Packaging Thermal and Mechanical Analysis Internship - Summer 2027
Lightmatter · Mountain View, CA
About this role
**Lightmatter — Packaging Thermal and Mechanical Analysis Internship (Summer 2027)** Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, *Passage™*, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for advanced AI and HPC workloads. --- ## About this job Join Lightmatter’s Packaging team to build the foundation of an AI-enabled framework that helps engineers quickly explore package design options and narrow candidates before committing to detailed simulation or hardware builds. You’ll combine physics-based simulation with machine learning—including physics-informed neural networks (PINNs) and other surrogate models—to make fast early predictions that stay physically grounded. Initial use cases include narrowing thermal solutions and predicting warpage, with room to extend to other objectives. Your work will feed into upcoming products, POCs, and test vehicles from day one, building fundamental understanding of coupled thermal-structural-optical physics. You’ll be mentored by experienced thermal and thermo-mechanical engineers and learn how first-order analysis, AI surrogates, and high-fidelity simulation complement each other in early design decisions. --- ## Responsibilities - Build a flexible framework linking package design parameters (geometry, materials, process, thermal solution) to outputs such as thermal performance and warpage. - Develop and evaluate PINNs, other surrogate models, and reduced-order/analytical models for fast first-order predictions on new package concepts. - Automate FEA and CFD setup, execution, and post-processing in Python to generate parametric datasets; train/validate models against high-fidelity simulation and hardware data, quantifying accuracy and uncertainty. - Plan and run physical DOEs (test setup, measurement, analysis) to build understanding of coupled thermal-structural-optical physics. - Partner with packaging, thermal, and thermo-mechanical engineers to define requirements and inputs/outputs, and adapt the framework to upcoming products. --- ## Requirements - Currently pursuing an MS or PhD in Mechanical Engineering or a related field. - Coursework in heat transfer, fluid mechanics, FEA, CFD, numerical methods, and solid or fracture mechanics. - Graduate research in multi-physics problems, with both modeling and experimental validation. - Experience with thermal (Icepak, Fluent, Flotherm) and structural (Ansys, Abaqus, COMSOL) simulation tools. - Proficiency in Python (or similar) for scripting, data processing, and simulation automation. - Curiosity and willingness to learn from the team. --- ## Preferred Qualifications - Graduate research in electronic or semiconductor packaging. - Familiarity with thermal-structural coupling, warpage, and package-level thermal management. - Coursework in packaging, numerical methods, or machine learning. - Experience with PINNs, scientific ML, or surrogate modeling of FEA/CFD data using PyTorch, TensorFlow, or JAX. - Interest in photonics and co-packaged optics. --- ## Pay (Hourly Rate) **$53–$57 USD/hour** (standard pay determined based on position, location, year in school, degree, and experience). --- ## Benefits - Comprehensive Health Care Plan (Medical, Dental & Vision) - Retirement Savings Matching Program - Life Insurance (Basic, Voluntary & A
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