Patent ID: 6252273
Filing Date: 2001-06-26
Classification: G11C,H01L

Abstract:
A programmable interconnect cell for selectively connecting circuit nodes of an integrated circuit in a semiconductor substrate comprising:a switch field effect transistor having first and second source/drains respectively connectable to first and second circuit nodes, a floating gate for storing charge, and a control gate for turning the switch transistor on and off at a threshold responsive to charge on the floating gate,a sense field effect transistor having first and second source/drains, a floating gate for storing charge, and a control gate for turning the sense transistor on and off responsive to charge on the floating gate, andan electron tunneling device having a floating gate for the tunneling of electrons to and from a voltage biased conductive line, and a control gate overlying the floating gate for controlling the tunneling of electrons to and from the floating gate,means interconnecting the floating gates of the switch transistor, the sense transistor, and the electron tunneling device, and means interconnecting the control gates of the switch transistor, the sense transistor, and the electron tunneling device, whereby programming and erasing the switch transistor is effected by the tunneling of electrons to and from the floating gate in the electron tunneling device.