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

Minimum amount of light for low vision, Minimum amount of light for low vis...

Minimum amount of light for low vision If 90 photons enter the eye ,10 or less are actually absorbed in photoreceptors. About 3% are reflected at the surface of the corne

Screw gauge, 1. A screw gauge consists of U- shaped metallic frame F. To on...

1. A screw gauge consists of U- shaped metallic frame F. To one end of this frame, a flat shaft is fixed. On the opposite end of a hollow long cylinder C is fixed. 2. The hollow c

Specific heat, A 3Kg bar of aluminum has to be heated from 25 degrees Cels...

A 3Kg bar of aluminum has to be heated from 25 degrees Celsius to 75 degrees Celsius. how many calories are needed to achieve this temperature increase?

Explain the planets, Explain The planets? The planets:- We know in the ...

Explain The planets? The planets:- We know in the solar system that the sun is set and that moving round it are a number of large spheres called as planets . These are nine pla

Interaction of x-rays with matter, Interaction of X-rays With Matter E...

Interaction of X-rays With Matter Elaborating the 3 principle modes through which X-rays interact along with matter. Photoelectric effect, Pair Production Compton Effect,. Sel

Example, example of like paralle forces

example of like paralle forces

Determine the absolute velocity, Figure shows an arrangement  of a carriage...

Figure shows an arrangement  of a carriage system.  A force P is applied on the carriage B and moving rightward at 3 m/s 2 constant acceleration.  At the instant shown the velocit

Direction south to north, An alpa particle is directed vertically upward wi...

An alpa particle is directed vertically upward with a speed of 3 X 104 Km/Sec in a region where a magnetic field of magnitude 1 Tesla exists in the direction south to north. Determ

Beauty criterion - dirac, Beauty criterion (Dirac) The idea that the m...

Beauty criterion (Dirac) The idea that the more aesthetically pleasant a theory is, the better it is. Of course this criterion does not stand up to the real test whether or no

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