Relevant to microphones as the term has been used here before, without much explanation.
I had perused IRC's website for info to no avail.
In "The Audio Amateur", Volume 25 Number 2 or June , Ben Duncan has an article called "Piece de resistance" in which he states:
"Metal glaze is the trade name for a similar (to cermet, which means ceramic metal construction) "thick film" cocktail, originated by IRC in the US: the film comprises precious metal alloys fused to a crystalline ceramic substrate. Only this time, film thickness is around 100u, 100 times thicker than conventional metal oxide films."
The prequel to this, the cermet, is a melange of fine metal particles and glass frit applied to a substrate. The frits my be borosilicate glass, and the metals may include palladium, bismuth, rhodium, platinum, gold, and silver, and their oxides.
This is not to be confused with Metal Film resistors, which really should be called "alloy film" resistors.
IFyou ever wondered about those little cylinders in your gear that process sound.
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