Accurate 3D Reconstruction of TGVs Using Hybrid Mesh–NURBS Modeling with Z-Axis Constraints and RL-Based Optimization

Not scheduled
20m
Lisbon

Lisbon

Portugal
Oral presentation

Speaker

Prof. Chao-Ching Ho (National Taipei University of Technology)

Description

Through-glass vias (TGVs) are critical for high-density semiconductor packaging; however, their internal waist geometry remains difficult to measure using non-destructive techniques. This study proposes an integrated 3D reconstruction framework combining NURBS-based parametric modeling, triangular mesh fitting, and Z-axis boundary constraints to ensure geometric accuracy. Experimentally acquired point cloud data are processed to generate high-fidelity 3D models, while a reinforcement learning (RL)-based digital twin simulation environment is developed to optimize inspection conditions and generate synthetic datasets. The proposed approach demonstrates high reconstruction accuracy and provides a robust solution for advanced metrology and inspection of TGV structures.

Authors

Mr Mu Fu (National Taipei University of Technology) Dr Pradeep Kumar (National Taipei University of Technology) Mr Eugene Su (National Taipei University of Technology) Prof. Chao-Ching Ho (National Taipei University of Technology) Prof. Liang-Chia Chen (National Taiwan University)

Presentation materials

Peer reviewing

Paper