Abstract: A thermal diffusion apparatus as an object for guiding and reflecting heat, which is provided between grill and heat source and is configured so as to diffuse the heat supplied directly upwards from the heat source for uniform dispersion thereof, is disclosed. The disclosed thermal diffusion apparatus includes a heat inducing diffuser for diffusing the heat supplied directly upwards from the heat source to induce it in a 360 degree radial direction of the grill; and a support for supporting the heat inducing diffuser so as to place said heat inducing diffuser between heat source and grill.

Abstract: Disclosed herein is a method of fabricating a high temperature superconducting film in a vacuum chamber through auxiliary cluster beam spraying using an evaporation method, wherein a high temperature superconducting material is deposited on a substrate in a vapor state by evaporating the high temperature superconducting material, and at the same time, a cluster beam material is formed into gas atoms by heating the cluster beam material charged in a housing, and the formed gas atoms pass through a nozzle of an inlet of the housing and then are sprayed and grown on the substrate in the form of the cluster beam, thereby forming pinning centers in the high temperature superconducting film.

Abstract: A method for forming a poly metal gate, comprising the steps of: providing a substrate where a gate oxide is formed; forming a polysilicon film, a barrier metal, a refractory metal film and a hard mask over the gate oxide; patterning the hard mask, the refractory metal film, the barrier metal and the polysilicon film to form a gate metal gate; forming a capping layer for oxidation prevention over the gate oxide to cover the poly metal gate; etching the capping layer for oxidation prevention to remain in sidewalls of the poly metal gate; carrying out a heat treatment using a H2 gas to cover a damage of the capping layer for oxidation prevention in the capping layer etching step; and carrying out a reoxidation process to recover a damage caused in the etching step for the formation of the poly metal gate and improve reliability of the gate oxide.

Abstract: A method of forming a gate electrode in a semiconductor device which can easily perform etching process for forming the gate electrode and reduce the resistivity of a gate electrode, is disclosed. In the present invention, a gate oxide layer, an amorphous silicon layer and a tungsten silicide layer are sequentially formed on a semiconductor substrate. A mask oxide pattern is then formed on the tungsten silicide layer in the shape of a gate electrode. Next, the tungsten silicide layer and the amorphous silicon layer are etched using the mask oxide pattern as an etch mask, to form a gate electrode. Thereafter, the amorphous silicon layer and the tungsten silicide layer of the gate electrode are thermal-treated by RTP spike annealing and an oxide layer is then formed on the side wall of the gate electrode.

Abstract: A rotary shelf in a refrigerator swings together with a door of the refrigerator for being externally drawn out when the door is opened. The rotary shelf is fan-shaped to have a curved portion at one side, and one side of a linear portion is attached to the door to be exposed out of a cooling chamber while swinging in the door direction when the door is opened. A fixed shelf is formed with a guide groove joined with the curved portion for performing a mutual sliding motion in one side thereof, and other sides thereof are fixed to the interior of the cooling chamber, thereby guiding the motion of the rotary shelf.

Abstract: A refrigerator having a swing shelf swings the shelf according to the dimensions and quantity of stored items accommodated within a cooling chamber to employ the swing shelf in the stretched or erected state. The swing shelf is shaped as an alphabet "T" for swinging about a portion of crossing a horizontal plate and a vertical plate. The swinging position is classified into the stretched state and erected state, and support rods and slot parts separable from the side walls of the cooling chamber are installed for settling respective states. When the swing shelf is in the erected state, the horizontal plate is provided to the vertically-raised place to simply and conveniently accommodate the large-sized stored item regardless of the dimensions thereof.

Abstract: A refrigerator having a cool air dispersing shelf is inherently installed with a dispersing apparatus for spreading the cool air to the shelf for consistently dispersing the cool air throughout the interior of a cooling chamber within a short time period, and supplies the cool air to respective shelves simply by installing/removing the shelves. For this, a supply duct circulated with the cool air supplied into the cooling chamber therethrough has at least one discharging hole toward the cooling chamber, and an open/close member is installed in the supply duct for opening/closing the discharging hole in accordance with the installation/separation of the shelf. Also, the shelf is formed with cool air spray holes in the lower plane and a pushing portion provided by one end of a cool air suction hole for opening/closing the open/close member.

Abstract: A door for a refrigerator having rotatable pockets is provided, which includes a pair of hinge bar installation parts formed in the upper and lower portions on the inner side of a first side-wall of the door with a predetermined distance; a hinge bar installed between the pair of hinge bar installation parts and in parallel with the first side-wall along its length direction; a plurality of pocket shelves each protruded out of the inner side of the door and having one hole into which the hinge bar can be inserted; a plurality of pockets each placed between the pair of hinge bar installation parts, having a hinge bar insertion hole into which each hinge bar is inserted to move about the hinge bar, being supported by the plurality of pocket shelves, and having a fixing pit; and a plurality of protrusions formed on a second side-wall of the door to be engaged/released with/from the fixing pit when each of the plurality of pockets is closed/opened.

Abstract: A cool air circulation device of a refrigerator to forcefully circulate cool air to the fresh food compartment by circulation fan for maximizing a cooling efficiency of the refrigerator is disclosed. A driving motor having belt pully on its shaft is installed in the rear wall of the refrigerator. Controller controls the drive unit to run periodically or continuously, and to stop when opening the door of the refrigerator is provided. Circulation fan having belt pully on its shaft in which the fan rotatably installed in the installation space in the cool air circulation fan accommodation shelf is included. The lower and upper plates of shelf have a number of holes and protect the circulation fan. The rotation of the driving motor is transmitted to the circulation fan by belt.

Abstract: A cool air supplying apparatus capable of dispersedly supplying cool air into the refrigerator by use of a swing plate disposed within a cool duct is disclosed. The cool duct comprises a main duct extending through a freezing room and a refrigerating room and at least one sub-duct communicated with the main duct and having a plurality of holes for supplying the cool air. The swing plate is disposed within the sub-duct along its longitudinal direction. A shaft is disposed within the main duct to be capable of reciprocating along its longitudinal direction and is operatively connected with the swing plate. A motor is installed at an upper portion of the main duct, and a crank is operatively connected with each of a rotary shaft of the motor and the shaft.

Abstract: A cool air regulator structure of a refrigerator regulates the quantity of cool air supplied into a freezing compartment and a fresh food compartment by driving a driving part. Cool air return ducts are formed within a separating plate between the freezing compartment and fresh food compartment, and an air variable blade swinging by the driving part is provided to the rear side of the cool air return ducts. When a temperature of the freezing compartment is higher than a preset temperature and a temperature of the fresh food compartment reaches a preset temperature, temperature sensors sense the current temperature status to drive the driving part, thereby swinging the air variable blade downward. The quantity of cool air is adjusted by the swinging of the air variable blade upward in the contrary manner; otherwise, the air variable blade maintains the neutral position thereof.

Abstract: A process for preparing N, N-disubstituted urea and more particularly, to an improved process for preparing N,N'-disubstituted urea derivatives of the following formula (I) comprising ##STR1## wherein each of Ar.sup.1 and Ar.sup.2 represents unsubstituted aromatic radical or aromatic radical substituted with halogen, atom, alkyl group, or alkoxy group, and Ar.sup.1 and Ar.sup.2 are the same or different, reacting aromatic mono-nitro compound, aromatic primary amines, and carbon monoxide in the presence of the catalyst composition consisting of a palladium compound as a main catalyst and an ammonium or a phosphonium salt containing halogen atom aS a co-catalyst, and a non-polar solvent.