Patent ID: 8318531
Filing Date: 2012-11-27
Classification: H01L,Y02E,Y02P

Abstract:
1. A method for fabricating a copper indium diselenide semiconductor film comprising: providing a plurality of substrates, each of the substrates having a copper and indium composite structure; transferring the plurality of substrates into a furnace, each of the plurality of substrates provided in a vertical orientation with respect to a direction of gravity, the plurality of substrates being defined by a number N, wherein N is greater than 5; introducing a gaseous species including a selenide species and a carrier gas into the furnace and transferring thermal energy into the furnace to increase a temperature from a first temperature to a second temperature, the second temperature ranging from about 350° C. to about 450° C. to at least initiate formation of a copper indium diselenide film from the copper and indium composite structure on each of the substrates; removing at least residual selenide species from the furnace; introducing a sulfide species into the furnace; and increasing a temperature to a third temperature, the third temperature ranging from about 500 to 525° C. while the plurality of substrates are maintained in an environment including a sulfur species to extract out one or more selenium species from the copper indium diselenide film; wherein the introducing of the sulfide species comprises back filling the furnace while holding the furnace at the second temperature.