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:
Jul. 30, 2013
Filed:
Aug. 05, 2009
Applicants:
Oliver Doll, Heusenstamm, DE;
Ingo Koehler, Reinheim, DE;
Inventors:
Oliver Doll, Heusenstamm, DE;
Ingo Koehler, Reinheim, DE;
Assignee:
Merck Patent GmbH, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
H01L 21/302 (2006.01); H01L 21/461 (2006.01); C03C 25/68 (2006.01); C09K 13/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method for the wet-chemical edge deletion of solar cells. An etching paste is applied to the edge of a solar cell substrate surface and after the reaction is complete, the paste residue is removed. Optionally, the substrate surface is cleaned and dried. The etching paste comprises 85% HPO, NHHFand 65% HNOin a ratio in the range from 7:1:1.5 to 10:1:3.5, based on the weight.