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

Zener diode, its characteristic and working

its characteristic and working

Horizontally launched projectiles, Horizontally Launched Projectiles Su...

Horizontally Launched Projectiles Suppose a cannonball being launched from cannon atop a extremely high cliff. Imagine as well in which the cannonball does not encounter a impo

Do glass or polymer transmits the radiation, Do glass or polymer transmits ...

Do glass or polymer transmits the radiation? There is not a simple answer since it will always depend on the last use and working conditions of the system. Usually speaking gla

How the wavelength of monochromatic light is calculate, Briefly explain how...

Briefly explain how the wavelength of monochromatic light is calculated using Newton's rings arrangement?

Optical, Ask question #Minimum 4. Determine the strength of a lens needed ...

Ask question #Minimum 4. Determine the strength of a lens needed to allow a person with a far-sighted eye with a near point of Pnar= 2.0 m (near point means the closest distance f

Define laplace correction, He customized Newton's formula suppose that prop...

He customized Newton's formula suppose that propagation of sound in gaseous medium is adiabatic process. For adiabatic method

Numerical on newton''s ring experiment, Q. I n a Newton's ring experiment,...

Q. I n a Newton's ring experiment, the wavelength of the light used is 6 × 10 -5 cm and the difference of square of diameters of successive rings are 0.125 cm 3 . What will h

Explain friction of rough surfaces, Friction of rough surfaces Place tw...

Friction of rough surfaces Place two pieces of sandpaper together. Notice the friction that is formed when one is rubbed against the other. Now put some grease among the pieces

Inertial frame of reference , how to make an affective assignment on inerti...

how to make an affective assignment on inertial frame of reference and using it the explanation of relative motion? to be noted i am a university student.

Explain nuclear reaction, The method by which the identity of a nucleus is ...

The method by which the identity of a nucleus is changed when it is bombarded by an energetic particle is known as nuclear function. The general relation for the nuclear reaction i

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