Patent ID: 6017144
Filing Date: 2000-01-25
Classification: C23C,H01L

Abstract:
A chemical vapor deposition process for depositing a substantially planar, highly reflective layer on a substrate, the process comprising:(a) placing the substrate in a process zone;(b) in an initial seeding stage, (i) heating the substrate to an initial seeding temperature T.sub.s within a first lower range of temperatures .DELTA. T.sub.s, and (ii) introducing seeding gas into the process zone to deposit a substantially continuous seeding layer on the substrate; and(c) in a subsequent oriented crystal growth stage, (i) maintaining the substrate at a deposition temperature T.sub.d within a second higher range of temperatures .DELTA. T.sub.D, wherein the initial seeding temperature T.sub.s is from about 10.degree. C. to about 30.degree. C. lower than the deposition temperature T.sub.d, and (ii) introducing deposition gas into the process zone to form an oriented crystal growth layer on the seeding layer.