Cell-Level Thermal Analysis in IC Design
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Solution Overview
Problem
In the IC design process, thermal runaway issues due to excessive temperatures can lead to device reliability problems, and existing methods often perform thermal analysis at the system level late in the process, making it difficult to identify and address thermal instability at the cell level effectively.
Innovation Solution
Performing thermal analysis at the cell or block level early in the IC design process using EDA tools to determine heating and cooling power characteristics, and modifying the structure or operating conditions of regions to achieve thermal stability, such as altering cell placement or adding dummy patterns to improve heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If thermal analysis is performed at the system level late in the IC design process, then the overall system thermal performance can be evaluated, but it becomes difficult to identify and address thermal instability at the cell level effectively
Solution Approach 1:
The patent segments the IC design process by performing thermal analysis at the cell level individually during the cell placement stage, rather than analyzing the entire system at once. This allows precise identification of thermally unstable cells while maintaining efficiency through early-stage analysis before routing is completed.
2Reliability
If thermal analysis is performed early in the IC design process at the cell level, then thermal instability can be identified and addressed effectively, but the complexity of the analysis process increases
Solution Approach 1:
The patent applies preliminary action by performing thermal analysis on individual cells during the cell placement stage, before the routing process is completed. This early detection allows thermal instability to be identified and addressed in thermally vulnerable regions before the overall system complexity increases, simplifying subsequent thermal management.
3Productivity
If cell placement is optimized for other parameters, then routing efficiency improves, but thermal stability may be compromised
Solution Approach 1:
The patent applies local quality by performing thermal analysis at the individual cell level and identifying specific thermally unstable cells. This allows targeted modifications to cell placement or structure in only those regions where thermal stability is compromised, rather than requiring global redesign of the entire IC layout for thermal management.
Data Source
AI summary
In a method, cell placement is performed to place a plurality of cells into a region of an integrated circuit (IC). A thermal analysis is performed to determine whether the region of the IC is thermally stable at an operating condition. In response to a determination that the region of the IC is thermally unstable, at least one of a structure or the operating condition of the region of the IC is changed. After the thermal analysis, routing is performed to route a plurality of nets interconnecting the placed cells. At least one of the cell placement, the thermal analysis, the changing or the routing is executed by a processor.