Cross-Point Array With Non-Volatile FET Devices
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-18
A cross-point array for data switching uses only one device per cross-point, a non-volatile FET, which serves the dual function of memory plus cross-point, thus avoiding the extra circuitry and/or processing normally required. The operation of the cross-point non-volatile device T1 is as follows: To make the device "always on" (low impedance between Y1 and X1), a relatively large positive voltage is applied to line X2 with respect to the voltage on line Y2. A large positive signal to line Y2 with respect to line X2 renders the device "always off". Partial voltages of opposite polarities can be applied to both lines, say, +/-5V to X2 and +/-10V to Y2 for about 1 msec. However, there are allowable technology tradeoffs to reduce this write time.