PVD, Physics

Assignment Help:
In order to deposit films of the alloy YBa2Cu3, the metals Y, Ba, and Cu are evaporated from three point
sources. The latter are situated at the corners of an equilateral triangle whose side is 20 cm. Directly above
the centroid of the source array, and parallel to it, lies a small substrate; the deposition system geometry is
effectively a tetrahedron, each side being 20 cm long.
a. If the Y source is heated to 1740 K to produce a vapor pressure of 10-3 torr, to what temperature must
the Cu source be heated to maintain film stoichiometry?
b. Rather than a point source, a surface source is used to evaporate Cu. How must the Cu source
temperature be changed to ensure deposit stoichiometry?
c. If the source configuration in part (a) is employed, what minimum O2 partial pressure is required to
deposit stoichiometric superconducting oxide YBa2Cu3O7 films by a reactive evaporation process?
The atomic weights are Y = 89, Cu = 63.5, Ba = 137, and O = 16.

Related Discussions:- PVD

What is semi conductor, Semi Conductors: Substance which are neither go...

Semi Conductors: Substance which are neither good Conductor, like metals nor very bad conductors like non metals are known as Semi conductors Examples of such substances are si

Explain process of resonance, Resonance: When the frequency of driving...

Resonance: When the frequency of driving force becomes equivalent to the natural frequency of an oscillating system, the driving force gives maximum energy and the oscillating

Calculate the total energy of a simple harmonic oscillator, Can you show ma...

Can you show mathematically that the total energy of a simple harmonic oscillator remains constant?

How much work is the wind doing on the locomotive, A train locomotive whose...

A train locomotive whose mass is 1 x 106 kilograms is travelling EAST at a speed of 100 kilometers per hour.  A NORTHERLY wind is applying a force of 100 Newtons on the locomo

Define nucleus, The nuclei have been separated on the basis of the number o...

The nuclei have been separated on the basis of the number of protons (atomic number) or the total number of nucleons (mass number) as given below: (i) Isotopes: The atoms of ele

Importance of engineering materials, Materials are an essential part of an ...

Materials are an essential part of an engineering study. An engineer requires materials to provide shape to his concept and design. Selection of the right material job in the first

Find the electric flux density, Two parallel plates having a p.d. of 250V b...

Two parallel plates having a p.d. of 250V between them are spaced 1mm apart. Determine the electric field strength. Find also the electric flux density when the dielectric a

Explain methods of demagnetization, Methods of Demagnetization: 1. A ma...

Methods of Demagnetization: 1. A magnet loss it's magnetic properly when it is heated strongly. 2. Practically a magnet can be demagnetized by hammering when it is placed in

Explain amplitude, Amplitude: The maximum displacement of a body on either...

Amplitude: The maximum displacement of a body on either side of the mean position during simple harmonic motion is known as amplitude and it is shown by x.

Nuclear Physics, what is the difference between nuclear fusion and nuclear...

what is the difference between nuclear fusion and nuclear fission?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd