Chapter 3 Flashcards
1
Q
What are semiconductors composed of?
A
Composed of single species of atoms (Si, Ge)
2
Q
Amorphous
A
No recognizable long-range order
3
Q
Polycrystalline
A
Completely order in segments
4
Q
Crystalline
A
Entire solid is made up of atoms in an orderly array
5
Q
What are semiconductors?
A
Can be varied over several orders of magnitude by in Temp., purity, optical excitation, and electrical excitation.
6
Q
Unit Cell
A
Representative volume of the entire lattice
7
Q
Lattice Constant
A
Length of a side of a cubic lattice
8
Q
SC (simple cubic) unit cell
A
- 8 corner atoms
- # of atoms/unit cell = 8 * (1/8) = 1 atoms
9
Q
BCC (body-centered cubic)
A
- 8 corner atoms
- 1 body corner atoms
- # of atoms/unit cell = 8 * (1/8) + 1 = 2 atoms
10
Q
FCC (face-centered cubic)
A
- 8 corner atoms
- 6 face corner atoms
- # of atoms/unit cell = 8 * (1/8) + 6 * (1/2) = 4 atoms
11
Q
Diamond Lattice
A
- Si, Ge
- 8 corner atoms
- 6 face corner atoms
- # of atoms/unit cell = 8 * (1/8) + 6 * (1/2) + 4 = 8 atoms
12
Q
Miller Indices
A
A notation system used in crystallography to describe the orientation of planes and directions in a crystal lattice.
