Stacked Substrate Power Layout for Crosstalk-Safe Semiconductor Circuits
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Solution Overview
Problem
Crosstalk between stacked substrates in semiconductor devices leads to noise contamination and deterioration of operation accuracy, particularly in photoelectric conversion devices, due to power supply variations affecting circuit performance.
Innovation Solution
A semiconductor device with a first substrate and a second substrate, where the second substrate supplies driving voltages to the first substrate via connecting portions, and control signals are input through these connections, ensuring power and reference voltages are shared between the substrates to minimize crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple substrates are stacked to increase functionality and reduce light receiving area, then device functionality and integration are improved, but crosstalk between substrates increases causing noise contamination
Solution Approach 1:
The patent segments the power supply system by providing separate power supply connections for each substrate. The first substrate receives power through first power supply connections, while the second substrate receives power through second power supply connections, isolating their power networks to prevent crosstalk while maintaining high functionality through vertical integration
Solution Approach 2:
The patent introduces an intermediary power supply structure that mediates between the two substrates. By using separate power supply paths and isolation structures, the system prevents direct electrical interference between substrates while still allowing functional integration through controlled connections
2Ease of operation
If power supply connections are made between substrates to enable functionality, then device operation is enabled, but power supply variations affect circuit performance
Solution Approach 1:
The power supply system is segmented into independent networks for each substrate. The first substrate has its own power supply connections separate from the second substrate's power supply connections, preventing power supply variations on one substrate from affecting the other substrate's circuit performance
Solution Approach 2:
The patent establishes equipotential power supply networks for each substrate by providing dedicated power supply connections. This ensures that each substrate operates at a stable reference potential independent of the other substrate's power consumption variations, maintaining reliable circuit operation
Data Source
AI summary
A semiconductor device includes a first substrate provided with a first circuit unit, and a second substrate provided with a second circuit unit connected to the first circuit unit and a third circuit unit connected to the second circuit unit. The second circuit unit is configured to supply a driving voltage to the first circuit unit, and at least a part of driving voltages of the second circuit unit is configured to be supplied from the first substrate to the second circuit unit.