# Printed circuit substrate (tier 4)

Pyanodons item · internal name `pcb4` · 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/pcb4/

## Produced by (1 recipes)

### Printed circuit substrate (tier 4) (`pcb4`)

- 4 s · tier 7 · productivity modules allowed
- Ingredients: 1 × [Mounted circuit substrate](https://factorio.kalzumeus.com/item/pcb3-2.md), 2 × [Heavy fermion material](https://factorio.kalzumeus.com/item/heavy-fermion.md), 20 × [Nylon parts](https://factorio.kalzumeus.com/item/nylon-parts.md), 3 × [Ceramic](https://factorio.kalzumeus.com/item/ceramic.md), 2 × [Zinc oxide nanoparticles](https://factorio.kalzumeus.com/item/zno-nanoparticles.md), 40 × [Etching solution](https://factorio.kalzumeus.com/fluid/etching.md), 50 × [Methanesulfonic acid (MSA)](https://factorio.kalzumeus.com/fluid/msa.md), 5 × [Lead plate](https://factorio.kalzumeus.com/item/lead-plate.md), 5 × [Bio battery](https://factorio.kalzumeus.com/item/biobattery.md)
- Results: 1 × [Printed circuit substrate (tier 4)](https://factorio.kalzumeus.com/item/pcb4.md)
- Made in: PCB factory MK 01, PCB factory MK 02, PCB factory MK 03, PCB factory MK 04
- Unlocked by: [Large scale integrated circuits](https://factorio.kalzumeus.com/tech/integrated-circuits-3.md)

## Used in (3 recipes)

- Electronics MK04 (`electronics-mk04`, tier 7) → [Electronics MK04](https://factorio.kalzumeus.com/item/electronics-mk04.md)
- Intelligent unit (`intelligent-unit`, tier 7) → [Intelligent unit](https://factorio.kalzumeus.com/item/intelligent-unit.md)
- Optical parametric oscillator (`parametric-oscilator`, tier 7) → [Optical parametric oscillator](https://factorio.kalzumeus.com/item/parametric-oscilator.md)