Sun Microsystems (of Santa Clara, CA, USA) was awarded a $44M contract from the U.S. Pentagon to research the replacement of physical wires between computer chips with laser beams.
It has been sort of the semiconductor industry “gold standard” to break silicon up into tiny, tiny pieces and race to see which company can reconnect them the most efficiently and squeeze the greatest performance yield by doing so.
Sun thinks they can…and that they can do it with magic…a.k.a. lasers.
This ultimately means that Sun can create chips that will NOT be hindered by the latency inherent to physical wires…we’re talking major speed here. Not only that but volume/size of chips will shrink and energy-efficiency will sky rocket (hiiii Moore’s Law!).
Supercomputer designers will be quite pleased if/when this becomes commercially available (or at least stable enough for widespread use in academia). Essentially, one of the (if not THE) biggest headaches for computer architecture designers and engineers is actually getting those little (well, little is an understatement; read: microscopic) data bits from point A to point B across tens of thousands of silicon wafers.
Here’s the general flow (and hence reasoning) in making hundreds of thousands of individual “chips” that need to talk to each other:
1. “Imprint” (for lack of a better word) 100s-1000s of identical circuits on a big ol’ silicon wafer (sounds tasty).
2. Cut up that wafer into small (read: ~0.5×0.5 in^2) chips.
3. Repeat for other circuits/chips.
The beauty: this process ensures that if there is some manufacturing error at any spot on the “big” wafer, then it will not impact a whole batch of chips.
The downside: the fact that you need to connect the chips so that they can talk to each other and pass data along. This intrinsically caps your potential processing power since the data moves at slower speeds getting from chip to chip (or doesn’t move at all if there is a faulty connection), wreaking bottlenecking to the max.
Posted in computer chips, tech
Tags: computer chips, lasers, pentagon, r&d, silicon valley, sun microsystems