Deposition Simulation uses computational models to predict thin film growth, enabling process optimization before expensive experimental runs.
## What Is Deposition Simulation?
- Physics: Models surface kinetics, gas transport, plasma chemistry
- Outputs: Film thickness, uniformity, composition profiles
- Software: COMSOL, Silvaco ATHENA, Synopsis TCAD
- Scale: Reactor-level to atomic-level models
## Why Deposition Simulation Matters
A single CVD tool costs $5-20M. Simulation reduces trial-and-error experimentation, accelerating process development and improving uniformity.
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Deposition Simulation Hierarchy:
Equipment Level: Feature Level:
┌─────────────┐ ┌───────────┐
│ Gas flow │ │ Surface │
│ Temperature │ → │ reactions │
│ Pressure │ │ Step │
│ Power │ │ coverage │
└─────────────┘ └───────────┘
Continuum Kinetic
(CFD, thermal) (Monte Carlo)
Simulation Types:
| Model | Physics | Application |
|-------|---------|-------------|
| CFD | Gas dynamics | Uniformity prediction |
| Kinetic MC | Surface reactions | Conformality |
| Plasma model | Ion/radical transport | PECVD/PVD |
| MD | Atomic interactions | Interface quality |