Word: acidizing
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...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...
...these impurities soak into the underlying silicon. Since chips usually contain as many as ten layers, all these steps-"rusting," photomasking, etching, baking, etc.-must be repeated for each layer. Then the entire wafer is coated with an aluminum conductor, which also must be masked, etched and bathed in acid. Finally, an eagle-eyed computerized probe scans the wafer for defective circuitry and marks the bad chips in red. The wafer is then separated by a diamond cutter, the bad chips are discarded and the good ones externally wired, sealed in plastic or metal and shipped off to the user...
Sometimes the play slides into fantasy, too: the apartheid rules are so ridiculous at times they can only be treated as a bitter joke. An episode with a talking toilet that is reserved for whites only is funny, but there is an acid note somewhere not too far in the background...
...Paul A. Walters Jr., chief of psychiatry at the University Health Services, said yesterday that although no cases of treated marijuana have been brought to his attention, there is evidence of an alarming reemergence of "bad acid," especially LSD laced with speed derivatives such...
...Gone are the days when a lawn sprinkler and a fish bowl sufficed to adequately furnish a home with aquatic appliances. In recent months advertisements for a $1200 bathtub have been catching the eye of readers of national magazines. California--birthplace of car customizing, the Electric Kool-Aid Acid Test, and Jerry Brown--now offers what may prove to be the new wave of America's vassergeist: California Hot Tubbing...