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| ==Comparison of Chromium Etch Methods== | | ==Comparison of Chromium Etch Methods== |
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| {|border="1" cellspacing="1" cellpadding="3" style="text-align:left;"
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| |-style="background:silver; color:black"
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| !
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| ![[Specific Process Knowledge/Etch/Wet Chromium Etch|Cr wet etch]]
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| ![[Specific_Process_Knowledge/Etch/ICP_Metal_Etcher|ICP metal]]
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| ![[Specific_Process_Knowledge/Etch/IBE⁄IBSD Ionfab 300|IBE (Ionfab300+)]]
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| |-style="background:WhiteSmoke; color:black"
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| !Generel description
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| |Wet etch of Cr premixed (Chrome etch 18)
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| |Dry plasma etch of Cr
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| |Sputtering of Cr - pure physical etch
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| |-style="background:LightGrey; color:black"
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| !Etch rate range
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| *~150nm/min at room temperature
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| *~14 nm/min (depending on features size and etch load)
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| *~30nm/min (not tested yet)
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| |-style="background:WhiteSmoke; color:black"
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| !Etch profile
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| *Isotropic
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| *Anisotropic (vertical sidewalls)
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| *Anisotropic (angles sidewalls, typical around 70 dg)
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| |-style="background:LightGrey; color:black"
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| !Substrate size
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| *Any size and number that can go inside the beaker in use
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| * 150 mm wafers
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| * Smaller wafers or pieces on a 150 mm carrier wafer
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| Smaller pieces glued to carrier wafer
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| *<nowiki>#</nowiki>1 50mm wafer
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| *<nowiki>#</nowiki>1 100mm wafer
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| *<nowiki>#</nowiki>1 150mm wafer
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| *<nowiki>#</nowiki>1 200mm wafer
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| |-style="background:WhiteSmoke; color:black"
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| !Allowed materials
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| No restrictions cross contamination wise as long as you use the right beaker and make sure that they are safe to enter in the chemicals
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| *Silicon
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| *Quartz/fused silica
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| *Photoresist/e-beam resist
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| *PolySilicon,
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| *Silicon oxide
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| *Silicon (oxy)nitride
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| *Aluminium
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| *Titanium
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| *Chromium
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| *Silicon
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| *Silicon oxides
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| *Silicon nitrides
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| *Metals from the +list
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| *Metals from the -list
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| *Alloys from the above list
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| *Stainless steel
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| *Glass
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| *III-V materials
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| *Resists
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| *Polymers
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| *Capton tape
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| |}
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| ===Comparison of Chromium Etch Methods===
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| {|border="1" cellspacing="1" cellpadding="3" style="text-align:left;" | | {|border="1" cellspacing="1" cellpadding="3" style="text-align:left;" |
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| |Dry plasma etch of Cr | | |Dry plasma etch of Cr |
| |Sputtering of Cr - pure physical etch | | |Sputtering of Cr - pure physical etch |
| |Primarily shallow etching of silicon but also thin layers of SiO2, TaO2 and Cr | | |Primarily shallow dry etching of silicon but also thin layers of SiO2, TaO2 and Cr |
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