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:
Jun. 28, 2022
Filed:
Jun. 29, 2018
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Yoshinobu Asami, Isehara, JP;
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Abstract
A semiconductor device with a large storage capacity per unit area can be provided. A memory cell including a first transistor, a second transistor, a third transistor, a fourth transistor, a first capacitor, and a second capacitor includes a stack including a first conductor, a first insulator over the first conductor, a second conductor over the first insulator, a second insulator over the second conductor, and a third conductor over the second insulator; a first oxide arranged in a ring-like shape on a side surface of an opening portion of the second conductor; a fourth conductor arranged in a ring-like shape in contact with an inner wall of the first oxide; a cylindrical third insulator arranged to penetrate the stack, the first oxide, and the fourth conductor; and a second oxide arranged in contact with an inner wall of the third insulator.