From Wafers to Panels: Overcoming Lithography Challenges in Advanced Packaging
AI-summarised brief · reviewed before publication
AI‑driven custom silicon from ETEL and HEIDENHAIN is advancing high‑density advanced packaging, enabling finer‑pitch fan‑out interconnects, TSVs, and RDLs. Packaging lithography, unlike front‑end processes, operates at ~1 µm features, making overlay accuracy, throughput, and thermal stability critical as substrates grow from 300 mm wafers to 600 × 600 mm panels. The authors detail motion stages that maintain horizontal straightness within ±150 nm and vertical straightness within ±120 nm at scan speeds up to 1,000 mm/s over 300 mm. They also describe water‑cooled glider interfaces, magnetic paths, and thermally decoupled encoder scales to mitigate overlay drift from motor heat and temperature swings, ensuring stable metrology loops during extended production runs.
💡 Why It Matters
- · The precision and thermal control strategies outlined enable reliable scaling of advanced packaging to larger panels, directly supporting the semiconductor industry's push toward higher integration densities and faster production cycles.
