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Depletion-mode DMOS FETs
(the first companies to have any commercial success with MOS products), and Intel—
the most successful of all. One of the most potentially important and successful FET
processes was developed in Japan. It was dubbed DMOS for
double-diffused MOS
and was introduced in the United States in the early 1970s. When electron-beam tech-
nology was invented in 1972, this opened the door for even more complex MOS struc-
tures, including vertical types. Since the mid-70s, continued R&D in all aspects of
silicon MOSFET technology has been taking place around the globe—in the semicon-
ductor industry, in academia, and in government ...