Word: chips
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...loaded with Canadian talent and N.H.L.-type rough play. Lance Nethery, who had five points against Harvard in the 6-3 loss Tuesday night, may be the best forward in the nation. Peter Shier, who coach Dick Bertrand says has "the hardest shot in college hockey," is a blue-chip prospect as a pro defensemen. Goalie Steve Napier is certainly not the best netminder in the East, but he may be the luckiest...
...other manufacturing process is quite like it. Only a single speck of dust can ruin a chip, so work must be done in "clean rooms," where the air is constantly filtered and workers are swathed in surgical-type garb...
...Some 250 chips are made from one razor-thin wafer of precisely polished silicon about 3 in. in diameter. These wafers, in turn, are sliced from cylinders of extremely pure (99.9%) crystalline silicon, grown somewhat like rock candy. Why silicon? Because it can be either electrically conducting or nonconducting, depending on the impurities added to it. Thus one small area of a chip can be "doped" (as scientists say) with impurities that give it a deficiency of electrons-making it a so-called p (or electrically positive) zone, while an adjacent area gets a surplus of electrons to create...
...silk-screening, a chip's complex circuitry is created a layer at a time. It is a slow, painstaking and error-prone procedure...
...resist, a photographic-type emulsion sensitive only to ultraviolet (UV) light. (To prevent accidental exposure, clean rooms are generally bathed in UV-less yellow light.) Next, a tiny mask, scaled down photographically from a large drawing and imprinted with hundreds of identical patterns of one layer of the chip's circuitry, is placed over the wafer. Exposed to UV, the resist's shielded areas remain soft and are readily washed away in an acid bath. On the other hand, the unshielded areas harden, forming an outline of the circuit...