Patent ID: 11862696
Assignee: KIOXIA CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor storage device comprising:
a stacked body in which electrode films and insulating films are alternately stacked in a first direction, wherein the electrode films includes a first electrode film and a second electrode film;
a semiconductor film extending in the first direction inside the stacked body;

a first charge storage member provided between the semiconductor film and the first electrode film in a second direction intersecting the first direction;
a second charge storage member provided between the semiconductor film and the second electrode film in the second direction and separated from the first charge storage member in the first direction; and
a tunnel insulating film that extends in the first direction inside the stacked body and is in contact with the first and the second charge storage members, wherein the electrode film includes a metal film, and a first block insulating film that is provided between the metal film and the first and second charge storage members, and the first charge storage member includes:
a first charge storage film that is in contact with the first electrode film and contains a High-k material;
a first oxide film that is in contact with the first charge storage film: and
a second charge storage film that is provided between the first oxide film and the tunnel insulating film and contains silicon nitride, wherein the second charge storage film is in contact with the tunnel insulating film, and
the second charge storage member includes:
a third charge storage film that is in contact with the second electrode film and contains a High-k material;
a second oxide film that is in contact with the third charge storage film; and
a fourth charge storage film that is provided between the second oxide film and the tunnel insulating film and contains silicon nitride, wherein the fourth charge storage film is in contact with the tunnel insulating film, and
a second block insulating film is provided between the second charge storage film and the fourth charge storage film in the first direction and is in contact with the second charge storage film and the fourth charge storage film, wherein the second block insulating film is in contact with the tunnel insulating film.