Abstract: Disclosed is a method of forming an area-selective thin film, the method comprising supplying a nuclear growth retardant to the inside of the chamber in which the substrate is placed, so that the nuclear growth retardant is adsorbed to a non-growth region of the substrate; purging the interior of the chamber; supplying a precursor to the inside of the chamber, so that the precursor is adsorbed to a growth region of the substrate; purging the interior of the chamber; and supplying a reaction material to the inside of the chamber, so that the reaction material reacts with the adsorbed precursor to form the thin film.

Abstract: According to examples of the present disclosure, the organometallic compound is represented by Formula 1 below, which is used as a precursor when a Group 4 metal-containing thin film is deposited to provide a high-quality Group 4 metal-containing thin film. In Formula 1, M is Zr or Hf, R1 is selected from a linear alkyl group having 2 to 6 carbon atoms and a branched alkyl group having 3 to 6 carbon atoms, R2 is a linear alkyl group having 1 to 3 carbon atoms, and R1 and R2 are different from each other.

Abstract: Disclosed is a method of depositing thin film, the method comprising: supplying an adduct precursor to the inside of a chamber in which a substrate including at least one gap feature is placed so that the adduct precursor is adsorbed to the substrate; purging the interior of the chamber; and supplying a reaction material to the inside of the chamber so that the reaction material reacts with the adduct precursor to form the thin film and fill the gap feature, wherein the adduct precursor is formed by mixing 1 to 5 moles of a compound and 1 to 5 moles of a metal compound.

Abstract: Disclosed is a method for manufacturing an aluminum precursor formed by mixing 1 to 3 moles of a compound represented by the following Chemical Formula 1 or following Chemical Formula 2 and 1 to 3 moles of a compound represented by the following Chemical Formula 3. wherein X is O or S, and R1 or R2 is each independently selected from an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and an aryl group having 6 to 12 carbon atoms. wherein X is O or S, n is 1 to 5, and R1 to R4 are each independently selected from a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and an aryl group having 6 to 12 carbon atoms. wherein R1, R2 and R3 are different from each other, and each independently selected from a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a dialkylamine having 1 to 6 carbon atoms, a cycloamine group having 1 to 6 carbon atoms, or a halogen atom.

Abstract: A method for dealing with attacks of malicious BOTs in a network security system includes detecting and analyzing a domain name receiving excessive DNS queries to judge the infection of a malicious BOT, registering the corresponding domain name as normal or abnormal management target, and redirecting an abnormal DNS query for the abnormal management target to a redirection processing & response system. Thereby, the automatic detection of malicious BOT attacks and the mechanism which performs the measures and the analysis simultaneously can protect the DNS servers and prevent the security accidents by malicious BOT attacks previously.

Abstract: A paper feeding device to sense various sizes of paper according to a sensing voltage output from a sensor and an image forming apparatus having the same includes a body to receive paper in which an image is printed thereon. The image forming apparatus further includes a paper feeding device to feed paper into the body. The paper feeding device includes a paper tray in which paper is loaded, and paper guides that are slidably installed to the paper tray to guide left and right ends of paper loaded in the paper tray in a paper feeding direction. A light reflector is installed to be moved in linkage with the paper guides and includes a stepped reflection surface. A sensor emits light to the light reflector and receives the light reflected by the light reflector to determine the sizes of paper.

Abstract: A method for dealing with attacks of malicious BOTs in a network security system includes detecting and analyzing a domain name receiving excessive DNS queries to judge the infection of a malicious BOT, registering the corresponding domain name as normal or abnormal management target, and redirecting an abnormal DNS query for the abnormal management target to a redirection processing & response system. Thereby, the automatic detection of malicious BOT attacks and the mechanism which performs the measures and the analysis simultaneously can protect the DNS servers and prevent the security accidents by malicious BOT attacks previously.