Solid State Devices (Boylestad)

Question 1

Are a special class of elements having a conductivity between that of a good conductor and that of an insulator

Answer 1

Semiconductor

Question 2

Two classes of semiconductor materials

Answer 2

Single-Crystal
Compound

Question 3

Are semiconductors that have a repetitive single crystal structure

Answer 3

Single-Crystal Semiconductors

Question 4

Are semiconductors that are constructed from two or more semiconductor materials of different atomic structures

Answer 4

Compound Semiconductors

Question 5

What are the three most used semiconductors in the construction of electronic devices

Answer 5

Si, Ge, GaAs

Question 6

What do you call the electrons found at the outermost shell of an element?

Answer 6

Valence Electrons

Question 7

What do you call atoms that have three valence electrons

Answer 7

Trivalent

Question 8

What do you call atoms that have four valence electrons

Answer 8

Tetravalent

Question 9

What do you call atoms that have five valence electrons

Answer 9

Pentavalent

Question 10

It is the term used to indicate that the potential required to remove any one of these electrons from the atomic structure is significantly lower than that required for any other electron in the structure

Answer 10

Valence

Question 11

What do you call the type of bonding strengthened by the sharing of electrons

Answer 11

Covalent Bonding

Question 12

Is an electron that has separated from the fixed lattice structure and is very sensitive to any applied electric fields

Answer 12

Free Electron

Question 13

How many free carriers are there in a 1cm^3 of intrinsic silicon material at room temperature?

Answer 13

15 billion or 1.5x10^10

Question 14

Refers to any semiconductor material that has been carefully refined to reduce the number of impurities to a very low level

Answer 14

Intrinsic

Question 15

The free electrons in a material due only to external causes are referred to as ____.

Answer 15

Intrinsic Carriers

Question 16

It is the ability of the free carriers to move throughout the material

Answer 16

Relative Mobility (μn)

Question 17

What is the number of intrinsic carriers per cubic cm of Gallium Arsenide?

Answer 17

1.7x10^6

Question 18

What is the number of intrinsic carriers per cubic cm of Germanium?

Answer 18

2.5x10^13

Question 19

What is the relative mobility factor of Silicon?

Answer 19

1500

Question 20

What is the relative mobility factor of Germanium?

Answer 20

3900

Question 21

What is the relative mobility factor of Gallium Arsenide?

Answer 21

8500

Question 22

It is the ability to change the characteristics of a material

Answer 22

Doping

Question 23

What happens to the resistance of conductors when there is an increase in heat?

Answer 23

Resistance Increases

Question 24

The temperature coefficient of semiconductors are always ____

Answer 24

Negative

Question 25

Is the energy state of an electron higher when it is closer or farther from the nucleus?

Answer 25

Farther

Question 26

What do you call the energy required for electrons and holes to transition from the valence band to the conduction band?

Answer 26

Band Gap

Question 27

It is what's needed by the electron in the valence band to overcome to become a free carrier

Answer 27

Band Gap

Question 28

How many joules are there in 1 eV?

Answer 28

1.6x10^-19 J

Question 29

What is the band gap of Silicon?

Answer 29

1.12 eV

Question 30

What is the band gap of Germanium?

Answer 30

0.67 eV

Question 31

What is the band gap of Gallium Arsenide?

Answer 31

1.42 eV

Question 32

It is the term used for the base material in the construction of solid-state electronics devices

Answer 32

Substrate

Question 33

It is a semiconductor that has been subjected to the doping process

Answer 33

Extrinsic

Question 34

What are the two types of extrinsic materials?

Answer 34

n-type and p-type

Question 35

It is created by introducing impurity elements that have five valence electrons

Answer 35

n-type material

Question 36

These are diffused impurities with five valence electrons

Answer 36

Donor Atoms

Question 37

The resulting vacancy in a newly formed lattice from an insufficient number of electrons

Answer 37

Holes

Question 38

There are diffused impurities with three valence electrons

Answer 38

Acceptor Atoms

Question 39

The direction in which its indicated by the direction of hole flow is called ____

Answer 39

Conventional Flow

Question 40

What is the majority carrier in an n-type material

Answer 40

Electrons

Question 41

What is the minority carrier in an n-type material

Answer 41

Holes

Question 42

What is the majority carrier of a p-type material

Answer 42

Holes

Question 43

What is the minority carrier of a p-type material

Answer 43

Electrons

Question 44

They represent the basic building blocks of semiconductor devices

Answer 44

n-type and p-type materials