The Materials Science of Thin Films 2011 Part 13 ppt
The Materials Science of Thin Films 2011 Part 13 ppt
... regime the temperature of the surface is largely determined by the initial distribution of the energy absorbed from the laser beam. Light penetrates within the material and the thermal ... events. Furthermore, the collective damage and zigzag motion of ions within the matrix cause them to deviate laterally from the surface entry point. When summed over the huge number of participating ... temperature. Therefore, the high-power leading edge of these lasers is used to preheat the metal and enhance the efficiency of the photon-lattice phonon energy transfer. In Table 13- 1 the common...
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The Materials Science of Thin Films 2011 Part 1 ppt
... Fig. 1-8b. The generalized behavior shown is common for all classes of solid materials, regardless of the type of bonding or crystal structure. Although the mathematical forms of the attractive ... discipline of materials science and engineer- ing. A dramatic increase in our understanding of the fundamental nature of materials throughout much of the twentieth century has led to the development ... change of T or P will destroy the three-phase equilib- Thin Films - A Historical Perspective Thin- film technology is simultaneously one of the oldest arts and one of the newest sciences....
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The Materials Science of Thin Films 2011 Part 4 ppt
... view of the MOS field effect transistor structure in Fig. 4-1 indicates the extent to which the technology is employed. Above the plane of the base P-Si wafer, all of the films with the ... (4-34b) Note the use of the perfect gas law and the neglect of the temperature dependence of D. Maintenance of stoichiometry requires that JCd = JTez 9 (4-35) the factor of 2 arising ... requires that the ratio of the vapor pressure in the crucible to that in the vacuum chamber exceed lo4 to 10'. The arrival of ionized clusters with the kinetic energy of the acceleration...
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The Materials Science of Thin Films 2011 Part 12 pptx
... substrates. The value of K, depends on a number of factors. Most important is the nature of the materials in contact, but the extent and type of lubrication, surface temperature, and nature of the ... race, the balls, and the cage as shown in Fig. 12-13a. The surface quality of the metallic components in rolling and sliding contact is of great importance. In particular, the roughness of ... wavelengths, depending on whether the refractive index of the film is greater or less than that of the substrate. In the former case the reflectivity is enhanced, whereas in the latter case reflectivity...
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The Materials Science of Thin Films 2011 Part 15 ppt
... effect on sputter yield, 113 Sputter yield, 111-112, 113 Sputter-ion pump, 70 Sputtered films, stress, 427 Sputtering, 109, 131 metals, 113 schematic, 71 alloys, 113 bias, 129 dc, 102 ... spectrometer. c. What are the energies (in eV) of these transitions? REFERENCES 1. 2.* 3. 4.* 5. 6. 7. 8. 9. 10 11. 12.* 13. * 14. D. W. Hess, in Microelectronic Materials and Processes, ... change? c. Is the tunneling probability enhanced more by decreasing V or increas- ing E by the same amount of energy. 11. predict values of A E, and AE, for the following rectangular...
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The Materials Science of Thin Films 2011 Part 2 ppsx
... in the presence of an applied field. logarithm of the rate is plotted on the ordinate and the reciprocal of the absolute temperature is plotted along the abscissa. The slope of the resulting ... continuous state of random motion, which is intimately dependent on the temperature of the gas. During their motion the gas particles collide with each other as well as with the walls of the confining ... characteristic of both the diffusing species and the matrix in which transport occurs. The extent of 50 Vacuum Science and Technology is that the large number of atoms or molecules of the gas...
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The Materials Science of Thin Films 2011 Part 5 docx
... SIC Tic BXC 513 613 613 613 613 293- 413 < 313 313 1 013- 1 213 313- 513 523 523 1 213 523- 113 413- 613 513- 113 1 213 813 523-1 213 613- 913 633- 613 413- 113 613- 813 673 10 -8-10 ... estimated in the capillarity theory. The uncertainties are now in i* and E;,. One of the important applications of this theory has been to the subject of epitaxy, where the crystallographic ... of the condensate. Shadowing is a phenomenon arising from the geometric constraint imposed by the roughness of the growing film and the line -of- sight impinge- ment of arriving atoms. The...
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The Materials Science of Thin Films 2011 Part 6 doc
... series of post-specimen lenses. The objective lens produces the first image of the object and is, therefore, required to be the most perfect of the lenses. Depending on how the beams reaching the ... discussion of the analysis of diffraction effects is well beyond the scope of this book. Some notion of the correlation between structure and diffraction patterns can be gained from the model of thin ... time one of the diffracted beams is chosen by means of an aperture that blocks the central beam and the other diffracted beams. The micrograph of alternating 40 A-wide films in the GaAs-Al,,,Ga,~,As...
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The Materials Science of Thin Films 2011 Part 8 pps
... Blakely, Thin Solid Films 25, 363, 1975). 364 Interdiffusion and Reactions in Thin Films the mathematical theories of GB diffusion including discussions of transport in these different ... array of Fig. 7-26a reflects the sixfold symmetry of the (111) plane, and the six fainter spots in between are the result of the (7 x 7) surface reconstruction. In RHEED, on the other ... in the annealed films corresponds to the compounds Au,AI and AuAI,, and the high-energy tail is indicative of Au transport through the AI film to the surface. From the fact that the...
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The Materials Science of Thin Films 2011 Part 9 pot
... Testing of Films Bulge testing is widely used to determine the mechanical properties of thin films and membranes. In this test the film-substrate assembly is sealed to the end of a hollow ... applied to the surface of a body, they act directly on the surface atoms. The forces are also indirectly transmitted to the internal atoms via the network of bonds that are distorted by the internally ... If the normal tensile stress ax = F/A, then the force resolved on these shear planes is F cos 45 = fi /2 F. The area of the shear planes is A /cos 45 = 2/ A. Therefore, the...
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