Light Emitting Element Array With Graded Indium Layers for Color Quality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light emitting element arrays struggle to efficiently produce light of different colors with high quality and cost-effectiveness, particularly in manufacturing processes.
Innovation Solution
A light emitting element array is designed with varying indium content and layer structures in semiconductor layers to differentiate emission wavelengths, incorporating a multilayer structure for some elements and a single layer for others, with optimized manufacturing methods to enhance quality and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single layer structure is used for the second semiconductor layer, then the manufacturing process is simpler and costs are reduced, but the ability to produce high-quality light of different colors is limited
Solution Approach 1:
The patent applies local quality by differentiating the second semiconductor layer structure based on the specific light emission requirements of each element. Elements requiring high-quality light emission (e.g., red light with high indium content) use a multilayer structure with compositionally graded layers, while elements with less stringent requirements use a single layer structure. This localized differentiation optimizes each element's performance while controlling overall manufacturing complexity.
Solution Approach 2:
The patent utilizes parameter changes by varying the indium content and layer structure parameters of the second semiconductor layer to achieve different light emission wavelengths and qualities. By adjusting the indium composition gradient and layer thicknesses, the patent optimizes light emission characteristics for different colors while maintaining manufacturing feasibility.
2Manufacturing precision
If high indium content is used in the light emitting layer to achieve desired emission wavelengths, then light emission quality improves, but manufacturing complexity and costs increase
Solution Approach 1:
The patent segments the second semiconductor layer into multiple sub-layers with progressively increasing indium content. This segmentation allows the high indium content (e.g., 30-50% or higher) to be distributed across multiple layers rather than concentrated in a single layer, reducing the complexity of forming and controlling each individual layer while achieving the desired overall high indium content for high-quality light emission.
Solution Approach 2:
The patent addresses the complexity issue by transitioning from a single-dimensional (single layer) to a multi-dimensional (stacked layers) structure. By stacking multiple layers with varying indium content in the thickness direction, the patent achieves high overall indium content and high emission quality while managing complexity through systematic layer design rather than requiring excessively thick or complex single layers.
3Manufacturing precision
If different layer structures are used for different light emitting elements, then emission quality for each color is optimized, but manufacturing efficiency decreases
Solution Approach 1:
The patent applies preliminary action by pre-designing and pre-forming the multilayer second semiconductor layer structure for all elements that require high-quality emission before proceeding to light emitting layer formation. The compositionally graded layers are established in advance, creating a prepared foundation that simplifies subsequent manufacturing steps and allows for standardized processing of different elements with different requirements.
Solution Approach 2:
The patent achieves universality by designing a modular multilayer structure that can serve multiple functions: it provides compositional grading for high indium content elements, can be simplified to single-layer for standard elements, and maintains compatibility with standardized manufacturing processes. This universal structure design allows different element types to be manufactured using the same basic approach with parameter adjustments, maintaining manufacturing efficiency while optimizing emission quality.
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 enables high-quality production of light emitting elements with different colors, improving manufacturing efficiency and reducing costs by optimizing the structure and material of the light emitting elements based on emission wavelengths and indium content.
Implementation Method 1
a first light emitting element configured to emit a first color of light, and a second light emitting element configured to emit a second color of light different from the first color of light
Implementation Method 2
An indium content of the light emitting layer of the first light emitting element is higher than an indium content of the light emitting layer of the second light emitting element
Data Source
AI summary
A light emitting element array includes light emitting elements on a substrate that emit different color lights. Each light emitting element includes a first semiconductor layer, a second semiconductor layer on the first semiconductor layer, doped with a first conductivity type, and containing indium, a light emitting layer on the second semiconductor layer and containing indium, and a third semiconductor layer on the light emitting layer and doped with a second conductivity type. An indium content of the light emitting layer of a first light emitting element among the light emitting elements is higher than an indium content of the light emitting layer of a second light emitting element among the light emitting elements. The second semiconductor layer of the first light emitting element includes first layers containing indium alternately stacked with second layers. The second semiconductor layer of the second light emitting element is a single layer containing indium.