Patent ID: 11901002
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for determining a spatial location of a filament in a resistive random access memory (RRAM) cell, the method comprising:
applying a bias signal to the RRAM cell;
applying a laser signal at different positions of a surface of the RRAM cell;
measuring a change in a sense signal at the RRAM cell responsive to the applied laser signal at each different surface position;
creating, using a hardware processor, a map of the sense signal changes corresponding to the different surface positions;
detecting, using the hardware processor, a presence of a spot in the map at a particular surface position;
determining an edge or center of the RRAM cell; and
determining a 2-dimensional coordinate position of the spot compared to the edge/center of the RRAM cell, the spot indicating the location of the filament in the RRAM device.