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

Lenses, Older people wear eye glasses with bifocal corrective lenses . What...

Older people wear eye glasses with bifocal corrective lenses . What is the eye defect that necessitate this eye glasses ?

Angle between plane of polarization and plane of vibration, What is the ang...

What is the angle between plane of polarization and plane of vibration?

Gold, Gold:                          Atomic number ...

Gold:                          Atomic number 79 Symbol Au Atomic weight 196.9665 discov

Applications of newton''s laws - ii, APPLICATIONS OF NEWTON'S LAWS - II ...

APPLICATIONS OF NEWTON'S LAWS - II 1.  As the body moves through the body it displaces the fluid. It has to exert a force on the fluid to push it out of the path. By the Newto

Explain tension force (ftens), Explain Tension Force (Ftens) : Force tha...

Explain Tension Force (Ftens) : Force that is transmitted by a string, rope, cable or write when it is pulled tight by forces acting from opposite ends. The tension force is fix

Quantum phy, group velocity and phase velocity

group velocity and phase velocity

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

OPTICS, How do I make a terrestrial telescope?

How do I make a terrestrial telescope?

Coulomb, Coulomb; C (after C. de Coulomb, 1736-1806) The derived SI un...

Coulomb; C (after C. de Coulomb, 1736-1806) The derived SI unit of electric charge, described as the amount of charge transferred through a current of 1 A within a period of 1

Explain radar, Radar: The term radar is used for radio detection and ra...

Radar: The term radar is used for radio detection and ranging. Radar having of three types of devices, a transmitter, a receiver and indicator devices. It has very high frequen

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