Barrier

The word barrier layer generally refers to an impermeable layer

• In electronics, a zone that appears to be neutral on the outside, see space charge zone as well as pn junction and Schottky diode
• In materials technology a layer impermeable to chemicals (see corrosion protection )
• in meteorology a layer of air, the two parts of the Earth's atmosphere separates
• In construction technology, a seal (e.g. foil) that prevents water from spreading in the masonry

This is a disambiguation page for differentiating between several terms identified with the same word.