A) Continuing from a pre-deposition of dopants to a substrate with a bulk concentration of 1016/cm³, a drive-in step at 1100 °C yields a final junction depth of 1.1415 µm and a surface concentration of 3 x 1017/cm³. Given that the Arrhenius activation energy is 3.56 eV and the Do is 0.32 cm²/s, determine the drive-in time (in hour). B) Determine the total number of dopants per unit area introduced in this dual- diffusion process.

A) Continuing from a pre-deposition of dopants to a substrate with a bulk concentration of 1016/cm³, a drive-in step at 1100 °C yields a final junction depth of 1.1415 µm and a surface concentration of 3 x 1017/cm³. Given that the Arrhenius activation energy is 3.56 eV and the Do is 0.32 cm²/s, determine the drive-in time (in hour). B) Determine the total number of dopants per unit area introduced in this dual- diffusion process.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

For PM Removal using Activated Carbon (AC), is the mechanism only limited to adsorption? Or does it also have other mechanisms (i.e. filtration)?
The diffusivity of iron atoms in the BCC atoms in the BCC Fe lattice is 4.2*10-23m2/sec at 400oC and 5.6*10-16m2/sec at 800oC. Calculate the activation energy in kilojoules per mole for the diffusion of iron atoms in the BCC Fe lattice in the temperature range.(upto two decimal places)
A plot of current (amperes) versus the square root of scan rate (volts/sec) for the ferricyanide/ferrocyanide (n=1) reaction give a slope value of 0.0001257. The electrode diameter is 1.5 mm. The concentration of ferricyanide is 10 mM. Calculate the diffusion coefficient in cm2/sec.
For N2 adsorbed on activated carbon at –77 °C, the following values of adsorbed gas (per gram of adsorbent) were obtained at different pressures: P/atm 3.5 10.0 16.7 25.7 33.5 39.2 v/(cm³/g) 101 136 153 162 165 166 - Estimate the volume value of the monolayer. - Calculate the coating fraction (θ) at a pressure of 10 atm. ANSWER: 0.82 - What would happen (increase / decrease) with the coating fraction at 10 atm if the temperature increased? - What would happen to the volume of the monolayer if the temperature increased? - Using the Langmuir isotherm, estimate the value of the adsorption equilibrium constant. Tip: use the overlay fraction at 10 atm (already calculated in item b) and calculate the value of K. ANSWER: 0.45
A silver-30%gold alloy sample (cylindrical with 1 cm diameter and 0.3 cm height) is subjected to a selective silver dissolution in 0.1 M HNO3 at current density of 2.5 mA/cm2 . How long will it take until the total amount of silver is dissolved? Assume in average a density of 12 g/cm3 for the alloy sample.
In this table the Kr volume adsorbed on an active carbon surface are given, as a function of the pressures, at 193.5 K. a) Does this data fit well to a Langmuir isotherm? If yes, determine vm and b.
If the number-average degree of polymerization (1/Xn) of a pure (undiluted) styrene is expressed by the equation below, the transfer constant to the monomer :(CM) and initiator (CI) will be
kindly help me with this problem Thank you! Subject: Physical Chemistry Instructions: solve as neatly as possible and show complete solution.No rounding-off for your decimals (include all decimals in your calculator in your computation). The following data were obtained for the adsorption of acetone on charcoal from an aqueous solution at 180C. Y (millimoles/g) C (millimoles/liter) 0.208 2.34 0.618 14.65 1.075 41.03 1.5 88.62 2.08 177.69 2.88 268.97 a) Find the constants k and n of the Freundlich equation. b) Find the constants a and b in the Langmuir equation. c) Find the constants k and n in the Temkin isotherm. d) Which of the isotherm fit the data best?
For the adsorption of a substance A from aqueous solution by charcoal at 25C, the Freundlich constants are n = 3.0 and k = 0.50 for y in grams per gram and C in g L-1. What weight of A will be adsorbed by 2 g of charcoal from 1 L of a solution containing originally 2 g of substance? Answer is [1 g]
Explain the following: 1. Batch Adsorption 2. Contact time 3. Equilibrium 4. Point of zero charge
Ali has measured the oxidative stability of palm oil sample under accelerated storage condition at 60*C for 6 days The following data were recorded for the peroxide value and p anisidine value of the palm oil after 5 days of storage time: Sample weight 1.0030 g Concentration of NazSzO3 = 0.001 N Volume of NazSzO3 titrated for sample solution = 1.35 ml Volume of NazSzO3 titrated for blank solution 0.20 ml Absorbance for sample solution = 0.907 Absorbance for blank solution 0.203 Calculate: i) peroxide value ii) p-anisidine value iii) TOTOX value
10 m2 with 7-micron silver coating only in certain areas on I total 50 m2 surface field copper materials were scrapped. The recovery of silver is only correct It is economical with the reactor design and under the condition of a suitable reagent selection. A- H2SO4 B- HNO3 C- HCl 1. Write down all the reactions that will occur for these acids. 2. Describe which acid (s) you prefer for the application and why. 3. As a result of the use of the reagent you intend to use in the application The time t, where you would assume a total of 20 moles of metal dissolved in real terms as a result, the maximum amount of silver and copper that can be found in solution Calculate the concentrations.