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. 14, 2012
Filed:
May. 31, 2005
Kiyoshi Kato, Isehara, JP;
Tetsuji Yamaguchi, Toyokawa, JP;
Etsuko Asano, Atsugi, JP;
Konami Izumi, Atsugi, JP;
Kiyoshi Kato, Isehara, JP;
Tetsuji Yamaguchi, Toyokawa, JP;
Etsuko Asano, Atsugi, JP;
Konami Izumi, Atsugi, JP;
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
Abstract
An easy-to-use and inexpensive memory device is provided while maintaining product specifications and productivity even when a memory is formed on the same substrate as other functional circuits. The memory device of the invention includes a memory cell formed on an insulating surface. The memory cell includes a semiconductor film having two impurity regions, a gate electrode, and two wirings connected to the respective impurity regions. The two wirings are insulated from each other by applying a voltage between the gate electrode and at least one of the two wirings to alter the state of the semiconductor film.