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

Claim 11:
12. An apparatus for determining a spatial location of a filament in a resistive random access memory (RRAM) cell, the apparatus comprising:
a signal generator for applying a bias signal to the RRAM cell;
a laser signal generator for applying a laser signal at different positions of a surface of the RRAM cell;
a detector for measuring a change in a signal sensed at the RRAM cell responsive to the applied laser signal at each different surface position;
a memory configured to store a set of instructions;
a hardware processor, in communication with the memory, the set of instructions configuring the hardware processor to:
create a mapping of the measured sense signal changes corresponding to 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.