Chip Design Enters The Third Dimension

TO ANALYZE A CHIP DESIGN with millions of transistors, today's best computer tools model the transistors only in two dimensions. Depth is ignored because the main action takes place at the surface of thin films on the silicon. But this will soon change. The width of the transistors is fast approaching the thickness of the surface films. This means the activity of electrons at the sides of a transistor will have to be modeled, too.

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