Light-Concentrating Structure for Image Sensor Thickness Reduction
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Solution Overview
Problem
Conventional image sensors require light-concentrating elements that increase their thickness, necessitating a design to reduce thickness while maintaining or enhancing photosensitivity.
Innovation Solution
A light-concentrating structure with an interconnection structure forming an opening and a light-concentrating recess groove, eliminating the need for separate light-concentrating devices by integrating them into the substrate and electrode layers, thereby reducing the overall thickness of the image sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light-concentrating elements are added to image sensors, then photosensitivity is enhanced, but the thickness of the sensor increases
Solution Approach 1:
The patent merges the light-concentrating function with the interconnection structure by forming the light-concentrating recess groove directly on the interconnection structure. This integration eliminates the need for separate light-concentrating elements, thereby enhancing photosensitivity without increasing sensor thickness.
Solution Approach 2:
The interconnection structure is designed to serve multiple functions: it provides electrical interconnection and simultaneously acts as a light-concentrating element through the integrated recess groove. This multi-functionality allows the same structure to both connect circuits and concentrate light, avoiding additional thickness.
2Illumination intensity
If separate light-concentrating devices are used, then light concentration is achieved, but device complexity increases
Solution Approach 1:
The patent combines the light-concentrating function with the interconnection structure into a single integrated component. The light-concentrating recess groove is formed directly on the interconnection structure, eliminating the need for separate light-concentrating devices and thereby reducing overall device complexity.
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 integrated light-concentrating structure enhances photosensitivity and reduces the thickness of the image sensor, enabling improved performance without the need for additional light-concentrating elements, such as in digital cameras for night photography.
Implementation Method 1
the interconnection structure is equipped on the substrate and the first electrode layer and is surrounding the dielectric layer, forming an opening and a light-concentrating recess groove
Data Source
AI summary
This invention provides a light-concentrating structure with photosensitivity enhancing effect, including the substrate, buried layer, first electrode layer, second electrode layer, dielectric layer and interconnection structure. The substrate is equipped with a housing space; the buried layer is arranged above the substrate with the housing space; the first electrode layer is arranged above the buried layer; the second electrode layer is arranged in the middle of the first electrode layer; the dielectric layer is arranged above the second electrode layer; the interconnection structure is arranged above the substrate and the first electrode layer surrounding the dielectric layer, which forms an opening and a light-concentrating recess groove.