Sputter | LPCVD | MOCVD | ALD | |
---|---|---|---|---|
Step coverage |
Bad | Excellent (~90%) |
Good (~70%) |
Excellent (~95%) |
Deposition temp. |
Room temp | > 600 ℃ | > 300 ℃ | < 300 ℃ |
Deposition reaction |
Physical deposition |
Surface reaction
+ Gas phase |
Surface reaction
+ Gas phase |
Surface reaction |
Particle | Good | • | • | Good |
Contamination | < 1at% | 2 ~5 at% (C) | 5 ~ 30 at% (C,O) | < 1at% |
Thickness control |
Bad | Good | Good | Excellent |
Repeatability | Good | OK | OK | Good |
Composition | Good | Bad | Bad | Good |
Growth Rate | Good | Good | Good | Bad |