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:
Nov. 25, 2014
Filed:
May. 09, 2012
Kazuma Furutani, Kanagawa, JP;
Kazuma Furutani, Kanagawa, JP;
Semiconductor Energy Laboratories Co., Ltd., Atsugi-shi, Kanagawa, JP;
Abstract
To provide a semiconductor device whose power can be turned off without the need for a peripheral circuit for data to escape temporarily and in which stored data is not lost even in an off state of the power of the device, and a memory device including the semiconductor device. In a holding circuit of the semiconductor device, a transistor that includes a semiconductor layer (at least a channel formation region) including an oxide semiconductor material with which small off-state current can be achieved is used. Further, the semiconductor device includes a switching element which enables a comparison circuit in which comparison between data stored in the holding circuit and reference data input from the outside does not need to be performed to become forcibly inactive.