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

ADLC Assignments for Physics-30, I have 20 ADLC Physics-30 Assignments. Ple...

I have 20 ADLC Physics-30 Assignments. Please let me know how much you will charge for this.

Thermodynamic laws, Thermodynamic laws: First law of thermodynamics ...

Thermodynamic laws: First law of thermodynamics In internal energy of a system the change is the total heat transferred to or from the system & the work done on or by

What is ancient view, What is Ancient view Ancient view: objects tend...

What is Ancient view Ancient view: objects tend to stay if they are in motion; force is needed to keep something moving. This was a natural thing to believe in because we see

What do you mean by pure spectrum, What do you mean by pure spectrum? What ...

What do you mean by pure spectrum? What is an impure spectrum?

Explain gamma rays, Gamma Rays: The wave length of gamma rays is less t...

Gamma Rays: The wave length of gamma rays is less than 10-11 m.

Magnetic field , Two long wires a and b, carrying equivalent currents of 10...

Two long wires a and b, carrying equivalent currents of 10 A, are placed parallel to each other with a separation of 4 cm among them as shown in figure. Find the magnetic field B a

Relation among electric force and electric field, In an electric field   a ...

In an electric field   a charge (Q) experiences a force F = QE. If charge is positive then force is directed in the direction of field whereas if charge is negative force acts on i

Derive first law of thermodynamics, Derive First law of thermodynamics ...

Derive First law of thermodynamics When an amount of heat energy is supplied to the system, part of it enhances internal energy of the system and remaining is utilized by the s

Calculate the magnitude of the magnetic field , A 240-turn solenoid having ...

A 240-turn solenoid having a length of 21 cm and a diameter of 8.8 cm carries a current of 0.44A. Calculate the magnitude of the magnetic field inside the solenoid.

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