Patent ID: 9157153
Filing Date: 2015-10-13
Classification: C23C,H01L,Y02E,Y02P

Abstract:
1. A method comprising: depositing a precursor layer onto a substrate, the precursor layer comprising chalcogenide material with one or more volatile species; introducing a cover into proximity with the precursor layer; and annealing the precursor layer in proximity with of the cover, wherein the annealing is performed in a constrained volume, and wherein the presence of the cover reduces decomposition of the volatile species from the precursor layer during annealing, wherein the precursor layer comprises Cu, Zn, Sn, and one or more of S or Se, wherein the volatile species comprise Sn and one or more of S or Se, and wherein the cover is coated with a source-material layer comprising Sn and one or more of S or Se.