Conference Agenda
Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
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GEOM: Geometric Modeling & Processing
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Thermo-Mechanical Stress Analysis of SiN Passivation Induced by Manufacturing Processes in Power Semiconductor Devices 1: Universita' di Catania; 2: STMicroelectronics; 3: Universita' di Messina Silicon nitride (SiN) passivation layers play a crucial role in ensuring the long-term reliability of power semiconductor devices by protecting sensitive regions from environmental and electrical stresses. However, thermo-mechanical loads induced during fabrication and as sembly processes can generate significant stresses within the passivation stack, potentially leading to crack initiation and reliability degradation. In this work, a finite element-based thermo-mechanical analysis is per formed to qualitatively assess the stress state induced in a SiN passi vation scheme by three key manufacturing steps: SiN deposition, die sintering, and package-level (STPAK) sintering. Simplified geometrical models and material descriptions are adopted to isolate the contribu tion of each process and to rank their relative impact. Results indicate that SiN deposition, dominated by intrinsic and thermal stresses due to cooling from deposition temperature, is by far the most critical pro cess, generating stresses exceeding 500 MPa at room temperature. In contrast, die and package sintering processes produce comparatively mi nor stress variations. The study provides useful design-oriented insights for process optimization and reliability-aware passivation design, while clearly identifying the limits of quantitative interpretation. Data-Driven Parametric CAD Modeling of Geometric Variability with Correlated Variables 1: Laboratory of Design Methods and Tools in Industrial Engineering, Department of Civil, Environmental and Architectural Engineering, University of Padova, Via Venezia 1, 35131 Padova Italy; 2: Department of Industrial Engineering, Via Venezia 1, 35131, Padova, Italy; 3: Department of Management and Engineering, University of Padova, Stradella San Nicola 3, 36100 Vicenza Italy This paper proposes a statistical CAD modeling framework to generate par-ametric geometries representative of manufacturing variability based on measurement data. The method combines distribution fitting and percentile-based modeling of design variables with correlation information to reproduce realistic relationships among geometric parameters. In contrast with Principal Component Analysis approaches, the proposed framework preserves the original CAD design variables, preserving the physical interpretability of the original CAD design variables and enabling direct interpretation. The meth-odology is implemented through an automated workflow that generates sta-tistically consistent CAD instances by propagating deviations according to the extracted correlation matrix. A case study on a machined component is presented to demonstrate the capability of the approach to capture process-dependent variability and correlated behavior among parameters. The results confirm that the proposed method can generate statistically representative CAD models suitable for simulation-driven analyzes. Gaussian Splatting for 3D Data Representation: A Survey of Methods and Applications in Industrial Engineering, Biomedicine, and Cultural Heritage University of L'Aquila, Italy This review examines 3D Gaussian Splatting as an emerging explicit representation for 3D reconstruction and real-time novel-view synthesis, with emphasis on industrial engineering, biomedical imaging, and cultural heritage. The core principles of Gaussian-based scene modeling are summarized, and recent methods are organized into static reconstruction, dynamic modeling, efficiency-oriented approaches, and learning-based extensions. The 3DGS role is assessed against photogrammetry, mesh-based workflows, and neural implicit fields in terms of rendering efficiency, geometric fidelity, metric reliability, scalability, and interoperability. Application-specific evidence is then analyzed in medical visualization and surgical scene reconstruction, cultural heritage digitization and restoration, and industrial inspection and digital twins, highlighting domain-specific opportunities, maturity levels, and adoption barriers. Open challenges remain in geometric accuracy, standardization, data exchange, and downstream integration. 3DGS emerges as a promising but still maturing explicit representation for application-specific 3D data visualization, documentation, inspection, exchange, and analysis. Improving access to education by design: the Geo3DTouch Project 1: Department of Industrial Engineering of Florence, University of Florence,Via di S. Marta 3, 50139 Firenze, Italy; 2: Department of Applied Didactics, University of Santiago, Avda. Xoan XXIII, 15782 Santiago de Compostela, Spain; 3: Department of Mathematics, University of Almería, 04120 Almería, Spain The Geo3DTouch project addresses equitable access to STEAM education for blind and visually impaired people (BVIP) through inclusive design. This article presents the project’s multi-disciplinary frameworks across three innovative tracks: computational tactile reconstruction using AI-driven and deterministic models to convert 2D visual data into highly intelligible 3D tactile bas-reliefs; ac-cessible 3D modeling utilizing a custom Braille plugin for Tinkercad and Blender to empower pre-service teachers to design tactile geometric aids; and inclusive immersive environments through Neotrie VR, which utilizes high-contrast inter-faces and Mixed Reality to foster embodied spatial reasoning for low-vision learners. User testing and pilot interventions validate that integrating physical re-lief, structured CAD workflows, and immersive digital adaptations significantly enhances shape recognition, spatial orientation, and classroom engagement. Ulti-mately, these findings offer a scalable methodology for future multisensory and accessible STEAM learning ecosystems. Conceptual Design of a Unified Framework for Integrated Data Transfer and Analysis 1: Consorzio CREATE, Via Claudio 21, Napoli, 80125, Italy; 2: Department of Engineering and Architecture, University of Trieste, Via Alfonso Valerio, 6/1, Trieste, 34127, Italy Data transfer between non-conforming meshes arises in multiple engineering and scientific domains, yet existing methods often decouple interpolation from error assessment and lack a unified treatment of visualization and quality control. This paper presents MeshMapX (MMX), a methodological framework that integrates conservative interpolation, error metrics, interpolation analysis, and interactive visualization in a single environment. MMX is capable of diagnosing and exposing critical aspects of the transfer process that would otherwise go unnoticed. Built-in error metrics and mesh-map visualization provide direct feedback on conservation quality, spatial distribution of errors, and unmapped regions. An optimization module is also envisioned as part of the framework, though it remains under development. As a case study, MMX is applied to the transfer of electromagnetic load data onto the structural mesh of the DTT (Divertor Tokamak Test facility) divertor cassette, a representative multiphysics problem in nuclear fusion research. The analysis demonstrates how MMX successfully identifies the root cause of force balance discrepancies — namely, geometric differences between the source and target models — which would have been difficult to detect without integrated diagnostic tools. MMX offers a transparent and extensible solution for error-aware, conservative data transfer, independent of the specific physical domain. A Multi-View Deep Learning Framework for CAD Command Sequence Reconstruction Politecnico di Milano, Italy This work introduces RE-CAD, a pipeline that converts multiview images into editable Computer-Aided Design (CAD) command sequences. Building on ARE-Net and DeepCAD, it addresses the lack of recoverable CAD design procedures and the scarcity of paired image–CAD sequence data. A synthetic multi-view dataset was therefore generated from DeepCAD models using an automated Blender pipeline, with a black background and a High-Dynamic-Range imaging (HDRI) variant; the latter adds ray tracing, reflections, and depth blur to approximate real-world imaging conditions. The architecture uses a pretrained ResNet-18 encoder to process 12 views per object, a Gated Recurrent Unit (GRU) pooler to aggregate their features, and the pretrained DeepCAD decoder. The encoder–pooler was trained by Mean Squared Error (MSE) against 256-dimensional target vectors produced by the pretrained DeepCAD encoder. Hyperparameters were optimized through two Optuna studies, followed by multiple training sessions and 5-fold cross-validation. The reported losses evaluate latent-space alignment, not command validity or geometric reconstruction accuracy. Validation loss plateaued while training loss decreased; an exploratory comparison also showed a lower, more stable trend in validation loss for the 8% subset than for the 5% subset. | ||
