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:
Apr. 04, 1995
Filed:
Jul. 19, 1994
Hideharu Miyake, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A semiconductor memory device having stacked-capacitor type memory cells, each of which contains an MOS transistor and a storage capacitor. The capacitor has a first opposed electrode having a recess at its upper face, which is formed through an inter-layer insulation film on the substrate, a first insulation film which covers a surface of the first opposed electrode, a charge storage electrode formed in the recess of the first opposed electrode and contacted with the source region of the transistor through a contact hole of the inter-layer insulation film, a second insulation film which covers a surface of the charge storage electrode, and a second opposed electrode formed on the second insulation film. The charge storage electrodes do not broken in the fabrication sequence of the device. Even if the charge storage electrodes are sheered off in positioning to the corresponding contact holes, the inter-layer insulation film is disadvantageously etched.