원자층 진공 증착 장비(Atomic Layer Deposition)
타 증착 장비간 비교
| CVD | ALD | |
|---|---|---|
| Step coverage | Good(~70%) | Excellent(~95%) |
| Deposition temp | < 400℃ | < 400℃ |
| Deposition reaction | surface reaction + Gas phase reaction | surface reaction |
| Particle | · | Good |
| Contamination | 5~3 at%(C,O) | < 1at% |
| Thickness control | Depend on Gas flow rate, temp, Time, etc | Good(Depend on # of Cycle) |
| Repeatability | OK | Good |
| Compostion | Bad | Good |
ALD 기술 개요