III-V Semiconductor Oxide Structure for Low-Reflectance Photonics
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Solution Overview
Problem
Current III-V semiconductor technologies face challenges in replicating the beneficial native oxide formation and optical properties of silicon, which limits their application in microfabrication and photonics.
Innovation Solution
A semiconductor structure comprising a crystalline III-V semiconductor substrate with group 13 post-transition metal elements like gallium and arsenide, combined with crystalline particles chemically bonded to the substrate, which are formed by subjecting the substrate to water above 40°C for at least 2 minutes, enhancing optical properties such as reduced reflectance and increased photoluminescence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If III-V semiconductor substrates are used to achieve superior electronic properties and direct bandgap for photonics, then electron mobility and photonic performance are improved, but the absence of stable native oxide formation worsens microfabrication stability and process control
Solution Approach 1:
The patent introduces water as an intermediary substance that mediates between the III-V semiconductor substrate and oxygen to form crystalline oxide particles. This intermediary approach enables controlled oxide formation on III-V substrates, providing the stability and process control typically associated with silicon's native oxide, while preserving the superior electronic and photonic properties of III-V materials.
Solution Approach 2:
The patent changes the temperature parameter by immersing the substrate in water at temperatures above 40°C for at least 2 minutes. This parameter change triggers the formation of crystalline oxide particles on the III-V substrate surface, fundamentally altering the surface properties to enable stable microfabrication processes while maintaining the bulk material's superior electronic and photonic characteristics.
2Reliability
If conventional III-V semiconductor substrates are used, then superior electronic properties are achieved, but optical reflectance remains high and photoluminescence intensity is insufficient
Solution Approach 1:
The patent changes the surface chemical composition parameter by forming crystalline oxide particles through water immersion at elevated temperatures. This parameter change fundamentally alters the optical properties of the III-V substrate, reducing optical reflectance and enhancing photoluminescence intensity while preserving the bulk material's superior electronic properties.
3Ease of manufacture
If silicon is used to achieve stable native oxide formation for microfabrication, then manufacturing stability is improved, but electron mobility and direct bandgap properties are lost
Solution Approach 1:
The patent creates a composite structure by forming crystalline oxide particles on the surface of III-V semiconductor substrates. This composite approach combines the benefits of silicon-like stable oxide formation for microfabrication with the superior electronic and photonic properties of III-V materials, effectively merging the advantages of both material systems.
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 approach effectively decreases optical reflectance and increases photoluminescence intensity, improving the performance of III-V semiconductor substrates for applications in microfabrication and photonics.
Implementation Method 1
crystalline particles chemically bonded to the semiconductor substrate, the particles comprising the group 13 post-transition metal element and oxygen
Implementation Method 2
enhancing optical properties such as reduced reflectance and increased photoluminescence
Data Source
AI summary
This disclosure relates to a semiconductor structure, a semiconductor device, and a method for forming a semiconductor structure. The semiconductor structure comprises a crystalline III-V semiconductor substrate, the semiconductor substrate comprising a group 13 post-transition metal element and arsenide, and crystalline particles chemically bonded to the semiconductor substrate, the particles comprising the group 13 post-transition metal element and oxygen.