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:
Sep. 17, 2002
Filed:
Jan. 20, 1999
Ulrike Gruening, Wappingers Falls, NY (US);
Jack A. Mandelman, Stormville, NY (US);
Carl J. Radens, LaGrangeville, NY (US);
Other;
Abstract
A process for forming a buried strap self-aligned to a deep storage trench. Spacers are formed on walls of a recess over a filled deep trench capacitor and a substrate. A plug is formed in a region between the spacers. Photoresist is deposited over the spacers, the plug, and material surrounding the spacers of the plug. The photoresist is patterned, thereby exposing portions of the plug, the spacers, and the surrounding material. The spacers in the surrounding material not covered by the photoresist are selectively etched, leaving a remaining portion of the spacers. The substrate and the portion of the filled deep trench exposed by the spacer removal are selectively etched. An isolation region is formed in a space created by etching of the spacers, surrounding material, substrate, and filled deep trench.