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. 27, 2001
Filed:
Aug. 20, 1998
Applicant:
Inventors:
Hiroki Yamamoto, Kyoto, JP;
Yoshihiro Tada, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 1/604 ;
U.S. Cl.
CPC ...
G11C 1/604 ;
Abstract
An EEPROM device has memory cells each including of a memory transistor and a selection transistor. The memory transistor has a floating gate between a control gate and a conducting channel formed between a drain and a source. The selection transistor has its source connected to the drain of the memory transistor. During writing of data, the control gate of the memory transistor is grounded, the source of the memory transistor is kept in an open state, and a voltage corresponding to the data to be written in is applied to the gate and the drain of the selection transistor.