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:
Aug. 04, 2009
Filed:
Mar. 15, 2005
Applicant:
Norbert Staud, San Jose, CA (US);
Inventor:
Norbert Staud, San Jose, CA (US);
Assignee:
WD Media, Inc., San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L 21/302 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods to etch a workpiece are described. In one embodiment, a workpiece is disposed within an etchant solution having a composition comprising a dilute acid and a non-ionic surfactant. An electric field is generated within the etchant solution to cause an anisotropic etch pattern to form on a surface of the workpiece.