Patent ID: 8815709
Filing Date: 2014-08-26
Classification: C23C,C30B

Abstract:
1. A method of depositing a compound semiconductor on a substrate comprising the steps of: (a) maintaining the substrate in a reaction chamber; (b) directing a plurality of gaseous reactants within the reaction chamber from a gas inlet in a downstream direction toward a surface of the substrate in separate streams so that the gaseous reactants mix with one another within a boundary layer at the surface of the substrate, said plurality of gaseous reactants being adapted to react with one another at said surface of said substrate so as to form a deposit on said substrate; (c) selectively supplying energy to one of said plurality of gaseous reactants downstream of said inlet and upstream of said substrate so as to impart sufficient energy to activate said one of said plurality of gaseous reactants but not sufficient to decompose said one of said plurality of gaseous reactants, the selectively supplied energy being supplied at a wavelength that is substantially absorbed by said one of said plurality of gaseous reactants and substantially not absorbed by the others of said plurality of gaseous reactants; and (d) decomposing said plurality of gaseous reactants at said surface of said substrate.