PECVD Recipes

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PECVD 1 (PlasmaTherm 790)

SiO₂ deposition (PECVD #1)

1. Clean (30CLN_SN)
   1. Initial t=10", p=2x10-2, T=250C
   2. N₂ Purge t=30", p=300mT
   3. evacuate, base pressure=2x10-2, t=10"
   4. loop
   5. gas stabilization, t=30"
   6. etch chamber, t=30'
   7. evacuate, t=10"
   8. N₂ purge
   9. evacuate
   10. loop
   11. SiO₂ gas stabilization
   12. SiO₂ deposition( 200A coat)
   13. evacuate
   14. N₂ purge, t=30"
   15. end
2. SiO₂ deposition (SiO2_10) 440.5 A/min
   1. Initial t=10"
   2. N₂ purge t=30"
   3. evacuate, t=10"
   4. loop
   5. SiO₂ gas stabilization, t=30"
   6. SiO₂ deposition t=8'11.2"
   7. evacuate, t=10"
   8. N₂ purge t=30"
   9. evacuate t=10"
   10. loop

PECVD 2 (Advanced Vacuum)

SiN deposition (PECVD #2)

1. Standard clean
   1. Pump down: stabilization time t=15", step time(m)=0', step time(s)=30"
   2. Pre-purge: purge=1, stabilization time=15, step time(m)=1, step time(sec)=0
   3. High Pressure: process pressure=600, RF point=300, stabilization time=35, step time(m)=30, step time(s)=0, CF4/O2(5)=500
   4. Low pressure: process pressure=300, RF setpoint=300, stabilization time=15, step time(m)=30, step time(s)=0, CF4/O2(5)=500
2. Nitride 2 (HF, n=2.0, 93nm/min)
   1. process pressure=800, RF setpoint=30, stabilization time=15, step time(m)=10, step time(s)=0, 2%SiH4%He(1)=1040, N2(3)=980, NH3(2)=17

SiO₂ deposition (PECVD #2)

1. Standard clean
   1. Pump down: stabilization time t=15", step time(m)=0', step time(s)=30"
   2. Pre-purge: purge=1, stabilization time=15, step time(m)=1, step time(sec)=0
   3. High Pressure: process pressure=600, RF point=300, stabilization time=35, step time(m)=30, step time(s)=0, CF4/O2(5)=500
   4. Low pressure: process pressure=300, RF setpoint=300, stabilization time=15, step time(m)=30, step time(s)=0, CF4/O2(5)=500
2. Oxide (HF, n=1.46, 25nm/min)
   1. process pressure=800, RF setpoint=30, stabilization time=15, step time(m)=10, step time(s)=0, 2%SiH4%He(1)=600, N2O(4)=1420