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:
Dec. 27, 1988
Filed:
Oct. 31, 1986
Satoshi Maeda, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
This invention provides a semiconductor memory device for an integrated circuit comprising a semiconductor substrate of a first conductivity type, a field insulation layer on the semiconductor substrate, and a switch. This switch includes a gate insulation layer, a gate electrode on the gate insulation layer, and a pair of impurity regions of a second conductivity type in the substrate adjacent to the gate electrode. The device also includes a capacitor including a first electrode connected to one impurity region, a second electrode connected to a predetermined voltage, insulation means for separating the first and second electrodes, and groove means extending into the substrate for increasing the capacitace area of the first electrode. A method for making the devices is also described.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile