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. 30, 2003
Filed:
Jul. 02, 2001
Applicant:
Inventors:
William J. Bishop, Amherst, OH (US);
David Krus, Jr., University Heights, OH (US);
Assignee:
Brush Wellman, Inc., Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B 1/104 ;
U.S. Cl.
CPC ...
C25B 1/104 ;
Abstract
A continuously cast copper ingot is made by a procedure in which turbulence is imparted to the metal/solid interface during the casting operation. The ingot is then hot worked to form a billet having a smaller average grain size and a larger diameter than possible in the past. The billet is especially useful for making electroplating anodes used in the damascene process for making copper interconnects in silicon wafers.