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Nonvolatile semiconductor memory device and driving method thereof

Assignee: Panasonic Holdings Corp
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Filing: 1998-11-30
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Granted: —
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Expires: 2018-11-30
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Abstract

Abstract Translated from Japanese (57)【要約】 【課題】 低電圧においても十分なオン状態のメモリセ ル読み出し電流を確保することができ、低電圧下での高 速読み出しを可能とする不揮発性半導体記憶装置および その駆動方法を提供する。 【解決手段】 本発明の不揮発性半導体記憶装置は、半 導体基板の上に、マトリクス状に配置された複数のメモ リセルと、行方向に延びる複数のワード線と、前記行方 向に延びる複数のソース線と、列方向に延びる複数のビ ット線とを備えた不揮発性半導体記憶装置であって、あ る行に属する複数のメモリセルが、前記複数のソース線 のうちの第1のソース線と接続され、前記ある行と隣接 する行に属する複数のメモリセルが、前記複数のソース 線のうちの第2のソース線と接続され、前記第1のソー ス線は、前記第2のソース線と電気的に独立している。 PROBLEM TO BE SOLVED: To provide a nonvolatile semiconductor memory device capable of securing a sufficient ON-state memory cell read current even at a low voltage and enabling high-speed read at a low voltage, and a driving method thereof. provide. A nonvolatile semiconductor memory device according to the present invention includes a plurality of memory cells arranged in a matrix on a semiconductor substrate, a plurality of word lines extending in a row direction, and a plurality of sources extending in the row direction. A non-volatile semiconductor memory device including a plurality of bit lines extending in a column direction, wherein a plurality of memory cells belonging to a certain row are connected to a first source line of the plurality of source lines. A plurality of memory cells belonging to a row adjacent to the certain row are connected to a second source line of the plurality of source lines, and the first source line is electrically connected to the second source line. Independent.

Inventors

  • 👤 Keita Takahashi
  • 👤 桂太 高橋

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-10-30 08:30
CPC Classifications
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