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:
Feb. 22, 2005
Filed:
Apr. 25, 2002
Applicants:
Robert S. Oswald, Mechanicsville, VA (US);
Shengzhong Liu, Mechanicsville, VA (US);
Inventors:
Robert S. Oswald, Mechanicsville, VA (US);
Shengzhong Liu, Mechanicsville, VA (US);
Assignee:
BP Corporation North America Inc., Warrenville, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L021/00 ; H01L021/44 ; H01L021/301 ;
U.S. Cl.
CPC ...
Abstract
A photovoltaic cell comprising a supporting substrate, a front contact layer on the substrate, a layer or layers of semiconductor material and a back contact layer comprising a metal, the back contact having areas without metal thereby permitting the passage of light through the cell.