Light Detector Insulating Parts Reduce Crosstalk
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Solution Overview
Problem
Current light detectors face challenges in enhancing their performance, particularly in reducing crosstalk and leakage current, while maintaining efficient light detection and sensitivity.
Innovation Solution
The design incorporates a conductive layer with specific semiconductor layers and insulating parts to control potential and reduce crosstalk, utilizing a conductor that is electrically connected to the conductive layer and surrounded by insulating parts to suppress leakage current and secondary photon interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional light detector structure is used, then light detection function is maintained, but crosstalk and leakage current increase reducing performance
Solution Approach 1:
An insulating layer is introduced as an intermediary between adjacent semiconductor elements to prevent electrical interaction and reduce crosstalk. The insulating layer acts as a mediator that isolates the elements while maintaining their individual detection functions, thereby reducing harmful leakage current and crosstalk between elements.
Solution Approach 2:
The detector structure is segmented into isolated elements using insulating materials between them. This segmentation creates independent detection regions that prevent charge carrier diffusion and electrical interference between adjacent elements, reducing crosstalk while maintaining overall detection performance.
2Object-generated harmful factors
If insulating parts are added to reduce leakage current, then leakage current is suppressed, but device complexity increases
Solution Approach 1:
The insulating layer is merged with the semiconductor fabrication process, integrating the isolation function into the base structure rather than adding separate components. This combining approach reduces leakage current while minimizing the increase in device complexity by using a unified manufacturing process.
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
This configuration improves the light detection efficiency, reduces crosstalk, and enhances the overall performance of the light detector by controlling potential and minimizing leakage current.
Implementation Method 1
a second semiconductor layer of a second conductivity type and provided between the first conductive portion and the first semiconductor layer in a second direction crossing a first direction from the first conductive portion toward the second conductive portion
Data Source
AI summary
According to one embodiment, a light detector includes a conductive layer, a first element, a second element, a first member, a first insulating part, and a second insulating part. The conductive layer includes a first conductive portion and a second conductive portion. The first element includes a first semiconductor layer and a second semiconductor layer. The second element includes a fourth semiconductor layer and a fifth semiconductor layer. The first member is provided between the first element and the second element and electrically connected to the conductive layer. The first member is conductive. The first insulating part is provided between the first element and the first member. The second insulating part is provided between the second element and the first member.