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

How far will it travel in that time interval, If the velocity of the box in...

If the velocity of the box in problem 10 was 5.0 m/s at time zero, what will be its speed after 0.50 s? How far will it travel in that time interval?

Newton law, what is newton first law of motion

what is newton first law of motion

VIMA, Sir What''s The Meaning/Spelling of Word VIMA In English.

Sir What''s The Meaning/Spelling of Word VIMA In English.

What is neutral points , At the neutral position, magnetic field because of...

At the neutral position, magnetic field because of the bar magnet is just equal and opposite to the horizontal component of earth's magnetic field.

What is the principle of an optical fibre, Explain power of a lens. What is...

Explain power of a lens. What is the principle of an optical fibre? What is a thin prism? Describe angular dispersion between two colours for a prism.

Principal value, What is the Principal value branch of i i Ans) Princip...

What is the Principal value branch of i i Ans) Principal value branch of ii=e-π/2

define electric cell, The device which changes chemical energy into electr...

The device which changes chemical energy into electrical energy is called as electric cell. Battery is a host of constant emf but not constant current.

At what rate would you lose energy, you were to walk briefly in space witho...

you were to walk briefly in space without a spacesuit while far from the Sun (as an astronaut does in the movie  2001 ), you would feel the cold of space --while you radiated energ

Explain metallurgical industry, Metallurgical Industry:- Variable speed...

Metallurgical Industry:- Variable speed DC drives are being use usually now variable frequency AC drives using squirrel cage motors

., what is radioactivity?

what is radioactivity?

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