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bockaudio

Platinum Blonde

Posts: 1,516 Member Since: 02/02/2011

Lead

Apr 25 15 9:28 PM

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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 1994, 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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soapfoot

Ruby Baby

Posts: 7,049 Member Since:04/02/2011

#1 [url]

Apr 25 15 9:36 PM

I've always wondered this.

I've also heard the term "carbon glaze" used before, and wasn't sure if there was such a thing, or if someone was just confused with their terminology. Have you ever heard of such?

brad allen williams

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bockaudio

Platinum Blonde

Posts: 1,516 Member Since:02/02/2011

#2 [url]

Apr 28 15 2:51 PM

Cannot find anything regarding "carbon glaze".
Carbonic Composition: finely ground carbon mixed with non-descript non-conductive filler.
Cracked Film (aka Carbon Film) or pyrolytic: thin film of carbon comp mix deposited on a ceramic rod, the deposition made with hydrocarbonns and cracked (decomposed into carbon) in situ.
Metal Oxide: Stannic chloride sprayed onto ceramic former.
Metal Film: Nickel chromium mixtured sprayed onto ceramic former.
WireWound: A length of copper-nickel alloy or nickel chromium alloy.
Conductive Plastic: Carbon diffused into a plastic film, or printed on a substratye with a carbon and plastic ink. Low power handling ability.
Bulk Metal Foil: "special" alloy foil is laser etched.
Tantalum: a tantalum film. little details available.
Diffused: found inside IC's their construction depends upon how the chip is fabricated.
MELF: Metal Electrode Facebonding and SMD device of various films.
 

Last Edited By: bockaudio Apr 28 15 3:07 PM. Edited 1 time.

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hank alrich

Platinum Blonde

Posts: 1,732 Member Since:28/01/2011

#3 [url]

Apr 28 15 5:17 PM

soapfoot wrote:
I've always wondered this.

I've also heard the term "carbon glaze" used before, and wasn't sure if there was such a thing, or if someone was just confused with their terminology. Have you ever heard of such?

That's what an old Nevada cowboy buddy of mine calls the patina on the meat when he's finished barbecueing.

hank alrich
http://hankandshaidrimusic.com/
http://www.youtube.com/walkinaymusic

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compasspnt

Diamond Forever

Posts: 21,113 Member Since:08/01/2011

#6 [url]

Apr 28 15 10:28 PM

There once was a guv
Who only her self could luv
Not kin to Keith Relf
Was oft seen as a melf.

Along came a vet
Who failed to properly vet, yet
We nearly had a v-pelf
A heartbeat away from a pelf...


I may have to delete this...

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