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silicon nitride (Si3N4) (abbr. SiN) definition

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a passivation layer chemically deposited on a wafer at temperatures of between 600 degrees C and 900 degrees C to protect the wafer from contamination. Silicon nitride is also used as a masking layer and as an insulator.

See also:

silanols definition
solvent parameter definition
Silicones definition
sol definition
solvatochromism definition