PHYSICAL PROPERTIES OF MATERIALS

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Semiconductors A material whose resistivity lies between insulators and conductors •Most common semiconductor material is silicon, largely because of its abundance in nature, relative low cost, and ease of processing •What makes semiconductors unique is the capacity to significantly alter conductivities in their surface chemistries in very localized areas to fabricate integrated circuits ©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Electrical Properties in Manufacturing •Electric discharge machining - uses electrical energy in the form of sparks to remove material from metals •The important welding processes, such as arc welding and resistance spot welding, use electrical energy to melt the joint metal •Capacity to alter electrical properties of semiconductor materials is the basis for microelectronics manufacturing ©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Page 1 and 2: PHYSICAL PROPERTIES OF MATERIALS
Page 3 and 4: Physical Properties in Manufacturin
Page 5 and 6: Density Defined Weight per unit vol
Page 7 and 8: Thermal Expansion •Density of a m
Page 9 and 10: Thermal Expansion in Manufacturing
Page 11 and 12: Melting of Metal Alloys •Unlike p
Page 13 and 14: Figure 4.1 - Changes in volume per
Page 15 and 16: Thermal Properties •Thermal expan
Page 17 and 18: Volumetric Specific Heat The quanti
Page 19 and 20: Thermal Diffusivity The ratio of th
Page 21 and 22: Mass Diffusion Movement of atoms or
Page 23 and 24: Mass Diffusion in Manufacturing •
Page 25 and 26: Electrical Properties •Movement o
Page 27 and 28: Resistivity Property that defines a
Page 29: Engineering Materials and Electrica
Page 33 and 34: Terms in Electrochemical Processes
Page 35 and 36: Figure 4.3 -Example of electrolysis
Page 37 and 38: Chemical Reactions in Decomposition

PHYSICAL PROPERTIES OF MATERIALS

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