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

Claim 19:
20. A computer program product for determining a spatial location of a filament in a resistive random access memory (RRAM) cell, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:
bias the RRAM cell with a bias signal using a bias signal generator;
apply a laser signal at different positions of a surface of the RRAM cell using a laser signal generator;
measure, using a signal detector, a change in a signal sensed at the RRAM cell responsive to the applied laser beam signal at each different surface position;
create a map of the sense signal changes at the different surface positions;
detect a presence of a spot in the map corresponding to a sense signal change at a particular surface position;
determine an edge or center of the RRAM cell; and
determine 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.