Electronics Silicon

A semiconductor material is made into N type by

• injecting protons

• adding an acceptor impurity

• adding a donor impurity

• taking neutrons away

The process of adding small number of foreign atoms into the crystal lattice in order to enhance the properties of the material is called:

• annealing

• amplifying

• introducing

• doping

In _________ material, holes are the majority carrier and electrons are the minority carrier.

• Trivalent

• N-type

• P-type

• Pentavalent

The term semiconductor arises from

• variable conductive properties of some materials.

• resistor-like properties of metal oxides

• insulating properties of silicon and GaAs

• the fact that electrons conduct better than holes

Semiconductor crystals are formed by atoms sharing their valance electrons through _____.

• chemical reaction

• electrolysis

• covalent bonding

• chemical bonding

_______________ materials are any materials with characteristics that fall between those of insulators and conductors.

• Semiconductor

• Superconductor

• Insulator

• Conductor

Holes flow the opposite way from electrons because

• they have opposite electric charge

• Forget it! Holes flow in the same direction as electrons

• charge carriers flow continuously

• they have the same electric charge

_______________ materials have atoms with five valence electrons and are used to make N-type material.

• Trivalent

• Quadvalent

• Covalent

• Pentavalent

_______________ materials have atoms with three valence electrons and are used to make P type material.

• Pentavalent

• Quadvalent

• Covalent

• Trivalent

In _________ material, electrons are the majority carrier and holes are the minority carrier.

• Trivalent

• P-type

• N-type

• Pentavalent