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Immigration Law

: Greg Siskind's Blog

IMMIGRANT OF THE DAY: JOHN MACDOUGALL - INVENTOR

By Greg Siskind

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Today I honor Canadian-born John MacDougall as the fourth living immigrant inductee in to this year's National Inventor Hall of Fame. MacDougall invented a process of "ion bombardment" that is a critical technology used in circuitry in today's computers. According to the Hall of Fame: John Macdougall is one of the inventors of the first commercially viable method of ion implantation, a process that changes the conductivity of areas of a silicon wafer -- or ?dopes? them -- by bombarding them with ionized atoms. When the wafer is heated, each implanted atom replaces a silicon atom. This permits very precise...

Full post as published by Greg Siskind's Blog on April 14, 2009 (boomark / email).

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