Archived from groups: comp.sys.ibm.pc.hardware.chips (
More info?)
On Tue, 19 Oct 2004 17:05:35 +0000, Mike Ching wrote:
> On Mon, 18 Oct 2004 23:04:36 -0400, keith <krw@att.bizzzz> wrote:
>> On Mon, 18 Oct 2004 16:10:58 +0000, Mike Ching wrote:
>>
>>> On Mon, 18 Oct 2004 13:44:14 GMT, Robert Redelmeier <redelm@ev1.net.invalid> wrote:
>>>> Alice <AliceML_Lin@aseglobal.com> wrote:
>>>>> What is the difference in heat spreader,heat slug ,and heat
>>>>> sink in a semiconductor device?
>>>>
>>>> AFAIK, heat slug is just slang for heat spreader. Flat metal
>>>> a few cm square.
>>>
>>> The only use of the term heat slug that I've noticed is the heat pipe AMD
>>> used to transfer heat from the die to the surface of the package. It became
>>> unnecessary when Athlons were designed with the die on the surface of the
>>> package.
>>
>> I agree with your interpretation of "slug" (a heat transfer mechanism to
>> the package surface), but not with "heat-pipe". A heat-pipe is widget
>> that transfers heat from the device via a phase-change. Typically the
>> surface of the chip boils a low vapor-pressure liquid and it condenses at
>> the heat-sink end, moving heat in the process.
>
> I guess I should be more precise if I'm going to try to talk about
> terminology. I just used pipe in the sense that the transfer is mostly
> contained and was thinking of the contrast with a spreader where lateral
> transfer is the goal.
I think you just hit it dead-on.
Slug = thermal mass used to move heat to the sink
Spreader = thermal conductor to move heat *latterally* to the sink's surface
Pipe = transfer device using phase change to remofe heat
Disagreements?
--
Keith