# Finite Difference Time Domain Photonic Structure

Pyanodons item · internal name `fdtd` · stack size 100 · first craftable in tier 7 (Production science pack, [tier 7](https://factorio.kalzumeus.com/tier/7.md))
HTML page: https://factorio.kalzumeus.com/item/fdtd/

## Produced by (1 recipes)

### Finite Difference Time Domain Photonic Structure (`fdtd`)

- 20 s · tier 7 · productivity modules allowed
- Ingredients: 1 × [Superconducting magnetic unit](https://factorio.kalzumeus.com/item/sc-unit.md), 1 × [Photonic Crystal](https://factorio.kalzumeus.com/item/photonic-crystal.md), 2 × [Distributed Bragg Reflectors](https://factorio.kalzumeus.com/item/dbr.md), 4 × [Dielectric Mirror](https://factorio.kalzumeus.com/item/dieletric-mirror.md), 100 × [Helium](https://factorio.kalzumeus.com/fluid/helium.md)
- Results: 1 × [Finite Difference Time Domain Photonic Structure](https://factorio.kalzumeus.com/item/fdtd.md)
- Made in: Molecular assembler MK 01, Molecular assembler MK 02, Molecular assembler MK 03, Molecular assembler MK 04
- Unlocked by: [Photonics](https://factorio.kalzumeus.com/tech/photonics.md)

## Used in (1 recipes)

- Photonic Chip (`photonic-chip`, tier 7) → [Photonic Chip](https://factorio.kalzumeus.com/item/photonic-chip.md)