Abstract: To manufacture an integrated circuit (IC) device, a structure in which a first material film including silicon atoms and nitrogen atoms and a second material film devoid of nitrogen atoms is formed on a substrate. A carbonyl compound having a functional group without an ?-hydrogen is applied to the structure, and thus, an inhibitor is selectively formed only on an exposed surface of the first material film from among the first material film and the second material film.

Abstract: A method of estimating solubility includes obtaining input data representing a chemical structure of a target material; generating at least one descriptor based on the input data; obtaining at least one solubility parameter by providing the at least one descriptor to a machine learning model trained based on chemical structures and sample solubility parameters of sample materials; and calculating the solubility based on the at least one solubility parameter, wherein the at least one descriptor includes at least one of a zero-dimensional descriptor, a one-dimensional descriptor, a two-dimensional descriptor, or a three-dimensional descriptor, each representing the chemical structure of the target material.

Abstract: Disclosed are resist compositions and semiconductor device fabrication methods using the same. The resist composition comprises a hypervalent iodine compound of Chemical Formula 1 below. Wherein R1 to R7 are as defined herein.