Abstract: A test socket is provided. According to an aspect of the present invention, provided is a test socket energizably connected to a semiconductor device to electrically test the semiconductor device, the test socket including a base on which a seating part on which the semiconductor device is seated is formed and a test pin protruding from the seating part in one direction, the test pin contactable with a conductive part of the semiconductor device; a cover capable of reciprocating a first position located at an end of the base in one direction and a second position located apart from the first position in the one direction; and a support member coupled to the base and supporting an outer surface of the cover.

Abstract: Disclosed herein are an apparatus and method for distributed processing of a neural network. The apparatus may include a neural network model compiler for segmenting a neural network into a predetermined number of sub-neural networks, two or more neural processing units, and a neural network operating system for abstracting the sub-neural networks into a predetermined number of tasks, performing inference using the multiple neural processing units in a distributed manner in response to a neural network inference request from at least one application, and returning an inference result to the application.

Abstract: Provided is a magnetic collet. The magnetic collet includes adsorption rubber including a plurality of individual holes passing therethrough from a contact surface, which is one surface of the adsorption rubber, coming into contact with a semiconductor chip to the other surface thereof, and a metal plate including a common hole which passes therethrough from one surface of the metal plate to the other surface thereof and provides a common passage connected to the individual holes and stacked on the adsorption rubber.

Abstract: A contact pin for a test socket is provided in the test socket for testing the electrical characteristics of a semiconductor device. The contact pin includes an elastic part elastically deformable in the longitudinal direction of the contact pin; a first contact part which includes a first support part extending from one end of the elastic part and a first contact tip connected to an end of the first support part; and a second contact part which includes a second support part extending from the other end of the elastic part and a second contact tip connected to an end of the second support part, where the elastic part and the second contact part are bent in at least one direction with respect to the first contact part.

Abstract: Disclosed is a cable adaptor comprising a first member which is conductive and comes into contact with a signal pin of the cable, a second member disposed outside the first member and coupled to the first member, a third member which is conductive and disposed outside the second member, and a contact pin fixed to the first member. Here, the first member includes a first body coupled to the second member and a first contact portion which extends from the first body and comes into contact with the signal pin. The third member includes a second body coupled to the second member and a second contact portion which extends from the second body and comes into contact with the outer conductor. A plurality of first contact points of the signal pin and the first contact portion are arranged at same intervals along a circumferential direction of the signal pin.

Abstract: Disclosed is a cable adaptor which is connected to a cable including an outer conductor. The adaptor includes a contact pin which comes into contact with a signal pin of the cable, a first member which is conductive and disposed inside and coupled to the contact pin, a second member disposed outside and coupled to the contact pin, and a third member which is conductive and disposed outside the second member. Here, the contact pin includes a first body coupled to the second member, a first contact portion which is conductive and extends from one side of the first body to come into contact with the signal pin, and a second contact portion which extends from the other side of the first body and comes into contact with an object being tested. The third member includes a second body coupled to the second member and a third contact portion.

Abstract: A method of preparing a positive electrode active material precursor for a secondary battery includes continuously adding a nickel (Ni), cobalt (Co), and manganese (Mn) transition metal cation-containing solution, an alkaline solution, and an ammonium ion-containing solution to a reactor, and forming a positive electrode active material precursor, in which nickel (Ni) and cobalt (Co) are in non-oxidized hydroxide forms and manganese (Mn) is in an oxidized form, by co-precipitation while a gas is not added or an oxygen-containing gas is continuously added to the reactor. A positive electrode active material precursor for a secondary battery is also provided which includes nickel (Ni), cobalt (Co), and manganese (Mn), wherein the nickel (Ni) and the cobalt (Co) are in non-oxidized hydroxide forms, and the manganese (Mn) is in an oxidized form.

Abstract: Provided is a magnetic collet. The magnetic collet includes adsorption rubber including a plurality of individual holes passing therethrough from a contact surface, which is one surface of the adsorption rubber, coming into contact with a semiconductor chip to the other surface thereof, and a metal plate including a common hole which passes therethrough from one surface of the metal plate to the other surface thereof and provides a common passage connected to the individual holes and stacked on the adsorption rubber.

Abstract: There is provided a probe pin for performing an electrical inspection between a contact pad of a test apparatus and a conductive ball of a semiconductor device, the probe pin including a cylinder-type bottom plunger connected to the contact pad and configured to slide vertically, a piston-type top plunger connected to the conductive ball and configured to slide vertically, and an outer spring configured to provide an elastic force between the bottom plunger and the top plunger. According to the configuration of the present invention, it is possible to perform a stable inspection process by using the outer spring despite pin miniaturization.

Abstract: A three-layer micro electro mechanical system (MEMS) spring pin includes a lower-layer spring pin in which a lower-layer wave is disposed between and connected to a lower-layer top plunger and a lower-layer bottom plunger, an upper-layer spring pin in which an upper-layer wave is disposed between and connected to an upper-layer top plunger and an upper-layer bottom plunger, a middle-layer top tip interposed between the upper-layer top plunger and the lower-layer top plunger, and a middle-layer bottom tip interposed between the upper-layer bottom plunger and the lower-layer bottom plunger. According to the above-described structure, effects are expected in which bending is prevented, a stroke is stabilized due to the multi-layer spring, and contact characteristics are enhanced due to the multi-layer plunger.

