https://doi.org/10.1351/goldbook.T06345
A
film
whose thickness is of the order of a characteristic scale
or smaller. Since a film
may 'look' operationally thin or thick, according to the procedure applied, it is also recommended that the measurement procedure employed be specified (e.g. ellipsometrically thin film
, optically thin film
, etc.). It is recommended that the physical specification of the film
thickness be used, whenever possible (e.g. thick compared to the electron mean free path
, thin compared to the optical wavelength
, etc.)