用自适应贝叶斯优化提升焊点可靠性设计效率,节省一半计算成本。
Adaptive Bayesian Data-Driven Design of Reliable Solder Joints for Micro-electronic Devices
- 基于自适应超参数的贝叶斯优化,融合多采集函数策略
- 在相同计算预算下比传统方法平均提升3%性能,节省50%算力
- 适合需要高效仿真优化的微电子可靠性设计场景
焊点在热机械载荷下的可靠性是微电子器件中关键但物理机制复杂的工程问题,模拟行为通常计算成本高昂。在数据驱动趋势下,贝叶斯优化(BO)结合高斯过程回归成为主流方法。本文提出一种新型启发式框架,实现优化过程中自适应调整超参数,充分利用代理模型并基于多个采集函数选择设计候选。该方法在合成目标最小化任务中表现优于最差的传统贝叶斯方案。以焊点可靠性为实际案例,通过最小化循环热载荷下的非线性蠕变应变累积,结果显示:在任意给定计算预算阈值下,自适应BO平均优于常规BO 3%,同时可节省50%的计算开销。该结果验证了自适应贝叶斯方法在提升性能与降低优化成本方面的潜力。为促进可复现性,代码已开源。
原文摘要 · Abstract (English)
Solder joint reliability related to failures due to thermomechanical loading is a critically important yet physically complex engineering problem. As a result, simulated behavior is oftentimes computationally expensive. In an increasingly data-driven world, the usage of efficient data-driven design schemes is a popular choice. Among them, Bayesian optimization (BO) with Gaussian process regression is one of the most important representatives. The authors argue that computational savings can be obtained from exploiting thorough surrogate modeling and selecting a design candidate based on multiple acquisition functions. This is feasible due to the relatively low computational cost, compared to the expensive simulation objective. This paper addresses the shortcomings in the adjacent literature by providing and implementing a novel heuristic framework to perform BO with adaptive hyperparameters across the various optimization iterations. Adaptive BO is subsequently compared to regular BO when faced with synthetic objective minimization problems. The results show the efficiency of adaptive BO when compared any worst-performing regular Bayesian schemes. As an engineering use case, the solder joint reliability problem is tackled by minimizing the accumulated non-linear creep strain under a cyclic thermal load. Results show that adaptive BO outperforms regular BO by 3% on average at any given computational budget threshold, critically saving half of the computational expense budget. This practical result underlines the methodological potential of the adaptive Bayesian data-driven methodology to achieve better results and cut optimization-related expenses. Lastly, in order to promote the reproducibility of the results, the data-driven implementations are made available on an open-source basis.
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