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Re: The goo inside of IGBT modules.
Original poster: "Eastern Voltage Research Corporation" <dhmccauley-at-easternvoltageresearch-dot-com>
I'm not too familiar with those big bricks (we don't use things that large
where I work . . . just big TWTs and magnetrons!) but
I would imagine its a thermal conductive gel.
I have some CM600 bricks. Starting bid . . . .$200.00 EACH!!! hah ha (just
> Since there seem to be a handful of experienced power engineers
> around, i was just curious, what is the true function of the gel type
> stuff they put inside of big power semiconductors (ive seen it in
> IGBTs as well as SCRs). My thoughts were that it was to help contain
> the explosion when they fail. Also, that it may prevent moisture from
> getting on the dies and shorting it all out (since the module casing
> is not completely air tight).
> But what was more important to me was whether or not the goo serves
> any use in removing heat from the dies? Im not sure if this gel is a
> thermal insulator or a conductor really... its hard to say. Does
> anyone know for sure?
> PS. anyone have any IGBT bricks for sale? Im always looking for
> spares for my big coil! Contact me off-list.