Quantum Dot Micro-LED Structure for Simplified RGB Integration
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Solution Overview
Problem
Current methods for fabricating micro-LED displays are complex, involving the singulation and transfer of blue, red, and green micro-LEDs from separate wafers, which complicates the process of forming pixels on a display substrate.
Innovation Solution
A semiconductor device comprising a light-emitting structure with embedded quantum dots in nanoporous structures, where the light-conversion device is formed on the light-emitting device, allowing for the simultaneous integration of red, green, and blue light-emitting micro-LEDs on a single substrate, reducing the need for separate wafer processing and transfer steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate wafers are used for blue, red, and green micro-LEDs, then color variety is achieved, but fabrication complexity increases
Solution Approach 1:
The patent combines multiple light-emitting devices (blue micro-LED, red micro-LED, green micro-LED) and light-conversion devices onto a single substrate, eliminating the need for separate wafer processing and transfer steps for each color. This merging approach maintains color variety while significantly reducing fabrication complexity.
Solution Approach 2:
The substrate serves multiple functions by simultaneously supporting light-emitting devices of different colors and light-conversion devices. This universal substrate approach allows a single fabrication process to produce all color components, resolving the contradiction between color variety and fabrication complexity.
2Manufacturing precision
If quantum dots are embedded in nanoporous structures, then color purity is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent embeds quantum dots within nanoporous structures, where the porous material confines and enhances the optical properties of the quantum dots. This approach improves color purity by restricting quantum dot movement and enhancing light interaction, while the nanoporous structure provides a straightforward integration method that does not significantly increase manufacturing complexity.
3Ease of manufacture
If light-conversion device is formed on light-emitting device, then integration is simplified, but spatial arrangement complexity increases
Solution Approach 1:
The patent positions light-conversion devices directly on top of light-emitting devices, creating a nested vertical arrangement. This nesting simplifies integration by eliminating separate transfer steps, while the vertical stacking naturally manages spatial arrangement without adding significant complexity.
Solution Approach 2:
The patent transitions from a planar lateral arrangement to a vertical stacked configuration, where light-conversion devices are positioned in the vertical dimension above light-emitting devices. This dimensional change simplifies integration processes while efficiently managing spatial relationships.
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 approach enhances color purity and blue to red and green power conversion efficiencies, simplifies the display fabrication process, and enables the production of micro-LEDs with specific dimensions required for various applications.
Implementation Method 1
When a QD is illuminated by light, an electron in the QD may be excited to a state of higher energy. The QD may thus emit light of a certain wavelength.
Data Source
AI summary
In accordance with one or more aspects of the present disclosure, a semiconductor device is provided. The semiconductor device may include: a plurality of light-emitting devices comprising a first light-emitting device, a second light-emitting device, and a third light-emitting device; and a light-conversion device with embedded quantum dots. In some embodiments, a first portion of the light-conversion device includes a first plurality of quantum dots for converting light produced by the first light-emitting device into light of a first color, and a second portion of the light-conversion device includes a second plurality of quantum dots for converting light produced by the second light-emitting device into light of a second color. The third light-emitting device emits light of a third color.