Patent ID: 8778787
Filing Date: 2014-07-15
Classification: H01L,Y02E

Abstract:
1. A method of forming contacts for a solar cell, the method comprising: forming a silicon layer above a substrate; forming and patterning a solid-state p-type dopant source on the silicon layer, the patterning exposing regions of the silicon layer between a plurality of regions of the solid-state p-type dopant source; forming an n-type dopant source layer over the exposed regions of the silicon layer and the plurality of regions of the solid-state p-type dopant source, the forming comprising at least partially driving dopants from the n-type dopant source layer into the exposed regions of the silicon layer to form a plurality of n-type dopant-containing silicon regions between the plurality of regions of the solid-state p-type dopant source; and, subsequently, heating the substrate to provide a plurality of n-type doped silicon regions among a plurality of p-type doped silicon regions; and, prior to the heating, removing the plurality of regions of the solid-state p-type dopant source.