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. 05, 2014
Filed:
Aug. 24, 2010
Ashok Sinha, Los Altos Hill, CA (US);
Wen MA, Fremont, CA (US);
Ashok Sinha, Los Altos Hill, CA (US);
Wen Ma, Fremont, CA (US);
Sunpreme, Inc., Sunnyvale, CA (US);
Abstract
Substrates for solar cells are prepared by etching a plurality of metallurgical grade wafers; depositing aluminum layer on backside of each wafer; depositing a layer of hydrogenated silicon nitride on front surface of each wafer; annealing the wafers at elevated temperature; removing the hydrogenated silicon nitride without disturbing the aluminum layer. A solar cell is then fabricated on the front surface of the wafer while the aluminum remain to serve as the back contact of the cell.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile