Advanced Packaging Limits Come into Focus
2 days ago
- #Advanced Packaging
- #Mechanical Limits
- #Process Control
- Moore's Law shift towards advanced packaging is reaching limits due to mechanical and process-control issues.
- AI and HPC designs are pushing barriers in package mechanics, including warpage, glass fragility, hybrid-bond yield, and substrate limitations.
- Packaging is now central to system performance, affecting power delivery, thermals, interconnect density, and process sequence.
- System architecture drives performance, making packaging a key part of the performance equation rather than a downstream detail.
- Warpage is a critical issue driven by thermo-mechanical CTE mismatch, stiffness imbalances, and material asymmetry in larger packages.
- Glass carriers reduce warpage due to flatness and CTE matching with silicon but introduce brittleness and edge damage risks.
- Hybrid bonding faces challenges as pitch shrinks, transitioning from defect-driven to stress-driven yield issues, with sensitivity to contamination and stress.
- Backside handling becomes more critical with thinner dies, where temporary bonding uniformity and grinding precision affect alignment and yield.
- Substrate shortages reflect not only supply issues but also limitations in traditional platforms for larger, more complex modules, driving interest in panel-scale processing.
- The industry's scaling depends on holistic process integration across materials, mechanical behavior, thermal history, and yield management.