Solid State Ch28 29

A pure semiconductor is also referred to as

• a clean room device

• intrinsic

• extrinsic

• transistor

When silicon atoms combine to form a solid, they arrange themselves into an orderly pattern called

• an orbit

• the valence shell

• a crystal

• a conductor

Other than germanium, what is another type of semiconductor material generally used?

• copper

• helium

• aluminum

• silicon

The amount of time between the creation and disappearance of a free electron is called a

• light year

• millisecond

• lifetime

• work week

In an n-type semiconductor, the free electrons are called the

• minority carriers

• majority carriers

• holes

• ions

What type of impurity is added to pure silicon to get an excess of holes?

• pentavalent

• trivalent

• covalent

• positive

The term used to describe the sharing of valence electrons that gives a crystal solidity is

• covalent bonding

• negative ion

• saturation point

• reverse bias

A trivalent atom is also called

• an acceptor atom

• a donor atom

• copper

• a negative ion

What type atoms are added to molten silicon in order to increase the number of free electrons?

• pentavalent

• trivalent

• covalent

• positive

Silicon that has been doped with a pentavalent impurity is called

• a p-type semiconductor

• an n-type semiconductor

• a conductor

• an insulator