Photoelectric Conversion Apparatus Stacked Substrate Layout
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Solution Overview
Problem
Existing photoelectric conversion apparatuses lack detailed two-dimensional layouts of pads and wiring layers, which hinders efficient signal processing and transmission in overlayed substrate configurations.
Innovation Solution
A photoelectric conversion apparatus is designed with specific two-dimensional layouts where the first substrate includes a photoelectric conversion element and conductive portions for signal transmission, while the second substrate includes conductive portions for processing signals, ensuring efficient electrical connection and signal processing through overlapping surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pads on both substrates are brought into contact to electrically connect circuits, then electrical connection between substrates is achieved, but detailed two-dimensional layout optimization is lacking which hinders efficient signal processing
Solution Approach 1:
The patent transitions from conventional two-dimensional pad layouts to a three-dimensional stacked substrate architecture. By overlaying a first substrate containing photoelectric conversion elements with a second substrate containing circuit components vertically, the invention achieves efficient electrical connection through vertical stacking while enabling optimized signal processing pathways that combine both vertical inter-substrate connections and horizontal in-substrate routing.
Solution Approach 2:
The patent introduces carefully designed pad structures as intermediary elements between the first and second substrates. These pads serve as mediation points that facilitate efficient signal transfer from photoelectric conversion elements through conductive patterns on both substrates, optimizing the interface between light-sensitive components and processing circuits.
2Productivity
If conductive portions are optimized in area and layout, then signal processing efficiency is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The patent divides the photoelectric conversion apparatus into functionally distinct segments: a first substrate containing photoelectric conversion elements and conductive patterns, and a second substrate containing circuit components and additional conductive patterns. This segmentation allows independent optimization of each substrate's layout while maintaining overall system efficiency, reducing the complexity of manufacturing precision requirements compared to a fully integrated single-substrate design.
Solution Approach 2:
The patent applies different design optimizations to different regions and layers of the device. The first substrate is optimized for photoelectric conversion with appropriate pad sizes and conductive pattern densities, while the second substrate is optimized for signal processing with different conductive pattern configurations. This localized optimization allows each substrate to be manufactured with precision requirements matched to its specific functional needs.
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 signal processing efficiency by optimizing the area and layout of conductive portions, enabling effective transmission and processing of signals generated by photoelectric conversion elements, applicable to solid-state image capturing, distance measurement, and light amount measurement.
Implementation Method 1
a first substrate and a second substrate are overlaid on each other such that a first surface of the first substrate and a second surface of the second substrate are brought into contact with each other. The first substrate includes a photoelectric conversion element
Data Source
AI summary
A photoelectric conversion apparatus having a first substrate and a second substrate overlaid on each other and including electrically conductive portions is provided. The first substrate includes a photoelectric conversion element, a first portion configured to form part of a first surface, a second portion which is included in an electrically conductive pattern closest to the first portion, and a third portion which is included in an electrically conductive pattern second closest to the first portion. The second substrate includes a fourth portion configured to form part of a second surface, and a circuit. In a planar view with respect to the first surface, an area of the first portion is smaller than an area of the second portion and larger than an area of a portion of the third portion overlaying the second portion.