Specific Process Knowledge/Etch/III-V ICP/InP-InGaAsP-InGaAs

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InP/InGaAsP/InGaAs etch

Unselective etch for large sized features and small aspect ratios by David Larsson, DTU Photonics, 2011

Recipe InP Etch 1/InP Precond 1
Cl2 flow 20 sccm
N2 flow 40 sccm
Ar flow 10 sccm
Platen power 100 W
Coil power 500 W
Pressure 2 mTorr
Platen chiller temperature 180 oC


Results (InP Etch 1)
Etch rate 500-600 nm/min
Sidewall angle 86-87 o
Selectivity (InP:SiO2, InP:HSQ) 50:1
  • Result of InP etching. David Larsson, DTU Photonics, 2011
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