Patent ID: 8580661

Claim:
A method of hydrogenating poly-si comprising: providing poly-si and a filament; a. placing said poly-si into the interior of a chamber; b. placing said filament into the interior of said chamber; c. evacuating any gases from within the interior of said chamber; d. heating said poly-si for a predetermined poly-si heating time; e. heating a filament comprising providing an electrical power across said filament; f. supplying H 2 into said evacuated interior of said chamber comprising said heated poly-si and said heated filament, whereby said supplied H 2 reacts with said heated filament to produce atomic hydrogen; and g. said step of supplying H 2 comprises supplying H 2 to at a rate producing an atomic hydrogen surface density at the poly-si less than the poly-si surface density, thereby hydrogenating said poly-si.