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:
Oct. 22, 2019
Filed:
Apr. 28, 2008
Applicant:
Marcello Riva, Hannover, DE;
Inventor:
Marcello Riva, Hannover, DE;
Assignee:
SOLVAY FLUOR GMBH, Hannover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 31/0264 (2006.01); H01L 31/18 (2006.01); H01L 27/12 (2006.01); H01L 31/0236 (2006.01);
U.S. Cl.
CPC ...
H01L 31/18 (2013.01); H01L 27/1214 (2013.01); H01L 31/02363 (2013.01); H01L 31/1804 (2013.01); Y02E 10/547 (2013.01); Y02P 70/521 (2015.11);
Abstract
Solar cells are manufactured from P-type doped monocrystalline or polycrystalline silicon ingots by sawing wafers and applying an N-type doping. The wafers can be improved by etching them, especially in a plasma assisted process, with fluorine, carbonyl fluoride, SFor NF. Hereby, the surface is roughened so that the degree of light reflection is reduced, cracks caused from the sawing operation are prevented from proliferation, and glass-like phosphorus-containing oxide coatings caused by phosphorus doping are removed.