Abstract:
A beta-diketone ligand, a method for preparing the beta-diketone ligand, an organometallic complex containing the beta-diketone ligand, a method for preparing the complex, a method for forming a thin film by using the complex, and a method for forming a semiconductor memory device by using the complex are provided to improve step coverage and to form a uniform thin film on a structure having a high aspect ratio. A beta-diketone ligand comprises the first compound represented by the formula 1. The first compound represented by the formula 1 is prepared by reacting the second represented by the formula 2 and 3,3-dimethyl-2-butanone. An organometallic complex comprises the compound represented by the formula 4, wherein M is the group 2 element or a lanthanide element. A thin film is formed by supplying a first source containing the compound of the formula 4 on a substrate; supplying a second source containing an oxygen-containing gas on the substrate; and reacting the first source and the second source.
Abstract:
Provided are a novel organometallic precursor which is improved in volatility and is excellent in the reactivity with an oxidant, and a method for preparing a thin film by using the organometallic precursor. The organometallic precursor comprises a metal; and a ligand represented by the formula 1, wherein R1 and R2 are identical or different each other and are H or a C1-C5 alkyl group. Preferably the metal of the organometallic precursor is any one selected from the group consisting of strontium (Sr), barium (Ba), calcium (Ca), magnesium (Mg) and beryllium (Be). The method comprises the steps of providing a reaction material which comprises a first organometallic precursor represented by the formula 1 and a second organometallic precursor containing a metal different from that of the organometallic precursor, and an oxidant to the upper part of a substrate; and reacting the provided one to form a thin film.