Reactive Ion Etching Selectivity of Si/SiO2: Comparing of two fluorocarbon gases CHF3 and CF4

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Quattrone Nanofabrication Facility
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Reactive ion etching
RIE
Si
SiO2
CHF3
CF4
Selectivity
Biomedical
Biomedical Devices and Instrumentation
Ceramic Materials
Electrical and Electronics
Electromagnetics and Photonics
Electro-Mechanical Systems
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Two reactive ion etching (RIE) processes were studied to show the relative etch selectivity between SiO2 and Si using two fluorocarbon gases, CF4 and CHF3. Results show that CHF3 gives better selectivity (16:1) over CF4 (1.2 :1). On the other hand, the etch rate of SiO2 of CF4 is approximately 52.8 nm/min, faster than CHF3 (32.4 nm/min).

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2019-03-01
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