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Incoherent · 08-26-2004, 04:46 AM

Well it's leaving the knowledge level that I'm comfortable with.

I do now believe it (low/zero spreading resistance) is the reason that a block with 12mm between die and water can perform on a par with one having less than a tenth of that much copper in the heat path. With an average convection coefficient that is probably less than half, I think a third.

I have been swinging back and forth towards your way of thinking too Cather, over the last few weeks. To the point where I almost scrapped the block, but real (if somewhat lacking in credibility) data says it's true.
I now believe it.

Remember "...reduce the thermal gradient of copper"? I do this by increasing A, with L constant, not decreasing L with A constant.

08-26-2004, 04:46 AM	#31
Incoherent Cooling Savant Join Date: Sep 2003 Location: Vallentuna, Sweden Posts: 410	Well it's leaving the knowledge level that I'm comfortable with. I do now believe it (low/zero spreading resistance) is the reason that a block with 12mm between die and water can perform on a par with one having less than a tenth of that much copper in the heat path. With an average convection coefficient that is probably less than half, I think a third. I have been swinging back and forth towards your way of thinking too Cather, over the last few weeks. To the point where I almost scrapped the block, but real (if somewhat lacking in credibility) data says it's true. I now believe it. Remember "...reduce the thermal gradient of copper"? I do this by increasing A, with L constant, not decreasing L with A constant. Last edited by Incoherent; 08-26-2004 at 04:58 AM.