A substance with electrical properties intermediate between a good conductor and a good insulator.
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Meanwhile Imagination also announced a new licensing agreement with US semiconductor business MediaTek.
Even so, the world has benefited handsomely from the decline in the cost of computing made possible by constant manufacturing improvements that have shrunk the width of semiconductor circuitry from tens of microns (millionths a metre) in the early 1970s to tens of nanometres (billionths of a metre) today.
The problem is that the material has no "band gap"—the property that makes a solid an insulator (large band gap), a conductor (tiny or no band gap) or something in between ie, a semiconductor (small band gap).
The idea later to become the basis of the Taiwanese semiconductor industry was to encourage independent chip makers to accept circuit designs from outsiders and fabricate the chips as contract manufacturers.
But recently a couple of not entirely unrelated developments have refocused attention on the differing philosophies behind processor design; and why Intel the semiconductor powerhouse that has dominated computing for decades is suddenly having to play catch-up, as mobile devices like smartphones and tablet computers start to suck the air out of the chip giant's traditional business.
One possible move would be to swap its plant for another conglomerate's semiconductor operations Samsung's strength.
And to be prepared, he has started developing systems that can be built into an exhaust without affecting the performance of the engine.The system on his test car contains a box where the hot gas is split up and fed through a series of pipes covered on the inside with lead-telluride, a thermoelectric semiconductor.
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