Semiconductor Light Emitting Device Textured Surface Patterns
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Solution Overview
Problem
Current semiconductor light emitting devices face challenges in achieving high light extraction efficiency and reproducibility, particularly in the distribution and arrangement of light extraction patterns on their surfaces.
Innovation Solution
The semiconductor light emitting device incorporates a textured surface with regularly arranged patterns, transferred from a growth substrate, which includes a partition structure with windows containing wavelength converters to enhance light extraction and efficiency, and features a specific arrangement of patterns in light emitting and covered regions to optimize light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If light extraction patterns are arranged on the semiconductor laminate surface, then light extraction efficiency is improved, but manufacturing precision and reproducibility deteriorate due to difficulty in forming uniform patterns
Solution Approach 1:
The semiconductor laminate surface is divided into multiple regions with different pattern types: first patterns (e.g., hemispherical bumps) in the light emitting region and second patterns (e.g., planar or differently shaped structures) in the covered region. This segmentation allows each region to be optimized independently for its specific function while maintaining overall manufacturing feasibility
Solution Approach 2:
Different surface patterns are applied to different regions of the semiconductor laminate based on local functional requirements. The light emitting region receives patterns optimized for light extraction, while the covered region receives patterns suited for its specific needs, achieving local optimization without compromising overall device performance
2Loss of energy
If uniform light extraction patterns are formed across the entire surface, then light extraction efficiency is improved, but the device complexity increases due to additional manufacturing steps
Solution Approach 1:
The surface patterns are segmented into at least two types corresponding to different functional regions. This segmentation enables simplified manufacturing by using different formation methods for different regions, reducing the overall process complexity while maintaining high light extraction efficiency in critical areas
Solution Approach 2:
Complex light extraction patterns are applied only where necessary (in the light emitting region), while simpler or no patterns are used in the covered region. This partial application of complex structures reduces overall device complexity while achieving the required light extraction 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
This configuration significantly improves light extraction efficiency and reproducibility by ensuring uniform and effective light distribution across the device's surface, addressing previous limitations in pattern formation and light emission.
Implementation Method 1
a wavelength converter in the window, the wavelength converter being configured to convert a wavelength of light emitted from the active layer
Implementation Method 2
The semiconductor light emitting device incorporates a textured surface with regularly arranged patterns, transferred from a growth substrate, which includes a partition structure with windows containing wavelength converters to enhance light extraction and efficiency
Data Source
AI summary
A semiconductor light emitting device including a semiconductor laminate having first and second surfaces, the semiconductor laminate including first and second conductivity-type semiconductor layers, and an active layer between the semiconductor layers; a partition structure on the first surface, the partition structure having a window defining a light emitting region of the first surface of the semiconductor laminate; a wavelength converter in the window, the wavelength converter being configured to convert a wavelength of light emitted from the active layer; and a first electrode and a second electrode on the second surface of the semiconductor laminate and respectively connected to the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer, wherein the semiconductor laminate includes a plurality of first patterns arranged in the light emitting region of the first surface, and a plurality of second patterns arranged in a covered region of the first surface contacting the partition structure.