The vertical nanowire width has to include silicon body (channel), 2x gate oxide thickness, and 2x gate thickness. So 40 nm is no surprise. Maybe this width defines a pitch, or a new feature dimension defines the node.
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.