Abstract: The present invention relates to a positive electrode active material for a secondary battery, a method for preparing the same, and a secondary battery including the same, and more particularly to a positive electrode active material for a secondary battery, which includes lithium transition metal oxide particles represented by Formula 1; and lithium metal phosphate nanoparticles disposed on the surface of the lithium transition metal oxide particles and represented by Formula 2, a method for preparing the same, and a lithium secondary battery including the same Li(1+a)(Ni1?b?cMbCoc)O2??[Formula 1] In which, M is at least one metal selected from the group consisting of Mn, Al, Cu, Fe, Mg, Cr, Sr, V, Sc and Y, 0?a?0.2, 0?b?1, and 0?c?1 Li1+xM?xM?2?x(PO4)3??[Formula 2] In which, M? is Al, Y, Cr, or Ca, M? is Ge, Ti, Sn, Hf, Zn, or Zr, and 0?x?0.5.

Abstract: The present invention relates to a method for preparing a lithium iron phosphate nanopowder, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a glycerol solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 10 bar to 100 bar, and a lithium iron phosphate nanopowder prepared by the method. When compared to a common hydrothermal synthesis method and a supercritical hydrothermal synthesis method, a reaction may be performed under a relatively lower pressure. When compared to a common glycothermal synthesis method, a lithium iron phosphate nanopowder having effectively controlled particle size and particle size distribution may be easily prepared.

Abstract: A microelectromechanical system (MEMS) film for a test socket is arranged between a semiconductor device and a test apparatus for performing an electrical test of the semiconductor device and includes a flexible bare film and a plurality of round-type MEMS bumps on the bare film, each of the MEMS bumps being formed on the bare film by using a MEMS processing technique, having an electrical contact with an electrode pad of the test apparatus or a conductive ball of the semiconductor device, and having a contact surface rounded from an edge side toward a center side in a convex manner in a direction toward the electrode pad or the conductive ball.

Abstract: The present invention relates to a method for preparing a lithium iron phosphate nanopowder coated with carbon, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a glycol-based solvent, (b) putting the mixture solution into a reactor, heating and concentrating to prepare a metal glycolate slurry, (c) drying the metal glycolate slurry to form a solid content, and (d) firing the solid content to prepare the lithium iron phosphate nanopowder coated with carbon, and a lithium iron phosphate nanopowder coated with carbon prepared by the method.

Abstract: The present invention relates to a method for preparing a lithium iron phosphate nanopowder coated with carbon, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a glycerol solvent, (b) putting the mixture solution into a reactor and reacting to prepare amorphous lithium iron phosphate nanoseed particle, and (c) heat treating the lithium iron phosphate nanoseed particle thus to prepare the lithium iron phosphate nanopowder coated with carbon on a portion or a whole of a surface of a particle, and a lithium iron phosphate nanopowder coated with carbon prepared by the above method. The lithium iron phosphate nanopowder coated with carbon having controlled particle size and particle size distribution may be prepared in a short time by performing two simple steps.

Abstract: A method of manufacturing a test socket includes preparing a printed circuit board (PCB) on which a bonding pad is disposed, bonding a conductive wire on the bonding pad, mounting, on an upper surface of the PCB, a space through which the bonding pad is exposed, mounting, on an upper surface of the space, a base through which the bonding pad is exposed, mounting, on an upper surface of the base, a jig which covers the bonding pad, and injecting a liquid silicone rubber into a jig assembly by using the jig assembly as a mold, the jig assembly including the PCB, the space, the base, and the jig.

Abstract: The present invention relates to a positive electrode active material for a secondary battery, a method for preparing the same, and a secondary battery including the same, and more particularly to a positive electrode active material for a secondary battery, which includes lithium transition metal oxide particles represented by Formula 1; and lithium metal phosphate nanoparticles disposed on the surface of the lithium transition metal oxide particles and represented by Formula 2, a method for preparing the same, and a lithium secondary battery including the same. Li(1+a)(Ni1-b-cMbCoc)O2??[Formula 1] In which, M is at least one metal selected from the group consisting of Mn, Al, Cu, Fe, Mg, Cr, Sr, V, Sc and Y, 0?a?0.2, 0?b?1, and 0?c?1. Li1+xM?xM?2-x(PO4)3??[Formula 2] In which, M? is Al, Y, Cr, or Ca, M? is Ge, Ti, Sn, Hf, Zn, or Zr, and 0?x?0.5.

Abstract: The present invention relates to a method for preparing a lithium iron phosphate nanopowder, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a glycerol solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 1 bar to 10 bar, and a lithium iron phosphate nanopowder prepared by the method. When compared to a common hydrothermal synthesis method, a supercritical hydrothermal synthesis method and a glycothermal synthesis method, a reaction may be performed under a relatively lower pressure. Thus, a high temperature/high pressure reactor is not necessary and process safety and economic feasibility may be secured. In addition, a lithium iron phosphate nanopowder having uniform particle size and effectively controlled particle size distribution may be easily prepared.

Abstract: A communication connecting method between nodes through a network, includes: storing communication connection information acquired through searching for communication entities of other nodes; determining whether communication connection information on a communication entity of a connection target node exists by searching for the stored communication connection information; and configuring communication connection with the communication entity of the connection target node based on the determination result.

Abstract: The present invention relates to a method for preparing a lithium iron phosphate nanopowder, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a triethanolamine solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 10 bar to 100 bar, and a lithium iron phosphate nanopowder prepared by the method. When compared to a common hydrothermal synthesis method and a supercritical hydrothermal synthesis method, a reaction may be performed under a relatively lower pressure. When compared to a common glycothermal synthesis method, a lithium iron phosphate nanopowder having effectively controlled particle size and particle size distribution may be easily prepared.