arXiv:2511.12788cs.LGcs.AR2025-11

用物理约束的自适应神经网络,仅用50样本实现纳米级光刻优化。

Physics-Constrained Adaptive Neural Networks Enable Real-Time Semiconductor Manufacturing Optimization with Minimal Training Data

  • 融合物理模型与可学习参数,自动校准电磁近似
  • 仅用50样本即达0.664-2.536纳米边缘误差,提升69.9%
  • 适合需要实时优化的半导体制造场景

半导体行业在极紫外(EUV)光刻优化中面临计算危机,传统方法耗时数十亿CPU小时却无法实现亚纳米级精度。本文提出一种物理约束的自适应学习框架,通过可学习参数θ = {θ_d, θ_a, θ_b, θ_p, θ_c}自动校准电磁近似,同时最小化模拟曝光图像与目标光罩间的边缘定位误差(EPE)。该框架集成可微分的菲涅尔衍射、材料吸收、光学点扩散函数模糊、相移效应及对比度调制模块,并直接以几何图案匹配为目标,实现跨几何泛化,仅需少量训练数据。在涵盖当前生产到未来研发节点的15个代表性图案上,仅使用每类50个训练样本,即达成0.664-2.536纳米范围内的稳定亚纳米级EPE表现。相比无物理约束的CNN基线,自适应物理学习平均提升69.9%,推理速度远超严格电磁求解器。相较依赖特定图案的CNN训练,本方法通过跨几何泛化减少90%训练样本需求。该工作确立了物理约束自适应学习作为实时半导体制造优化的基础方法,弥合了学术界物理信息神经网络与工业部署之间的关键鸿沟。

原文摘要 · Abstract (English)

The semiconductor industry faces a computational crisis in extreme ultraviolet (EUV) lithography optimization, where traditional methods consume billions of CPU hours while failing to achieve sub-nanometer precision. We present a physics-constrained adaptive learning framework that automatically calibrates electromagnetic approximations through learnable parameters $\boldsymbolθ = \{θ_d, θ_a, θ_b, θ_p, θ_c\}$ while simultaneously minimizing Edge Placement Error (EPE) between simulated aerial images and target photomasks. The framework integrates differentiable modules for Fresnel diffraction, material absorption, optical point spread function blur, phase-shift effects, and contrast modulation with direct geometric pattern matching objectives, enabling cross-geometry generalization with minimal training data. Through physics-constrained learning on 15 representative patterns spanning current production to future research nodes, we demonstrate consistent sub-nanometer EPE performance (0.664-2.536 nm range) using only 50 training samples per pattern. Adaptive physics learning achieves an average improvement of 69.9\% over CNN baselines without physics constraints, with a significant inference speedup over rigorous electromagnetic solvers after training completion. This approach requires 90\% fewer training samples through cross-geometry generalization compared to pattern-specific CNN training approaches. This work establishes physics-constrained adaptive learning as a foundational methodology for real-time semiconductor manufacturing optimization, addressing the critical gap between academic physics-informed neural networks and industrial deployment requirements through joint physics calibration and manufacturing precision objectives.

光刻优化物理约束神经网络半导体

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