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

What are ultrasonic drilling and cutting, What are ultrasonic drilling and ...

What are ultrasonic drilling and cutting? Explain in short. Ultrasonic Drilling and Cutting Ultrasonic are utilized for making holes into very hard materials as like glass a

How is laser in treatment use as cooling, How is laser in treatment use as ...

How is laser in treatment use as cooling? Lasers cooling treatment: A technique which has had recent success is laser cooling. It involves atom trapping, a process where a n

Health, Researchers found that a ________ is more important and is the key ...

Researchers found that a ________ is more important and is the key to losing weight rather than a popular one. A. Fad diet B. Counting calories diet C. Low-carb diet D. Stic

Classical free electron theory, Classical free electron theory: The ...

Classical free electron theory: The free  electron theory of metals using classical laws was developed by Dude and Lorentz in the beginning of last century. That time the va

Describe coefficient of self induction, Describe coefficient of self induct...

Describe coefficient of self induction, coefficient of mutual induction. What types of transformer is used in a bed lamp.

Does cph mass increase, Does CPH mass increase? Answer; Never, mass of ...

Does CPH mass increase? Answer; Never, mass of CPH is constant, as like its speed.

An equilateral triangle is inscribed in a circle of radius, An equilateral ...

An equilateral triangle is inscribed in a circle of radius 2 cm if P lies inside the triangle then the minimum sum of distances of P from the sides of the triangle is?   Ans

Fire, what causes glow in fire

what causes glow in fire

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