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

Charge and discharge characteristics of nickel cadmium cell, Charge and dis...

Charge and discharge characteristics of nickel cadmium cell: During charging and discharging the electrolyte acts only as an ionised conductor, transporting electrons from one

Schrodinger Equation, For what purpose do we use Schrodinger equation in ou...

For what purpose do we use Schrodinger equation in our daily life?

Illustrate what is ntu in thermodynamics, Q. Illustrate what is ntu in ther...

Q. Illustrate what is ntu in thermodynamics? Answer:- The ntu is nothing but number of transfer units it is one of the method utilized to find the heat transfer of hot and

Electrostatic force and gravitational force, compare the electrostatic forc...

compare the electrostatic force between two protons to the gravitational force acting on them?

Magnetic effects of current, i have to make a written project on this topic...

i have to make a written project on this topic please tell me something what should i make

Which phrase would be incorrect to use, Which phrase would be incorrect to ...

Which phrase would be incorrect to use: (1)A molecular of a compound  (2)A molecule of an element (3)An atom of an element (4)None of these Ans:  (2)A molecule of a

Define elastic fatigue, It is the need of elastic strength of a substance w...

It is the need of elastic strength of a substance when subjected to repeated stresses and strain. If the substance is reserved undisturbed for some time, the previous properties ar

Define hall effect, The Phenomenon of producing a transverse emf in a curre...

The Phenomenon of producing a transverse emf in a current carrying conductor on applying a magnetic field perpendicular to the direction of the current is known as Hall effect.

Finding time period and frequency, find time period and frequency of vibrat...

find time period and frequency of vibration of water level in a limb of manometer executing simple harmonic vibrations

The effects of open circuits, The effects of open circuits: An open cir...

The effects of open circuits: An open circuit is essentially a break in the circuit. An open circuit in a series circuit will prevent the flow of current through the circuit. W

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