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. 19, 2006
Filed:
Apr. 26, 2004
Gobi R. Padmanabhan, Sunnyvale, CA (US);
Visvamohan Yegnashankaran, Redwood City, CA (US);
Gobi R. Padmanabhan, Sunnyvale, CA (US);
Visvamohan Yegnashankaran, Redwood City, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A semiconductor die is formed in a process that forms a trench opening in the semiconductor material prior to the formation of the contacts and the metal-1 layer. When contacts are then formed to contact circuit structures, such as a doped region in the top surface of the semiconductor material, a trench contact is formed that fills up the trench opening. During the final steps of the process, the back side of the semiconductor material is ground down to expose the trench contact. The wafer is cut to form a plurality of dice, and the exposed edges of the dice are protected.