Verfahren zur Durchführung von Programmoperationen in Phasenänderungsspeichern, Entsprechende Vorrichtung und Computerprogrammprodukt

Details

Veröffentlichungs-Nr.

EP4756808

Anmeldetag

24. November 2025

Veröffentlichung

10. Juni 2026

Rechtsraum

EP

IPC

G11C13/00

Abstract

A method of performing write operations in a Phase Change Memory, PCM, device, the PCM device comprising a current pulse source configured to generate a highest level of source current and to produce current pulses out of set current pulses (PS<a>; PS<b>) and reset current pulses (PR<a>; PR<b>), and a plurality of cells arranged in a plurality of groups (100<a>; 100<b>), wherein groups in the plurality of groups (100<a>; 100<b>) comprise respective sets of cells configured to be written via respective write operations. The method comprises performing the write operations via set current pulses (PS<a>; PS<b>) for each set of cells comprising at least one cell to be written via a set write operation, and via reset current pulses (PR<a>; PR<b>) for each set of cells comprising at least one cell to be written via a reset write operation. The set current pulses (PS<a>; PS<b>) provided to cells comprised in one group of the plurality of groups (100<a>; 100<b>) are time-shifted with respect to set current pulses (PS<a>; PS<b>) provided to cells comprised in the other groups, and the reset current pulses (PR<a>; PR<b>) provided to cells comprised in one group of the plurality of groups (100<a>; 100<b>) are dis-overlapped with respect to reset current pulses (PR<a>; PR<b>) provided to cells comprised in the other groups. A sum of the set current pulses (PS<a>; PS<b>) and the reset current pulses (PR<a>; PR<b>) provided to cells comprised in the plurality of groups (100<a>; 100<b>) at a common write time is equal to or lower than the highest level of source current of the current pulse source.

Anmelder

Firma

STMicroelectronics International N.V.

Land

🇨🇭 Schweiz