects and reduced emission efficiency due to etching processes, which affect the reliability and performance of display devices.
Innovation Solution
A light emitting element with a semiconductor stack structure including an N-type and P-type semiconductor layer, an active layer, and a fluorinated area adjacent to an insulating layer, where the fluorinated area has a non-uniform fluorine concentration gradient, acting as a barrier to reduce defects and enhance emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If etching process is used to form the semiconductor stack structure, then the structural definition is improved, but structural defects increase and emission efficiency decreases
Solution Approach 1:
A fluorinated area is introduced as an intermediary layer between the etched semiconductor stack structure and the insulating layer. This fluorinated area acts as a mediator that prevents direct harmful interaction between the etched surfaces and the insulating layer, thereby reducing structural defects while maintaining the precision benefits of etching.
Solution Approach 2:
The patent converts the harmful effect of etching-induced surface damage into a beneficial feature by intentionally creating a fluorinated area with controlled fluorine concentration gradient. The fluorination process transforms the damaged etched surface into a protective interface that reduces defects and improves emission efficiency.
2Reliability
If fluorine concentration is increased in the fluorinated area, then emission efficiency is improved, but structural stability may be compromised
Solution Approach 1:
The fluorinated area exhibits local quality variation through a non-uniform fluorine concentration gradient. The fluorine concentration is highest near the semiconductor stack structure interface and decreases toward the insulating layer, creating different functional zones within the same layer to simultaneously achieve high emission efficiency and structural stability.
Solution Approach 2:
The patent employs parameter changes by controlling the fluorine concentration as a gradient rather than a uniform value. By varying the fluorine concentration parameter across the fluorinated area, the patent optimizes both emission efficiency (higher concentration near active region) and structural stability (lower concentration toward insulating layer).
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 fluorinated area improves the structural stability and emission efficiency of the light emitting element, reducing the risk of defects and enhancing the reliability of the light emitting element and display devices.
Implementation Method 1
the fluorinated area may have a non-uniform fluorine (F) concentration gradient with respect to depth from an outer surface of the semiconductor stack structure
Implementation Method 2
a binding energy between fluorine (F) and gallium (Ga) may be greater than a binding energy of the metal oxide
Data Source
AI summary
A light emitting element may include a semiconductor stack structure including an N-type semiconductor layer, a P-type semiconductor layer, and an active layer disposed between the N-type semiconductor layer and the P-type semiconductor layer, and an insulating layer disposed on a side portion of the semiconductor stack structure. The semiconductor stack structure may include a fluorinated area disposed adjacent to the insulating layer.