passivation

passivation [‚pas·ə′vā·shən]

(electronics)

Growth of an oxide layer on the surface of a semiconductor to provide electrical stability by isolating the transistor surface from electrical and chemical conditions in the environment; this reduces reverse-current leakage, increases breakdown voltage, and raises power dissipation rating.

(metallurgy)

To render passive; to reduce the reactivity of a chemically active metal surface by electrochemical polarization or by immersion in a passivating solution.

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passivation

Treatment of a metal surface which leaves a protective coating, rendering the surface less reactive chemically.