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:
May. 08, 2007
Filed:
Jan. 10, 2006
John Trezza, Nashua, NH (US);
John Trezza, Nashua, NH (US);
Cubic Wafer, Inc., Merrimack, NH (US);
Abstract
A method performed on a wafer having multiple chips, each including a doped semiconductor and substrate, involves etching an annulus trench partially into the substrate, metalizing an inner and outer perimeter side wall of the annulus trench with a metal, etching a via trench within the periphery of the annulus trench, making a length of the via trench electrically conductive, and thinning the substrate to expose the metal and the electrically conductive material so that the metal on the outer perimeter side wall and on the inner perimeter side wall are both electrically separated from each other and from the electrically conductive material.