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:
Sep. 28, 2004
Filed:
Jul. 01, 2003
Applicant:
Inventor:
Yoji Hata, Tateyama, JP;
Assignee:
UMC Japan, Chiba, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 3/10328 ; G11C 7/00 ;
U.S. Cl.
CPC ...
H01L 3/10328 ; G11C 7/00 ;
Abstract
A semiconductor memory apparatus that stores data by accumulating charges in its capacitor is provided for allowing itself to be operated at a low potential and at a high speed. In the semiconductor memory apparatus, before performing a precharge by a precharging circuit for the next cycle of read and write, a forced step-down circuit previously lowers the potential of the bit line BL charged on the high side to a level within the range of preventing data of positive charges written and stored in a memory cell MC from being disappeared.