Semiconductor Power Switch Layout for IR Drop Balancing
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Solution Overview
Problem
In semiconductor devices, differences in wiring resistance and terminal densities lead to variations in power supply capability across regions, causing IR drops and uneven power delivery.
Innovation Solution
The semiconductor device incorporates a dual power switch circuit configuration with higher power supply capability in regions with lower terminal densities, using larger switch transistors and adjusting terminal and wiring densities to equalize power supply across regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power supply terminals are arranged at high density in a region, then the power supply capability in that region is improved, but the wiring resistance increases causing IR drops
Solution Approach 1:
The patent applies local quality by configuring different power supply terminal densities in different regions. The first region has a first density of power supply terminals, while the second region has a second density that is lower than the first density. This non-uniform distribution optimizes the balance between power supply capability and IR drop prevention for each specific region's requirements.
Solution Approach 2:
The patent changes the parameter of terminal density across different regions. By adjusting the density parameter from high in the first region to low in the second region, the patent optimizes power distribution characteristics and mitigates IR drops in high-density areas while maintaining adequate power supply in lower-density areas.
2Power
If multiple power switch circuits are provided with different power supply capabilities, then the power distribution is optimized across regions, but the device complexity increases
Solution Approach 1:
The patent implements local quality by providing different types of power switch circuits in different regions. The first power switch circuits in the first region have different power supply capabilities compared to the second power switch circuits in the second region. This allows each region to have power switch circuits tailored to its specific power distribution requirements, optimizing overall power distribution while managing complexity through regional specialization.
Data Source
AI summary
A semiconductor device includes first and second power lines; a circuit region including a first region in which first power supply terminals connected to the first power line are arranged at a first density, and a second region in which second power supply terminals connected to the first power line are arranged at a second density lower than the first density; first power switch circuits arranged in the first region and connecting the first and second power lines; and second power switch circuits arranged in the second region and connecting the first and second power lines. A second power supply capability to the second power line by a circuit including the first power line and the second power switch circuits is higher than a first power supply capability to the second power line by a circuit including the first power line and the first power switch circuits.