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 ?
Figure 1 is the schematic of major reactions involved in lithium plating process: 1) The main reaction of lithium insertion in layered structure of carbon (assuming graphite anode); 2) the plating reaction; 3) plated lithium are oxidized by electrolyte to form passivation layers like SEI; 4) plated lithium accumulates to form dendrites.
So, we investigated developing a new solution to improve the corrosion resistance after heating through the reduction of metal ion deposits in the passivation layer.
However here a higher specification of stainless steel may be required to provide superior levels of corrosion resistance or a finer finish may be necessary to increase the integrity of the passivation layer to protect the stainless steel from attack in this potentially harsher environment such as saltwater from the sea.
The new category of anti-corrosion coating can create a long-lived passivation layer that stops corrosion.
The challenge with copper is that it leaches into the silicon, so a passivation layer or a diffusion barrier is required, and nickel has to be plated prior to copper plating.
While traditional corrosion protection has relied mostly on short-lived physically-bonded coverings of substrate surfaces, a new category of chemically bonded phosphate ceramics (CBPCs) can create a long-lived passivation layer that stops corrosion.
When the GaN HEMT gate length is reduced and the transistor is operated at a high voltage, however, electrons dramatically increase in speed, and as a result, a portion of the electrons can leak from the current pathway (electron channel layer), reaching as far as the passivation layer, where they will accumulate.
It is important to note that the protective performance of the coating passivation layer strongly depends on its chemical composition and application parameters.
One challenge for electrode-based cell monitoring is the limitation that the passivation layer, which is deposited to cover the electrode and then later removed in specific regions to create the active electrode areas (i.
A second method to remove the passivation layer is to place the BA-5590/U battery in a CLU (command launch unit), turn the CLU switch to NIGHT position and turn the switch back to the OFF position.
The MaxEdge system is part of Applied's portfolio of systems for ultra-thin crystalline silicon solar cells, including the Applied ATON PVD system for anti-reflective and passivation layer deposition and the Applied Baccini Soft Line integrated system for all-in-one screen printing, edge isolation, test and sort.
The architecture uses PPLs for global interconnections, and IC fine-line metals under the passivation layer for local interconnections.