| NUMERICAL SIMULATION |
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CRYSTAL PULLING EXPERIMENT |
| Quick and cheap. |
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Time consuming and expensive. |
| A simulation time varies from a few minutes to hours depending on the type of simulation. |
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A crystal growth takes some hours to few days. |
| Requires only a computer. |
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Requires specific hardware and material: adaptable furnace, quartz in quantity, gas, poly-silicon raw, etc. |
| Provides a detailed view of the process everywhere and at every growth stage. |
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Provides a restricted view only. |
| The inaccuracy of some material properties is a difficulty. |
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The reproducibility of a given growth quality is a difficulty. |
| Based on a mathematical model of the crystal growth process that includes assumptions and approximations. |
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The numerical simulation complements the crystal pulling experiments :
- in a first stage, the crystal pulling experiments are carried out to tune the numerical simulation parameters.
- in a second stage, the numerical simulation is used to determine the optimal crystal growth process parameters.
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