Gas-Filled Cavity Mirror for Optoelectronic Semiconductor Chips
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Solution Overview
Problem
Existing optoelectronic semiconductor chips face inefficiencies in reflecting electromagnetic radiation and heat dissipation due to the lack of a suitable medium between the semiconductor body and the mirror layer, with dielectric materials not providing optimal refractive index jumps or thermal conductivity.
Innovation Solution
Incorporating a gas-filled cavity between the semiconductor body and the mirror layer, created by contact points that provide mechanical and electrical connection, enhancing the refractive index jump for improved reflection and thermal conductivity through the use of gases like helium or hydrogen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dielectric materials are used between the semiconductor body and the mirror layer, then mechanical support and electrical insulation are provided, but the refractive index jump is insufficient and thermal conductivity is suboptimal
Solution Approach 1:
The patent changes the physical state of the medium from solid dielectric material to gaseous medium. This parameter change enables achieving both high refractive index contrast (gas refractive index ≈1.0 vs semiconductor ≈3.0-4.0) and high thermal conductivity simultaneously, resolving the contradiction between reflection efficiency and material selection complexity
Solution Approach 2:
The patent introduces a gas-filled cavity between the semiconductor body and mirror layer, using pneumatic principles to create a medium that provides both optical reflection enhancement through refractive index jump and thermal management through gas conduction, eliminating the need for complex dielectric material selection
2Temperature
If dielectric materials are used between the semiconductor body and the mirror layer, then structural support is provided, but thermal dissipation is insufficient
Solution Approach 1:
The patent extracts the solid dielectric material from the structure and replaces it with a gas-filled cavity. This extraction eliminates the thermal conductivity limitation of dielectrics while the cavity structure itself provides the necessary mechanical support, simplifying the manufacturing process by removing material deposition steps
Solution Approach 2:
By changing the medium from solid to gas, the patent achieves superior thermal dissipation through gas conduction and convection in the cavity, while the ease of manufacture is improved by eliminating complex dielectric layer deposition and curing processes
3Reliability
If a gas-filled cavity is introduced, then refractive index jump and thermal conductivity are improved, but mechanical support and sealing are challenging
Solution Approach 1:
The patent employs thin film structures and flexible sealing mechanisms to contain the gas in the cavity while maintaining mechanical integrity. The gas-filled cavity is sealed using thin film techniques that provide both optical transparency for reflection efficiency and mechanical strength for structural support
Solution Approach 2:
The patent uses composite structures combining solid semiconductor material, gas-filled cavity, and sealed mirror layer to achieve both optical reflection efficiency through refractive index jump and mechanical strength through the composite nature of the chip structure
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 gas-filled cavity increases the efficiency of the optoelectronic semiconductor chip by enabling better reflection and heat dissipation, replacing dielectric materials with improved optical and thermal properties.
Implementation Method 1
enhancing the refractive index jump for improved reflection
Implementation Method 2
thermal conductivity through the use of gases like helium or hydrogen
Data Source
AI summary
An optoelectronic semiconductor chip includes a semiconductor body containing an active region, a mirror layer, and contact points arranged between the semiconductor body and the mirror layer and providing a spacing D between the semiconductor body and the mirror layer, whereby at least one cavity is formed between the mirror layer and the semiconductor body and the at least one cavity contains a gas.