Day 3 Solid State Lecture

Question 1

Refers to any control devices which utilize semi-conductor materials to control the flow of electrons in various types of electronic circuits

Answer 1

Solid State

Question 2

A material will conduct electricity based on the number of ________ in the valence shell.

Answer 2

electrons

Question 3

3 or less electrons in valence conductor

Question 4

Material with exactly 4 electrons in the valence shell are ______ ______

Answer 4

semi-conductor

Question 6

Material with 5 or more electrons in the valence shell are _______

Answer 6

insulators (non-conductor)

Question 7

_______ and ________ are elements which have 4 electrons in valence shell

Answer 7

Silicon and Germanium

Question 8

In a pure state these elements do not conduct

Answer 8

Silicon and Germanium

Question 9

All covalent bonds are made between ______ in a _____

Answer 9

atoms in a molecule

Question 10

To get germanium and silicon to carry a current you must dope it with an atom with 5 electrons in its valence shell

Question 11

The process of adding impurities to silicon or germanium to give it specific conductive properties

Answer 11

DOPING

Question 12

Doping materials with 5 electrons

Answer 12

Arsenic

Bismuth

Antimony

Question 13

These elements have 5 electrons in the valence shell

Answer 13

Arsenic

Bismuth

Antimony

Question 14

When added to semi-conductor base extra electrons are left over when all the covalent bonds are made

Answer 14

Doping materials

Question 15

Semi conductors called “N” type materials are also called
_____ material

Answer 15

DONOR

Question 16

Doping materials with 3 electrons

Answer 16

Boron

Indium

Gallium

Question 17

These elements have only 3 electrons in the valence shell

Answer 17

Boron

Indium

Gallium

Question 18

When added to semi-conductor base spaces for electrons called _____ are left over

Answer 18

“holes”

Question 19

Semi conductors called “P” type materials are also called
_____ material

Answer 19

Also called ACCEPTOR material

Question 20

Combine N and P material together and you will get a ____

Answer 20

DIODE

Question 21

Current can flow in one direction but not the other when using an

Answer 21

An electronic check valve

Question 22

The purpose of a diode is to allow current flow in ONE direction & STOP current in the other direction

Question 23

The “P” side of a diode is called the ANODE

Question 24

The “N” side is called the CATHODE

Question 25

When a piece of P-type and N-type silicon are joined, the electrons and holes combine along the junction and form a depletion area, or a potential hill.

Question 26

Diodes with a Reverse BIAS

Answer 26

P side is connected to NEGATIVE

N side is connected to POSITIVE

Diode will not conduct

Question 26

A semiconductor is forward-biased when the positive terminal of the power source is attached to the P-type material and the negative terminal is attached to the N-type

Question 27

Diodes with a forward BIAS have

Answer 27

P side is connected to positive

N side is connected to negative

Diode conducts low resistance