3 ms·
Oh they are. But heat pipes/vapor chambers have them beat. So they are only used where electrical insulation (pure diamond sheet) or mechanical strength (cheap
by namibj 2y ago
Oh they are.
But heat pipes/vapor chambers have them beat.
So they are only used where electrical insulation (pure diamond sheet) or mechanical strength (cheap diamond grains sorted into a densely packed single layer of diamonds embedded into a copper matrix; this fits nicely for silver sinter bonding dies to due to the low thermal expansion of diamond) is needed from the heatsink.
- nsteel 2y agoThanks. I since found https://www.cell.com/cell-reports-physical-science/fulltext/S2666-3864(23)00517-9 https://www.cell.com/cell-reports-physical-science/fulltext/..., perhaps it makes sense where you don't have a lot of space.
- namibj 2y agoOh, nice; I was thinking of what I believe is this, though: https://sumitomoelectric.com/products/cu-diamond https://sumitomoelectric.com/products/cu-diamond : size-selected diamonds to match the thickness profile of the power module/brick base plate, then encased in copper. Benefit is arguably more the expansion matching to GaN/SiC than the thermal conductivity improvements over plain copper.