Reticulated Circuit Board Layout for Pixel Signal Noise Suppression
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Solution Overview
Problem
Existing solutions for suppressing noise in solid-state imaging devices, such as CMOS image sensors, are inadequate as they either fail to address hot carrier light emission or only partially mitigate inductive noise, leading to suboptimal image quality due to residual noise in pixel signals.
Innovation Solution
A circuit board and semiconductor device design featuring a reticulated conductor configuration with specific periodic widths and movements of conductor groups, which effectively shields both hot carrier light emission and inductive noise by orthogonalizing the magnetic flux directions, thereby reducing noise in pixel signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If two-layer reticulated wiring is arranged to cancel magnetic flux, then inductive noise is suppressed, but hot carrier light emission shielding is not considered
Solution Approach 1:
The reticulated conductor structure is designed to simultaneously perform multiple functions: canceling magnetic flux to suppress inductive noise and shielding hot carrier light emission. By integrating both noise suppression mechanisms into a single conductor arrangement, the solution achieves comprehensive protection against multiple noise sources without requiring separate structures for each function.
Solution Approach 2:
The patent combines the magnetic flux cancellation function and light emission shielding function into a unified reticulated conductor configuration. The first and second conductors are arranged to work together for both electromagnetic interference suppression and optical shielding, merging previously separate solutions into one integrated structure.
2Object-affected harmful factors
If light-shielding structure is provided to wiring, then hot carrier light emission noise is suppressed, but inductive noise from conductor loops is not addressed
Solution Approach 1:
The reticulated conductor structure is designed to simultaneously perform multiple functions: canceling magnetic flux to suppress inductive noise and shielding hot carrier light emission. By integrating both noise suppression mechanisms into a single conductor arrangement, the solution achieves comprehensive protection against multiple noise sources without requiring separate structures for each function.
Solution Approach 2:
The patent combines the magnetic flux cancellation function and light emission shielding function into a unified reticulated conductor configuration. The first and second conductors are arranged to work together for both electromagnetic interference suppression and optical shielding, merging previously separate solutions into one integrated structure.
3Ease of operation
If conductor loop is formed using control line and signal line, then pixel signal transmission is enabled, but inductive noise is generated due to magnetic flux from nearby wiring
Solution Approach 1:
The reticulated conductor structure acts as an intermediary between the control line and signal line, providing magnetic flux cancellation that protects the pixel signal transmission path from inductive noise generated by nearby wiring. The first and second conductors work together to create a shielding effect that allows signal transmission while blocking harmful electromagnetic interference.
4Adaptability or versatility
If active elements are arranged inside solid-state imaging device, then device functionality is achieved, but hot carrier light emission is generated that leaks into photoelectric conversion unit
Solution Approach 1:
The reticulated conductor structure acts as an intermediary between the active elements and the photoelectric conversion unit, providing optical shielding that prevents hot carrier light emission from the active elements from reaching and interfering with the photoelectric conversion unit, while still allowing the active elements to perform their intended functions.
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 proposed solution significantly suppresses the generation of noise in signal outputs from solid-state imaging devices, enhancing image quality by effectively canceling induced electromotive forces and shielding hot carrier light emission, leading to improved image fidelity.
Implementation Method 1
a technique of providing a light-shielding structure to wiring formed between the active element and a photoelectric conversion unit
Implementation Method 2
inductive noise may be generated in the pixel signal due to induced electromotive force caused by a magnetic field generated due to the internal configuration of the solid-state imaging device
Implementation Method 3
there is a method of canceling a generated magnetic flux by arranging wiring that generates the magnetic flux inside the electronic device as two-layer reticulated wiring
Data Source
AI summary
The present technology relates to a circuit board, a semiconductor device, and an electronic device for enabling effective suppression of generation of noise in a signal. The circuit board includes a reticulated conductor including a first conductor group configured by two or more conductors having a first conductor width and arranged with a first periodic width in a first direction, a second conductor group configured by two or more conductors having a second conductor width and arranged with a second periodic width in a second direction orthogonal to the first direction, and a first moving conductor group arranged at a position to which at least a part of the second conductor group is moved by a factor of 1 of the first periodic width in the first direction and is moved by a factor of 1 of a third periodic width in the second direction, the third periodic width and the second periodic width being different. The present technology can be applied to, for example, a circuit board of a semiconductor device.