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

Permittivity of the medium, If the charges are situated in a medium of perm...

If the charges are situated in a medium of permittivity ε, then the  magnitude of the force between them will be, If the charges are situated in a medium of permittivity ε, then th

Capacitors of capacitance , Three capacitors of capacitance 6µF each are av...

Three capacitors of capacitance 6µF each are available. Determine the minimum and maximum capacitances that could be acquired.

WORK AND ENERGY, A boy throws a ball of mass 20 kg vertically upwards.It ra...

A boy throws a ball of mass 20 kg vertically upwards.It raises to a maximum height of 100 m.At what height will the kinetic energy be reduced to 70%?

Force constants, what is the force constants of Gd2MoO6?

what is the force constants of Gd2MoO6?

Find the electric potential valid for points, Charge Q is consistently dist...

Charge Q is consistently distributed on a line segment that extends along the x-axis of a Cartesian coordinate system from the origin to x=L. Hey this is one of those circumstances

State the importance of emission and absorption spectra, State the importan...

State the importance of emission and absorption spectra. Derive the mathematical expression for refractive index of material of the prism.

State the faraday laws of electromagnetic induction, a.  State the Faraday'...

a.  State the Faraday's laws of electromagnetic induction. b.  A conducting circular loop is placed in an uniform magnetic field B=0.020 T with its plane perpendicular to the fi

Evaluate the angle between reflected and refracted ray, A monochromatic bea...

A monochromatic beam of unpolarised light is incident on a glass slab. The reflected ray is found to be purely plane polarized. Evaluate the angle between the reflected and the ref

Motion of a swing, Motion of a swing Periodic Motion :  Motion that re...

Motion of a swing Periodic Motion :  Motion that repeats itself in equal intervals of time is known as periodic motion.

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