Patent ID: 9455368
Filing Date: 2016-09-27
CPC Classification: H01L,Y02E,Y02P

Claim Text:
1. A method of forming an interdigitated back contact solar cell, comprising: forming a patterned glass layer doped with a first species on a back surface of a substrate, wherein regions of the substrate are exposed; implanting ions of a second species into the substrate, the second species having a conductivity opposite that of the first species, wherein the ions implant the exposed regions but not the regions covered by the patterned glass layer; performing a thermal process to diffuse dopant from the patterned doped glass layer into the substrate; and applying metal to the exposed regions of the substrate after the thermal process, wherein the patterned glass layer is doped with a p-type dopant, and further comprising creating a hole in the patterned glass layer and applying metal in the hole after the thermal process to contact an emitter disposed beneath the patterned glass layer.