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:
Jan. 06, 2009
Filed:
Oct. 30, 2007
Applicants:
Ralf Staub, Dresden, DE;
Jürgen Amon, Dresden, DE;
Norbert Urbansky, Dresden, DE;
Inventors:
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 27/108 (2006.01); H01L 29/76 (2006.01); H01L 29/94 (2006.01); H01L 31/119 (2006.01);
U.S. Cl.
CPC ...
Abstract
A memory cell and method of forming the same is provided. To make contact between a bit line and a select transistor of a dynamic memory unit on a semiconductor wafer, a contact hole is filled with a metal or a metal alloy. A liner layer may be introduced between the semiconductor substrate and the metal filling. The semiconductor substrate has a doped region in the contact hole.