Patent ID: 8883552
Filing Date: 2014-11-11
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of fabricating a metal wrap through solar cell comprising: forming blind vias in a front surface of a base layer, said blind vias extending only part way through said base layer; forming an emitter on the front surface of said base layer; depositing an antireflective coating over said emitter; filling said blind vias with an electrically conductive material; depositing busbars over the front surface of said base layer, said busbars being configured to connect to said filled blind vias; attaching the front surface of said processed base layer to solar glass using an encapsulant; forming a plurality of vias from a back surface of said base layer through said base layer, said plurality of vias terminating in said filled blind vias; depositing a conformal dielectric film over the surface of said plurality of vias and the back surface of said base; removing portions of said conformal dielectric film from the ends of said plurality of vias for exposing said filled blind vias and from field areas of said base layer; and forming separate electrical contacts to said filled blind vias and said field areas, wherein said separate electrical contacts are all accessible on the back surface of said solar cell.