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:
Apr. 05, 2016
Filed:
Sep. 17, 2015
E I Du Pont DE Nemours and Company, Wilmington, DE (US);
Giuseppe Scardera, Sunnyvale, CA (US);
Shannon Dugan, Sunnyvale, CA (US);
E I DU PONT DE NEMOURS AND COMPANY, Wilmington, DE (US);
Abstract
A method for manufacturing back contact solar cells, comprising steps of: (a) providing a silicon substrate doped with phosphorus; (b) doping the front surface and the rear surface of the substrate homogeneously with boron in a blanket pattern, thereby forming a front side p+ region on the front surface and a rear side p+ region on the rear surface; (c) forming a silicon dioxide layer on the front surface and the rear surface; (d) depositing a phosphorus-containing doping paste on the silicon dioxide layer of the rear surface in a second pattern; (e) heating the silicon substrate in order to locally diffuse phosphorus into the rear surface of the silicon substrate, thereby forming a rear side n+ region on the rear surface of the silicon substrate beneath the phosphorus-containing doping paste; and (f) removing the silicon dioxide layer from the silicon substrate.