Multi-Luminous Element With Segmented Quantum Wells
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Solution Overview
Problem
Conventional LED manufacturing for white light sources results in complex structures, complicated processes, and poor luminous efficiency due to the arrangement of active layers.
Innovation Solution
A multi-luminous element is designed with repeatedly disposed first and second active layers in a horizontal direction, each with specific semiconductor layer structures and patterns, to reduce luminous efficiency loss and enhance light extraction, utilizing a buffer layer, seed layer, and mask patterns to optimize light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional LED structure is used for white light source, then the device can be manufactured with standard processes, but the luminous efficiency is poor and the structure becomes complex
Solution Approach 1:
The active layer is divided into multiple quantum wells (MQWs) with different bandgap energies, creating distinct emission regions for different wavelengths. This segmentation allows efficient light generation at each wavelength while maintaining overall device manufacturability through standardized growth processes.
Solution Approach 2:
The patent transitions from a single-layer active region to a multi-layer quantum well structure stacked vertically. This dimensional change enables multiple wavelengths to be emitted from a single vertical stack, improving luminous efficiency while avoiding the complexity of multiple separate LED devices.
2Loss of energy
If multiple active layers are disposed horizontally, then luminous efficiency is improved, but the device structure and manufacturing process become complicated
Solution Approach 1:
Instead of arranging multiple active layers horizontally side-by-side, the patent stacks them vertically in a quantum well structure. This vertical arrangement achieves the same multi-wavelength emission function while maintaining a compact, simple device footprint and facilitating easier integration into standard LED packages.
Solution Approach 2:
Multiple quantum well layers are nested within a single active region structure, with each layer contributing to different wavelength emission. This nested configuration achieves complex multi-wavelength functionality while maintaining a simple external device structure and manufacturing process.
3Ease of manufacture
If conventional single active layer is used, then the manufacturing process is simple, but multi-wavelength light emission cannot be achieved efficiently
Solution Approach 1:
The active layer is segmented into multiple quantum wells with different compositions and bandgaps, enabling each segment to emit at a specific wavelength. This segmentation achieves multi-wavelength emission within a single manufacturable device structure using standard semiconductor growth techniques.
Solution Approach 2:
The patent employs composite quantum well structures with different material compositions (varying AlGaInN ratios) to achieve different emission wavelengths. This composite approach enables multi-wavelength emission while maintaining compatibility with existing LED manufacturing processes.
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 effectively reduces luminous efficiency loss and enables the production of multi-wavelength light sources with improved light extraction efficiency, allowing for various color extractions including red, green, blue, and white light.
Implementation Method 1
a first active layer located on the first type semiconductor layer and patterned to expose a part of the first type semiconductor layer; a second active layer located on the first type semiconductor layer exposed by the first active layer
Data Source
AI summary
The present invention relates to a multi-luminous element and a method for manufacturing the same. The present invention provides the multi-luminous element comprising: a buffer layer disposed on a substrate; a first type semiconductor layer disposed on the buffer layer; a first active layer which is disposed on the first type semiconductor layer and is patterned to expose a part of the first type semiconductor layer; a second active layer disposed on the first type semiconductor layer which is exposed by the first active layer; and a second type semiconductor layer disposed on the first active layer and the second active layer, the first and second active layers being repeatedly disposed in the horizontal direction, and the method for manufacturing the same. The multi-luminous element according to the present invention reduces loss of light emitting efficiency and can generate multi-wavelength light by repeatedly disposing the first and second active layers in the horizontal direction.