Semiconductor Biasing Network for Polarization Homogeneity
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Solution Overview
Problem
Optoelectronic semiconductor components face challenges in achieving homogeneous polarization of structures due to inhomogeneous electromagnetic environments, leading to increased leakage current and reduced radiation absorption or emission efficiency, particularly in components with semiconductors like mercury-cadmium telluride that have low forbidden band energy.
Innovation Solution
A semiconductor component design featuring a conductive layer in contact with an insulating layer, which extends along the semiconductor layer and includes passages for individual biasing of each structure, allowing for uniform polarization and reflection of electromagnetic radiation, thereby reducing leakage current and enhancing radiation absorption or emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single peripheral bias contact is used to bias the semiconductor layer, then the device complexity is reduced, but the polarization homogeneity of the semiconductor layer deteriorates
Solution Approach 1:
The single peripheral bias contact is segmented into multiple local bias contacts distributed across the semiconductor layer. Each local bias contact independently biases a specific region, ensuring homogeneous polarization without requiring a complex network of conductive tracks and close contacts.
Solution Approach 2:
The biasing approach transitions from a single-point peripheral contact to a distributed array of local contacts across the semiconductor layer surface. This spatial distribution in multiple dimensions achieves uniform polarization while simplifying the overall biasing network architecture.
2Manufacturing precision
If conductive tracks and close contacts are used to ensure homogeneous polarization, then the polarization homogeneity is improved, but the electromagnetic environment uniformity of the structures deteriorates
Solution Approach 1:
The harmful conductive tracks and close contacts that create inhomogeneous electromagnetic environments are extracted and removed from the device architecture. Homogeneous polarization is achieved through local bias contacts that directly contact the semiconductor layer without introducing interfering conductive elements between the structures.
Solution Approach 2:
The local bias contacts serve as intermediaries that provide the necessary bias voltage to the semiconductor layer without creating the electromagnetic interference problems associated with conductive tracks. These contacts enable polarization homogeneity while maintaining electromagnetic environment uniformity.
3Manufacturing precision
If the semiconductor layer is made sufficiently conductive to ensure homogeneous polarization, then the polarization homogeneity is improved, but the adaptability to low forbidden band energy semiconductors deteriorates
Solution Approach 1:
Instead of requiring the entire semiconductor layer to have high conductivity, local bias contacts provide targeted biasing to specific regions. This local approach achieves homogeneous polarization without needing high overall conductivity, enabling compatibility with low forbidden band energy semiconductors like mercury-cadmium telluride.
Solution Approach 2:
The biasing strategy changes from relying on high semiconductor layer conductivity to using distributed local bias contacts. This parameter change in the biasing approach enables homogeneous polarization in materials with low forbidden band energy that cannot support high doping levels.
4Ease of operation
If connection pads are used to bias the semiconductor zones, then the individual polarization capability is improved, but the leakage current increases due to insulator charging
Solution Approach 1:
Local bias contacts serve as intermediaries between the connection pads and the semiconductor layer, providing the bias voltage without allowing direct contact that would charge the insulator. This intermediary approach maintains individual polarization capability while preventing leakage current generation.
Solution Approach 2:
The direct connection between connection pads and semiconductor zones that causes insulator charging is extracted and replaced with local bias contacts. This removal of the harmful direct connection path eliminates the leakage current mechanism while preserving individual polarization functionality.
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 design ensures each structure operates in a consistent electromagnetic environment, reducing leakage current and improving radiation absorption or emission efficiency by reflecting non-absorbed radiation back into the component, resulting in more homogeneous performance across all structures.
Implementation Method 1
improving radiation absorption or emission efficiency by reflecting non-absorbed radiation back into the component
Data Source
Figure 1~2
Figure 3~4
Figure 5~6b
AI summary
Semiconductor component (2) comprising a semiconductor layer (210) of a first conductivity type in which are arranged a plurality of semiconductor zones (220) of the opposite conductivity type to that of the semiconductor layer (210), and an insulating layer (271). The component furthermore comprising a first biasing means adapted to bias the semiconductor layer (210), and second biasing means each of which is adapted to bias one semiconductor zone (220). The first biasing means comprises a conductive layer (231) making contact with the insulating layer (271) and which comprises passages for each of the second biasing means with spacing between the conductive layer (231) and each of said second biasing means which is located facing the corresponding semiconductor zone (220).