Noun
English Wikipedia has an article on:tunnel diodeWikipedia
tunnel diode (plural tunnel diodes)
(physics) A semiconductor diode that has negative resistance in the forward direction of its operating range due to quantum effects.
We made a completely new kind of transistor (the NPN BJT, and in our development work, our researcher, Leo Esaki, demonstrated the electron tunneling effect, which led to the development of the tunnel diode for which he was awarded a Nobel Prize seventeen years later, after he had joined IBM. Akio Morita