Difference between revisions of "STS Pegasus 4/Processes/LNF Ar Descum"

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| ICP Power
 
| ICP Power
 
| W
 
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| ?
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| Bias Power
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| Bias Power (LF)
 
| W
 
| W
| ?
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| 80
 
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| Bias Pulsing
 
| Bias Pulsing
| Hz
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| colspan="2" | none
| 40 Hz - 80%
 
 
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| Pressure
 
| Pressure
 
| mTorr
 
| mTorr
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| Ar Flow
 
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Revision as of 13:50, 22 November 2020

Warning Warning: This page has not been released yet.
About this Process
Process Details
Equipment STS Pegasus 4
Technology RIE
Material all
Mask Materials none
Gases Used Argon
Date Modified 7/25/2017
Authored By Kevin Owen


LNF Ar Descum uses an Ar plasma to anisotropically and indiscriminately remove a thin layer of any material on the surface of the sample. It is intended as a combination of photoresist descum and native oxide removal prior to Si etching. This recipe is already included in all of the standard recipes.

Procedure

LNF Ar Descum is included as the first process step in all standard processes, so it is not typically necessary to run as a standalone process.

The maximum etch time allowed for this process is 2 minutes.

Parameters

Parameter Units Setpoint
ICP Power W 2000
Bias Power (LF) W 80
Bias Pulsing none
Pressure mTorr 5
Ar Flow sccm 100

Capabilities

Etch rate and uniformity

Material Etch Rate Uniformity
Silicon dioxide 100 Å/min 13%
Silicon nitride ? ?
Silicon ? ?
SPR 220 190 Å/min 8%

Mask Selectivity

This recipe is intended for blanket descum of the wafer surface, so a mask is not necessary.

Limitations

Maximum allowed etch time is 2 min.