thin films, 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:- thin films

What is the path of the magnetic field at a point, What is the path of the ...

What is the path of the magnetic field at a point due east of a straight wire carrying a current due north?

Energy, what is energy and its type?

what is energy and its type?

What is least count of stop watch , The least count of the stopwatch is 0.1...

The least count of the stopwatch is 0.1 second because in stopwatch we can measure milliseconds also...

Find the angular velocity of rotation, A mass m rotating freely in a horizo...

A mass m rotating freely in a horizontal circle of radius 1 m on a frictionless smooth table supports a stationary mass 2m, attached to the other end of the string passing through

Algebra based physics 2.., A rectangular surface (0.14 m x 0.39 m) is orien...

A rectangular surface (0.14 m x 0.39 m) is oriented in a uniform electric field of 440 N/C. What is the maximum possible electric flux through the surface?

GM tube, what is dead time of GM tube

what is dead time of GM tube?

Input capacitor of single stage amplifier circuit, Input  Capacitor  C in ...

Input  Capacitor  C in An  ac  signal  is  supplied  to  gate  of  the  FET  through  an electrolytic capacitor known as input capacitor C in . This capacitor allows only ac

Explain about intrinsic and extrinsic semiconductor, Q. Dissimilarity betwe...

Q. Dissimilarity between an intrinsic and extrinsic semiconductor? Answer:- Semiconductors permit only a little amount of light to pass through them. They are of two n-kin

Difference between the atomic theory and the kinetic theory, What is the di...

What is the difference between the Atomic Theory and the Kinetic Theory? Atomic theory is all about structure of an atom, i.e., its composition. Like an atom in general is made

Logic gates, Ask question contest light circuit diagram #Minimum 100 words ...

Ask question contest light circuit diagram #Minimum 100 words accepted#

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