Dielectric constant

A unit-less material property related to the amount of energy stored in a sample relative to a vacuum after a voltage is applied. Also known as the relative permittivity, ε_r.

Calculating the permittivity of a material requires multiplying its relative permittivity by the free space permittivity constant.

ε = ε_r × ε₀, where ε₀ = 8.854×10^-12 (^F/_m).

Approximate Relative Permittivity Constants of Semiconductors:

Material	εr
Ge	16
Si	12
GeAs	13
InP	14