Solid-State Imaging Pixel Terminal Layout for Noise Shielding
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Solution Overview
Problem
Current solid-state imaging devices face challenges in improving electric reliability and noise resistance between adjacent pixels, particularly in the bonding of through wiring lines between stacked substrates.
Innovation Solution
The implementation of a solid-state imaging device design that includes specific arrangements of signal and shield terminals on opposite surfaces of the substrates, where the shield terminals are positioned to form a shield region between adjacent pixels, reducing noise and enhancing bonding reliability by minimizing terminal area differences and pattern dependency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shield terminals are added to suppress noise between adjacent pixels, then noise resistance performance is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies asymmetry by positioning shield terminals at specific asymmetric locations relative to signal terminals. The shield terminals are placed at displaced positions in the second direction, creating an asymmetric shield region that effectively blocks noise paths from adjacent pixels while maintaining manufacturing feasibility. This asymmetric arrangement provides optimal noise shielding without requiring symmetric complexity throughout the entire terminal structure.
Solution Approach 2:
The patent segments the shielding function by introducing separate shield terminals distinct from signal terminals. These shield terminals are supplied with fixed potential and positioned to form discrete shield regions between adjacent pixels. This segmentation allows the shielding function to be independently optimized and manufactured, reducing overall device complexity while improving noise resistance.
2Reliability
If shield terminals are positioned to form effective shield regions, then noise suppression is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-positioning shield terminals at specific displaced locations in the second direction relative to signal terminals. This preliminary positioning creates predetermined shield regions that are optimized for noise suppression. The fixed potential supply to shield terminals further prepares the structure in advance to block noise paths, reducing the need for high-precision adjustments during operation or final assembly.
Solution Approach 2:
The patent applies local quality by concentrating shielding resources specifically in regions where noise suppression is most critical - between adjacent pixels. The shield terminals are positioned to form localized shield regions at specific displaced positions, rather than uniformly distributing shielding throughout the entire device. This localized approach improves noise suppression where needed while reducing overall manufacturing precision requirements.
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 design effectively suppresses noise between pixels, improves noise resistance, and ensures reliable terminal bonding, thereby enhancing the electric reliability of the imaging device.
Implementation Method 1
a first shield terminal that is provided in a region corresponding to a side of a second pixel of a peripheral portion of the first pixel... and is supplied with a fixed potential; and a second shield terminal that is provided in a region corresponding to a side of the first pixel of a peripheral portion of the second pixel... and is supplied with a fixed potential
Data Source
AI summary
A solid-state imaging device and an electronic apparatus include: a first pixel provided on a side of a first surface serving as a side from which light enters of a first base, and a second pixel that is disposed in a first direction on the first surface to be adjacent to the first pixel; a first signal terminal that is provided in a region corresponding to a center portion of the first pixel on a side of a second surface of the first base and is coupled to the first pixel; a second signal terminal that is provided in a region corresponding to a center portion of the second pixel and is coupled to the second pixel; a first shield terminal that is provided in a region corresponding to a side of the second pixel of a peripheral portion of the first pixel on the side of the second surface; and a second shield terminal that is provided in a region corresponding to a side of the first pixel of a peripheral portion of the second pixel on the side of the second surface and is provided in a region displaced in a second direction with respect to the first shield terminal.