Multi-functional Cathode Packaging for Solid-State Radiation Detectors
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Solution Overview
Problem
Radiation detectors face challenges in providing effective mechanical protection, electrical connectivity, and shielding from electromagnetic fields while maintaining high performance and reducing current leakage, particularly at the edges of the detector.
Innovation Solution
A radiation detector design featuring a semiconductor substrate with a cathode electrode on one surface and anode electrodes on the other, integrated with an electrically conductive housing that provides mechanical protection, electrical contact, and shielding from electromagnetic fields, using a multi-functional housing that also improves edge pixel performance and reduces current leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separately formed electrically conductive housing is attached to the cathode electrode, then mechanical protection and shielding are improved, but device complexity increases
Solution Approach 1:
The patent merges the housing and cathode electrode into a single integrated component. The cathode electrode is formed directly within the electrically conductive housing as a monolithic structure, eliminating the need for separate attachment steps. This integration maintains mechanical protection and electrical connectivity while reducing device complexity by consolidating multiple components into one.
Solution Approach 2:
The electrically conductive housing serves multiple functions simultaneously: it provides mechanical protection for the semiconductor substrate, acts as an electrical conductor for the cathode electrode, and shields against electromagnetic interference. This multi-functionality reduces the need for separate components, thereby improving reliability without proportionally increasing device complexity.
2Object-affected harmful factors
If the housing provides shielding from electromagnetic fields, then shielding performance is improved, but electrical connectivity may be compromised
Solution Approach 1:
The housing exhibits different electrical properties in different regions: it is electrically conductive where it contacts the cathode electrode to ensure electrical connectivity, while providing electromagnetic shielding in other regions. The cathode electrode formed within the housing creates localized conductive pathways that maintain electrical connectivity while the overall housing structure provides electromagnetic shielding.
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 solution enhances the mechanical protection and electrical connectivity of radiation detectors, shields them from electromagnetic interference, and improves edge pixel performance, leading to more reliable and efficient gamma-ray and X-ray detection.
Implementation Method 1
an electrically conductive housing placed in electrical contact with the cathode electrode
Implementation Method 2
an electrically conductive housing placed in electrical contact with the cathode electrode... shields them from electromagnetic interference
Data Source
AI summary
A radiation detector includes a semiconductor substrate with opposing front and rear surfaces, where a cathode electrode is located on the front surface, a plurality of anode electrodes located on the rear surface, and an electrically conductive housing is placed in electrical contact with the cathode electrode.