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:
Aug. 09, 1988
Filed:
Nov. 07, 1986
Koji Sakui, Tokyo, JP;
Mitsugi Ogura, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A dynamic random access memory is disclosed which has memory cell units formed on a silicon substrate, each of which includes four memory cells, each of these including a MOS transistor and a MOS capacitor. One cell unit occupies a substantially square area of the surface of the substrate. The four memory cells included in this cell unit are arranged along the diagonal lines of the square area in the shape of a cross. The four transistors are connected to a common drain through a common drain region. The capacitors are respectively arranged at the four corners of the square area so as to have a relatively increased capacitor area, thereby obtaining a large capacitance.