Dual Insulating Layers for Reliable Light-Emitting Elements
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Solution Overview
Problem
Current light-emitting devices face challenges in maintaining luminance and reliability due to insufficient protection of insulating layers, leading to deterioration and inefficiencies in light emission.
Innovation Solution
A light-emitting element design featuring a first insulating layer with a specific fixed charge and a second insulating layer with a different fixed charge, both formed using plasma enhanced atomic layer deposition (PEALD), where the second insulating layer surrounds the first to enhance protection and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single insulating layer is used to protect the light-emitting element core, then the device structure remains simple, but the luminance deteriorates and reliability decreases due to insufficient protection and carrier loss
Solution Approach 1:
The insulating layer is segmented into two distinct layers: a first insulating layer in direct contact with the light-emitting element core, and a second insulating layer surrounding the first layer. Each layer serves a specific protective function, with the first layer preventing carrier loss and the second layer providing additional mechanical and environmental protection, thereby resolving the contradiction between reliability improvement and structural simplicity.
Solution Approach 2:
The patent employs composite insulating layer structures where the first insulating layer and second insulating layer are made of different materials with complementary properties. This composite approach enhances overall protection effectiveness, prevents carrier loss, and improves device reliability while maintaining a manageable structural complexity through systematic material selection and layer configuration.
2Productivity
If the insulating layer lacks sufficient protective properties, then the manufacturing process remains simple, but carrier loss occurs leading to reduced light emission efficiency
Solution Approach 1:
The segmented insulating layer structure divides the protection function into two specialized layers, where the first layer is optimized for preventing carrier loss from the light-emitting element core, and the second layer provides additional protection. This segmentation enables each layer to be manufactured with specific material properties tailored to its function, improving light emission efficiency while keeping the manufacturing process systematically manageable.
Solution Approach 2:
Each insulating layer is designed with local quality appropriate to its position and function. The first insulating layer has properties optimized for direct contact with the light-emitting element core to prevent carrier loss, while the second insulating layer has properties optimized for external protection. This local quality approach ensures high light emission efficiency without requiring uniformly complex manufacturing across the entire structure.
3Duration of action of stationary object
If a single insulating layer is used, then the manufacturing process is simple, but the insulating layer suffers from damage and deterioration reducing device lifespan
Solution Approach 1:
The insulating layer is divided into two segments: the first insulating layer that directly protects the light-emitting element core from carrier loss, and the second insulating layer that provides additional mechanical and environmental protection. This segmentation distributes the protective stress and prevents single-point failure, thereby extending device lifespan while maintaining a relatively simple two-layer configuration.
Solution Approach 2:
The second insulating layer acts as a beforehand cushioning layer that protects the first insulating layer from external damage and deterioration. This prior protection mechanism prevents damage before it reaches the critical first layer, thereby extending device lifespan without significantly increasing manufacturing complexity, as the second layer serves as a sacrificial protective barrier.
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 configuration improves luminance and reliability by preventing carrier loss and damage to the insulating layers, resulting in higher light emission efficiency and extended device lifespan.
Implementation Method 1
forming the first insulating layer using a plasma enhanced atomic layer deposition method
Data Source
AI summary
A light-emitting device includes a light-emitting device core including a first semiconductor layer, a second semiconductor layer disposed on the first semiconductor layer, and an element active layer disposed between the first semiconductor layer and the second semiconductor layer; a first insulating layer disposed on the side surface of the light-emitting device core to surround the side surface of the light-emitting device core, and having first fixed charges; and a second insulating layer surrounding the outer side surface of the first insulating layer, and including a material having second fixed charges different from the first fixed charges.