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. 04, 2007
Filed:
Jan. 18, 2005
Thomas Nirschl, Göttersdorf, DE;
Alexander Olbrich, Höhenkirchenerstr, DE;
Martin Ostermayr, Feldkirchen, DE;
Thomas Nirschl, Göttersdorf, DE;
Alexander Olbrich, Höhenkirchenerstr, DE;
Martin Ostermayr, Feldkirchen, DE;
Infineon Technologies AG, Munich, DE;
Abstract
A semiconductor memory cell and an associated fabrication method are provided in which a storage capacitor is connected to a selection transistor. The storage capacitor is formed in a trench of a semiconductor substrate. At the trench surface, a capacitor dielectric and an electrically conductive filling layer are formed thereon for realization of a capacitor counterelectrode. The filling layer has a projection that extends outside the trench as far as the drain region and is electrically connected thereto.