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:
Jan. 01, 2019
Filed:
Jun. 10, 2015
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
Yasuyuki Arai, Kanagawa, JP;
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
Abstract
To provide a highly integrated semiconductor memory device. To provide a semiconductor memory device which can hold stored data even when power is not supplied. To provide a semiconductor memory device which has a large number of write cycles. The degree of integration of a memory cell array is increased by forming a memory cell including two transistors and one capacitor which are arranged three-dimensionally. The electric charge accumulated in the capacitor is prevented from being leaking by forming a transistor for controlling the amount of electric charge of the capacitor in the memory cell using a wide-gap semiconductor having a wider band gap than silicon. Accordingly, a semiconductor memory device which can hold stored data even when power is not supplied can be provided.