The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2026
Filed:
Nov. 10, 2020
Applicant:
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Inventors:
Assignee:
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H10B 43/27 (2023.01);
U.S. Cl.
CPC ...
H10B 43/27 (2023.02);
Abstract
A novel semiconductor device is provided. A memory string extends in a Z direction. The memory string achieves high-speed operation by using an oxide semiconductor for a semiconductor layer. The memory string includes a MONOS memory cell. A tunnel layer is provided on a control gate side, and a block layer is provided on a semiconductor side. During erase operation, a hole is injected into a charge accumulation layer from the control gate side.