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in principle, yes. I don't know what the software stack is, nor what the workflow through the tooling is like. In general, I suspect it is somewhere between a 10 layer PCB and those multilayer ceramic modules the military at least used to use all the time. It isn't like I can fire up Kicad with a plugin for these things...
I doubt if it is cost-effective to do, say 12 units unless it is for a military contract. You probably don't need a volume of millions of units a year for it to make sense. Does it make sense for a thousand units? Ten thousand? For those numbers, that opens a lot of possibilities. And could spell the end of the traditional merchant chip model for servers. Especially if other companies can use Infinity Fabric for their own designs.
They said it was a 12 layer board, and the bump pitch for the interconnects is 130um (0.003" about, for pitch!) So what the line width and space width is would be very fine for pcbs. And what would via hole diameter be, and how are they made. How are the layers aligned and stacked, are they done like laminated pcb, or is the entire structure built up layer by layer by deposition and etch more like an IC?
A few years ago, 10 or 15, a few, I was experimenting with a waste oil burner and purchased a 0.010 carbide drill with a 1/8 shank to fit a die grinder collet. I was amazed that the company listed their smallest bit at 0.001. Even the 0.010 could only do a series of pecks gradually ...
I used a lathe with the die grinder mounted in the tool post and work piece chucked with the spindle locked. It would take quite some time to do one hole through 12 pcb layers otoh there could be quite a gang of bits in sync. Layers could be drilled individually. Copper wire with ball endo... My $0.02
>And what would via hole diameter be, and how are they made
And what would via hole diameter be, and how are they made. How are the layers aligned and stacked, are they done like laminated pcb, or is the entire structure built up layer by layer by deposition and etch more like an IC?
All good questions. None of which I have real answers for. Now I suspect that the vias are probably small enough that they have to be laser drilled. And for small volumes, that can be horrifyingly expensive. That isn't a NRE, though. And I suspect that if it is done more routinely, there is no reason why it can't be cheaper.
Regardless, it would be interesting to know what the costs are. And what effect volume has. If this is something that can be justified in a production run that numbers in the thousands, it can be a real game changer.