Photoelectric Conversion Apparatus Vertical Stacking Circuit Coupling
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Solution Overview
Problem
In photoelectric conversion apparatuses where a light-receiving circuit and a vertical scanning circuit are formed on different substrates, the resistance value of electrically conductive lines can increase due to proximity effects, leading to coupling issues between conductive members and lines, which affects the performance of the apparatus.
Innovation Solution
The apparatus is designed with a specific arrangement where the second substrate's circuit, overlapping the driving lines, includes an electrically conductive line for power or signal transfer, reducing the influence of conductive members on other lines by strategically positioning the vertical scanning circuits and conductive lines to minimize coupling and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the electrically conductive line is made thinner to reduce its influence on nearby conductive members, then the coupling between conductive members and lines is reduced, but the resistance value of the electrically conductive line increases
Solution Approach 1:
The patent introduces a third dimension (vertical stacking) by forming the second circuit and electrically conductive line on a second substrate bonded to the first substrate. This spatial separation in the vertical dimension allows the electrically conductive line to be positioned directly over the driving line it controls, minimizing horizontal proximity effects and coupling with other conductive members while maintaining low resistance through optimized vertical routing and bonding interface design.
Solution Approach 2:
The patent applies different design strategies to different parts of the conductive line system. The electrically conductive line is made thinner in regions where coupling reduction is critical, while maintaining adequate width in regions where resistance is the primary concern. The bonding interface between substrates is designed with enhanced conductive properties to compensate for thinner line sections, achieving local optimization of both coupling and resistance characteristics.
2Reliability
If the electrically conductive line is made thinner to reduce resistance, then the resistance value decreases, but coupling between the electrically conductive member and the electrically conductive line increases
Solution Approach 1:
By transitioning to vertical stacking with the second substrate bonded to the first, the patent enables the electrically conductive line to be positioned directly over the driving line in the vertical dimension. This eliminates horizontal proximity coupling issues that would arise from thinning the line, as the conductive line and driving line are separated in the horizontal plane while maintaining electrical connection through the vertical bonding interface.
3Productivity
If the vertical scanning circuit and light-receiving circuit are formed on different substrates, then the layout flexibility and signal transfer efficiency are improved, but the complexity of bonding and alignment between substrates increases
Solution Approach 1:
The patent utilizes vertical stacking to separate the light-receiving circuit and vertical scanning circuit onto different substrates bonded in the third dimension. This approach improves signal transfer efficiency by providing dedicated vertical routing paths while managing bonding complexity through precise alignment features and standardized bonding interfaces that enable automated assembly processes.
Solution Approach 2:
The patent divides the photoelectric conversion apparatus into multiple functional substrates: the first substrate containing the light-receiving array and driving lines, and the second substrate containing the vertical scanning circuit and electrically conductive lines. This segmentation allows independent optimization of each substrate's layout and manufacturing process while maintaining efficient inter-substrate signal transfer through controlled bonding interfaces.
Data Source
AI summary
A photoelectric conversion apparatus comprises a first substrate having a light-receiving array and a plurality of driving lines for supplying control signals to the array and a second substrate having a first circuit that includes a driver circuit group configured to generate the control signals and is configured to function as a vertical scanning circuit which supplies the control signals to at least some of the driving lines and a second circuit including a circuit group having the same arrangement as that of the driver circuit group. The second circuit overlaps the at least some driving lines. The at least some driving lines include a driving line not electrically connected to the second circuit. The second substrate includes, at a position overlapping the second circuit, an electrically conductive line used for power supply or transfer of a signal different from the control signals.