Sutapa Badyakar

10 Questions 8 Answers 0 Followers

Questions related from Sutapa Badyakar

Which material has bandgap of 3.8 eV?

I am trying to deposit a thin film of hydrogenated amorphous silicon by RF magnetron sputtering.

30 June 2023 1,090 3 View

How to clean a si wafer if RCA infrastucture is not available?

I have DI water, HF solution, acetone, isopropyl alcohol and ultrasonic cleaner

06 June 2023 5,353 1 View

Can glass be used as a substrate when doing a substrate biasing inside a RF sputtering chamber?

I have 3 substrates p-si (0.001-0.01 ohm cm), n-si (1-10 ohm cm) and glass. When I use si wafer as a substrate during RF sputtering I have noticed that the edges are not coated and coating is...

06 June 2023 6,925 4 View

Can biasing and non-biasing of substrates both can be done simultaneously at the same chamber in RF sputtering?

The negative bias is connected to one substrate. The other substrates are not connected to any bias but place nearby to the biased samples. Will this work in a RF sputtering chamber?

06 June 2023 7,216 0 View

How to find out hydrogen concentration from a FTIR data (reflectance %R vs wavenumber) ?

trying to find out hydrogen concentration in a thin film deposited on glass.

17 November 2021 1,908 3 View

How to calculate and analyze Urbach Energy from the UV Vis data for thin films?

If you suggest this equation then please let me know how to calculate the values of alpha and alpha0 for thin films only. alpha=alpha0*e^(hu/Eu)

17 August 2021 177 5 View

What should be the sccm value of hydrogen gas when introduced in the RF sputtering unit, in an Ar ambient, where pressure should be 2.0 * 10^-3mbar?

Argon and hydrogen pressure should be 2* 10^-3mbar. Trying for an a-Si:H coating.

30 July 2021 5,401 3 View

How to analyze a UV visible data taken in solid mode and find out bandgap by Tauc plot, where the wavelength (nm) and absorbance data is provided ?

What are the formulas to be set in the columns to get hu vs (ahu)^2? if any book name is provided, will be great.

29 July 2021 411 4 View

What should be the power density while rf magnetron sputtering of Si target and target to substrate distance ?

The configuration in target is below the substrate and the chiller water temperature doesn't go below 20 deg C. And please let me know how exactly the power density is calculated?

26 July 2021 7,934 3 View

Why Silicon is not getting deposited by rf sputtering ?

Hi All , I am using a fresh Silicon target (dia 2 inch and 6mm thickness 99.99%pure ). The base pressure of the system before gas flow is 10^-5 mbar and the Ar mass flow sccm value is set to 20....

07 December 2019 7,735 10 View