While the idea is right (buried structure), the figure is wrong. The contact should be on the deep p+ well, so the tunneling does not take place at the surface junction but at the deep buried one. See also https://patentimages.storage.googleapis.com/80/f5/b3/551e97ef349568/US4631562.pdf Mcris31 (talk) 15:36, 27 December 2019 (UTC)
