passivation


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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.

passivation

Treatment of a metal surface which leaves a protective coating, rendering the surface less reactive chemically.
References in periodicals archive ?
At first, we found that in parts produced from an older solution, the passivation layer has cracks which are not seen in parts from a fresh/new solution.
Astro Pak provides precision cleaning and passivation services in North America since 1959, with technologies and precision cleaning for the Medical Device, Semiconductor, Laser, Biopharm and other markets.
The new black passivation tank was introduced in response to a significant increase in demand for black coatings.
A continuous protective chromium oxide layer is important on any medical device or instrument because a single site that corrodes will propagate undercutting the passivation.
Customers often ask Able which metal finishing method best provides the removal of embedded materials and enhances corrosion resistance: passivation or electropolishing.
For chip resistors, however, pinholes in the passivation print layer are more common than they are for throughhole resistors.
Able bills itself as the nation's largest electropolishing specialist, offering services ranging from passivation, titanium anodizing and deburring to brite passivation, titanium finishing and ultracleaning.
The reason for passivating the rear side of the wafer is twofold: First, it acts as an optical reflector, so instead of light just passing straight through the wafer, some of it bounces back and goes through the wafer a second time, enabling twice the opportunity for interaction with an atom to generate current; second, rear side passivation reduces recombination.
Their latest breakthrough concerns the passivation layer, a coating that surrounds each nanoparticle and holds them together in a matrix.
Chemically bonded phosphate ceramics (CBPC) can create a passivation layer that stops corrosion while being mechanically protected by a tough ceramic outer layer.
Abima has more than 170 employees in Switzerland, Austria and Germany, and consists of seven niche sales companies focusing on four main areas: control and regulation of flows; industrial insulation against heat, cold and sound; cleaning and passivation technologies for stainless steel surfaces; and fire safety.
The Saunders[R] Passivation Diaphragm is designed specifically for use during passivation of stainless steel systems in life science applications.