Patent ID: 11791159

Abstract:
A method of producing a crystalline silicon film includes forming a first silicon film that is amorphous at formation, forming a doped film of silicon or germanium on the first silicon film, the doped film being amorphous at formation; and annealing the structure to crystallize the doped film and the first silicon film. A method of producing a crystalline silicon film includes forming a Six1Ge1-x1 film on a substrate, forming a Six2Ge1-x2 film on the Six1Ge1-x1 film, the Six1Ge1-x1 film being amorphous at formation and having a first thermal budget for crystallization, the Six2Ge1-x2 film being amorphous at formation and having a second thermal budget for crystallization, the second thermal budget being lower than the first thermal budget, forming a silicon film on the Six2Ge1-x2 film, the silicon film being amorphous at formation; and annealing to crystallize the Six1Ge1-x1 film, the Six2Ge1-x2 film, and the silicon film.