Semiconductor Pixel Metallic Filter Boundary Light Reflection
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Solution Overview
Problem
In imaging devices, the use of metallic plasmon filters for spectral regions leads to irregular light reflection into imaging regions, degrading the device's characteristics due to the boundary between imaging and spectral regions.
Innovation Solution
A semiconductor device with adjacent pixels, one having a metallic filter and the other not, incorporates a reflected light reduction unit to minimize light reflection on the sidewall of the metallic filter at their boundary, improving the device's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If metallic filters are used for spectral region pixels, then spectral imaging capability is improved, but light reflects irregularly at the boundary into imaging region pixels, degrading imaging characteristics
Solution Approach 1:
A black filter is introduced as an intermediary element at the boundary between spectral region pixels (with metallic filters) and imaging region pixels. This black filter absorbs light that would otherwise reflect irregularly from the metallic filter sidewalls into the imaging region, thereby eliminating the harmful reflection effect while preserving the spectral imaging capability of the metallic filters.
Solution Approach 2:
The black filter is selectively placed only at the boundary region between spectral and imaging pixels, rather than uniformly across the entire sensor. This localized application addresses the specific problem of boundary reflection interference without affecting the spectral imaging performance in the spectral region or the normal imaging function in other areas.
2Measurement precision
If metallic filters are used in pixels, then spectral detection is enhanced, but device complexity increases due to boundary region issues
Solution Approach 1:
The black filter serves as a simple intermediary structure that absorbs boundary reflections. Its implementation is straightforward - a layer of light-absorbing material positioned at the boundary region - which adds minimal structural complexity while effectively solving the reflection problem and preserving spectral detection precision.
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 enhances the imaging device's characteristics by reducing light interference and improving image quality by minimizing noise caused by reflected light.
Implementation Method 1
reflected light on a sidewall of the metallic filter enters the imaging region
Implementation Method 2
reflected light reduction unit that reduces reflected light on a sidewall of the metallic filter
Data Source
AI summary
The present technology relates to a semiconductor device and an electronic apparatus that are capable of improving the characteristics of a semiconductor device or an electronic apparatus that includes a pixel having a metallic filter and a pixel not having the metallic filter. A semiconductor device includes: a pixel unit in which a first pixel including a metallic filter and a second pixel not including the metallic filter are disposed adjacent to each other; and a reflected light reduction unit that reduces reflected light on a sidewall of the metallic filter at a boundary portion between the first pixel and the second pixel. The present technology can be applied to an image sensor that includes a narrowband pixel including a plasmon filter and a normal pixel including a color filter, for example.