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:
Jun. 04, 2013
Filed:
Jan. 06, 2010
Applicant:
John Trezza, Nashua, NH (US);
Inventor:
John Trezza, Nashua, NH (US);
Assignee:
Cufer Asset Ltd. L.L.C., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 25/065 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method performed on a wafer having multiple chips each including a doped semiconductor and substrate involves etching an annulus trench, metalizing an inner and an outer perimeter side wall of the annulus trench, etching a via trench into the wafer, making a length of the via trench electrically conductive, thinning a surface of the substrate.