Specific Process Knowledge/Etch/IBE⁄IBSD Ionfab 300/IBE blazed gratings

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This page is written by Berit Herstrøm @ DTU Nanolab (BGHE) if nothing else is stated

  • 60nm Barc
  • 360nm KRF resist

by bghe@nanolab experiments made in June/July 2012

  • Some examples of blazed gratings in fused silica etched with Cr and DUV resist as masking layer

  • 30 min etch with 100nm Cr mask, used recipe BGHE blazed gratings with CHF3
    *Rotation speed 0 rpm
    *Angle: -35
    *I(N)=400mA
    *RF power=1300W
    *I(B)=300mA
    *V(B)=300V
    *V(AC,B)=500V
    *Ar(N) flow=5sccm
    *Ar(B) flow=5sccm
    *CHF3 flow=15sccm

  • 45min etch with 100nm Cr mask, used recipe BGHE blazed gratings with CHF3
    *Rotation speed 0 rpm
    *Angle: -35
    *I(N)=400mA
    *RF power=1300W
    *I(B)=300mA
    *V(B)=300V
    *V(AC,B)=500V
    *Ar(N) flow=5sccm
    *Ar(B) flow=5sccm
    *CHF3 flow=15sccm

  • 20min etch with Krf resist, all resist is gone, used recipe BGHE blazed gratings
    *Rotation speed 0 rpm
    *Angle: -35
    *I(N)=550mA
    *RF power=1300W
    *I(B)=500mA
    *V(B)=600V
    *V(AC,B)=400V
    *Ar(N) flow=5sccm
    *Ar(B) flow=10sccm
    *CHF3 flow=0sccm

  • 15+30min etch with 50nm Cr mask, used recipe BGHE blazed gratings with CHF3
    *Rotation speed 0 rpm
    *Angle: -35
    *I(N)=400mA
    *RF power=1300W
    *I(B)=300mA
    *V(B)=300V
    *V(AC,B)=500V
    *Ar(N) flow=5sccm
    *Ar(B) flow=5sccm
    *CHF3 flow=15sccm

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