Patent ID: 8962381
Filing Date: 2015-02-24
Classification: C23C,H01L,Y02E,Y02P

Abstract:
1. A method for manufacturing a solar cell from one of a p-doped or n-doped silicon substrate having a first main surface used as an incident-light side during operation and a second main surface used as a back side, the method comprising: depositing a thin layer mainly including aluminum onto the second main surface; depositing a dielectric, glass-forming paste onto the second main surface and drying the paste, in order to cover the thin layer; at least one of heating and sintering the paste on the second main surface at temperatures greater than approximately 577° C. to produce an aluminum dopant layer in the second main surface; and removing from the second main surface (i) the glass layer formed during the at least one of heating and sintering, and (ii) an aluminum-silicon eutectic layer formed during the at least one of heating and sintering, thereby exposing the aluminum dopant layer.