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

Explain the term magnetic declination, Explain the terms (i) magnetic decli...

Explain the terms (i) magnetic declination and (ii) angle of dip at a given place.

Define zener breakdown, Why population inversion is essential to achieve in...

Why population inversion is essential to achieve in lasing action? a) Define zener breakdown. b) What is called nanomaterials?

., What is plane diffraction grating? How the wavelength of sodium light is...

What is plane diffraction grating? How the wavelength of sodium light is measured?question #Minimum 100 words accepted#

Explain radius of gyration, Radius of gyration may be explained as the dist...

Radius of gyration may be explained as the distance from the axis at which, if the entire mass of the object were to be concentrated, the moment of inertia would be the same about

Solid block type construction of lead acid batteries, Solid block type cons...

Solid block type construction of Lead acid batteries: In the solid block type battery the electrolyte is completely absorbed into a compressed block consisting of porous plates

What is the average velocity of the airplane, The position of an airplane a...

The position of an airplane as a function of time is shown in the figure below. a. What is the average velocity of the airplane? b. What is the average speed of the air

Are heat fuses necessary, Are heat fuses necessary? The working temper...

Are heat fuses necessary? The working temperature range of the fiber optics ordinary end is critical if the performance of the system is to be kept and the life guaranteed. A

What are the different kinds of transducers available, Question 1. Disc...

Question 1. Discuss the quality control measures for ultrasound equipment? 2. What are the different kinds of transducers available? How will you select the appropriate tran

Explain the initial and the final locations of the charge, A charge of 2.00...

A charge of 2.00x 10 -6 C is moved against a constant electric field. If 4.50 x 10 -4 J of work is done on the charge. what is the potential difference between the initial an

What are intrinsic and extrinsic semiconductors, What are intrinsic and ext...

What are intrinsic and extrinsic semiconductors? A semiconductor is a material that has an electrical conductivity among that of a conductor and an insulator. In a semiconducto

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