Nonvolatile semiconductor memory device

Details Nonvolatile semiconductor memory device Nonvolatile semiconductor memory device

1997-11-07

1999-05-04

Hoang, Huan

Static information storage and retrieval

Floating gate

Particular connection

365200, 365201, 36518529, 36518518, G11C 1606

Patent

active

059010800

ABSTRACT:
A nonvolatile semiconductor memory device for storing data by introducing electrons into a floating gate through a tunneling oxide film under an electric field of a control gate includes a switching circuit for supplying a reference high voltage during a normal erase mode and a test bias voltage during a test mode. In the test mode, the switching circuit can create a status where a self-field is applied between the floating gate and the source, and makes it easy to find out cells that are deteriorated due to trapping of holes into the oxide film.

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patent: 5467306 (1995-11-01), Kaya et al.
patent: 5561635 (1996-10-01), Tada et al.
patent: 5576992 (1996-11-01), Mehrad
patent: 5590075 (1996-12-01), Mazzali

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