Radiation Detector Insulating Layer for Electrode Oxidation Protection
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Solution Overview
Problem
Existing radiation detection apparatuses face the risk of electrode deterioration due to oxidation when exposed to outside air, despite protection measures for the semiconductor layer.
Innovation Solution
A radiation detection apparatus is designed with an insulating layer covering the electrodes and semiconductor layer to protect the detection unit from external influences, using materials like silicon nitride or aluminum oxide to shield the electrodes and semiconductor layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the semiconductor layer is covered with an organic layer to protect from outside air, then the moisture resistance of the semiconductor layer is improved, but the electrodes constituting the detection unit will deteriorate due to oxidation
Solution Approach 1:
The protective function is segmented into two distinct layers: an organic layer covering the semiconductor layer to provide moisture resistance, and an inorganic layer covering the electrodes to provide oxidation protection. This segmentation allows each layer to specialize in protecting its specific component without interfering with the other.
Solution Approach 2:
The inorganic layer acts as an intermediary protective barrier between the electrodes and the external environment. This intermediate layer specifically addresses the oxidation problem of the electrodes while allowing the organic layer to continue providing moisture protection to the semiconductor layer.
2Device complexity
If the electrodes are exposed to outside air, then the detection unit structure is simplified, but the electrodes will deteriorate due to oxidation
Solution Approach 1:
A thin inorganic layer is applied to cover the electrodes, providing protection against oxidation. This thin film approach maintains the simplicity of the overall device structure while effectively preventing electrode deterioration through the formation of a protective barrier.
3Ease of manufacture
If no protective layer is provided, then the manufacturing process is simplified, but the detection unit will deteriorate due to oxidation and moisture
Solution Approach 1:
Protective layers are applied in advance during the manufacturing process before the detection unit is completed. The organic layer is applied to the semiconductor layer and the inorganic layer is applied to the electrodes as preliminary protective measures, ensuring long-term durability without requiring additional protective structures later.
Solution Approach 2:
A composite protective system is implemented using both organic and inorganic materials. The organic layer provides moisture resistance while the inorganic layer provides oxidation resistance, creating a composite protection system that addresses multiple degradation mechanisms simultaneously.
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 insulating layer effectively prevents degradation of the detection unit, ensuring the longevity and reliability of the radiation detection apparatus.
Implementation Method 1
a semiconductor layer located on the first electrode, the semiconductor layer producing a charge corresponding to radiation incident on the radiation detection apparatus
Implementation Method 2
there is a risk that the electrodes constituting the detection unit will deteriorate due to oxidation or the like if those electrodes are exposed to outside air
Data Source
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AI summary
A radiation detection apparatus comprises a board, a first electrode located on the board, a semiconductor layer located on the first electrode, the semiconductor layer producing a charge corresponding to radiation incident on the radiation detection apparatus, a second electrode located on the semiconductor layer, the second electrode having a first surface contacting the semiconductor layer and a second surface opposite the first surface; and an insulating layer contacting the second surface of the second electrode.