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. 24, 2004
Filed:
Apr. 25, 2002
Masato Sakao, Tokyo, JP;
NEC Electronics Corporation, Kawasaki, JP;
Abstract
A semiconductor device of the present invention comprises a capacitor portion composed of a lower electrode, a capacitor insulator film, and an upper electrode sequentially stacked on an inter-layer insulator film on a semiconductor substrate; and a charging protection portion sharing the capacitor insulator film and the upper electrode. The lower electrode is electrically connected through a first contact plug provided in the inter-layer insulator film finally to a first diffused layer formed in the semiconductor substrate surface, the capacitor insulator film of the charging protection portion is adhered to a second contact plug provided in the inter-layer insulator film, the contact plug is electrically connected finally to a second diffused layer formed in the semiconductor substrate surface, and the lower electrode is made of a first conductive material and the first and second contact plugs are made of a second conductive material different from the first conductive material.