Senic Inc.

Skc Co., Ltd.

Jung-Gyu Kim

Jung Woo Choi

Kap-Ryeol Ku

Jong Hwi Park

Byung Kyu Jang

Sang Ki Ko

Eun Su Yang

Jongmin Shim

Myung-Ok Kyun

Jung Doo Seo

Jonggab Baek

Yeon Sik Lee

Jun Rok Oh

Ki Ryun Park

Hoon Tae Kim

Myung Ok Kyun

Il Hwan Yoo

The method of preparing a silicon carbide ingot includes: disposing a raw material and a silicon carbide seed crystal to be separated in a reactor having an internal space; adjusting a temperature, a pressure, and an atmosphere of the internal space for sublimating the raw material and growing the silicon carbide ingot on the silicon carbide seed crystal; and cooling the reactor and retrieving the silicon carbide ingot, wherein the adjusting proceeds in a first inert gas atmosphere having a flow quantity of 100 sccm to 300 sccm, the cooling proceeds in a second inert gas atmosphere having a flow quantity of 1 sccm to 250 sccm, and the reactor has a thermal conductivity of 120 W/mK or less.

Silicon carbide wafer and method of preparing the same

A silicon carbide wafer has one surface and the other surface opposite to the one surface. An average Rmax roughness of the one surface is 2.0 nm or less, and an average Ra roughness of the one surface is 0.1 nm or less. An edge region is a region in which a distance from an edge of the silicon carbide wafer toward a center is 5% to 75% of a radius of the silicon carbide wafer, and a central region is a region having a radius of 25% of the radius of the silicon carbide wafer at the center of the silicon carbide wafer. A difference between an average Rmax roughness of the edge region of the one surface and an average Rmax roughness of the central region of the one surface is 0.01 nm to 0.5 nm.

Silicon carbide wafer and semiconductor device

In a silicon carbide wafer in an embodiment, in the photoluminescence signal intensity spectrum obtained after irradiating a laser on one surface of the silicon carbide wafer, the number of peak signals having an intensity more than 1.2 times the average signal intensity of the spectrum is 1/cmor less.

Silicon carbide wafer and semiconductor device applied the same

A silicon carbide wafer manufacturing method includes: a bending measuring step of measuring a first edge having the greatest degree of a bending at one surface of a silicon carbide ingot having one surface; a cutting start step of starting a cutting at a second edge having a distance of r×a along an edge of the one surface from the first edge in a direction parallel to or with a predetermined off angle with respect to the one surface through the wire saw, a cutting speed being decreased to a first cutting speed in the cutting start step; a cutting proceeding step in which the first cutting speed is substantially constant within a variation of about ±5% of the first cutting speed; and a finish step in which the cutting speed is increased from the first cutting speed and the cutting of the silicon carbide ingot is completed.

Manufacturing method of silicon carbide wafer, silicon carbide wafer and system for manufacturing wafer

A wafer manufacturing method, an epitaxial wafer manufacturing method, and a wafer and epitaxial wafer manufactured thereby, are provided. The wafer manufacturing method enables the manufacture of a wafer with a low density of micropipe defects and minimum numbers of particles and scratches. The epitaxial wafer manufacturing method enables the manufacture of an epitaxial wafer that has low densities of defects such as downfall, triangular, and carrot defects, exhibits excellent device characteristics, and improves the yield of devices.

Wafer manufacturing method, epitaxial wafer manufacturing method, and wafer and epitaxial wafer manufactured thereby

A method of growing a semi-insulating SiC single crystal ingot, the method comprising the steps of: (1) placing a dopant coated with silicon carbide (SiC) and a carbon-based material into a reaction vessel containing a seed crystal fixed thereto; and (2) growing a SiC single crystal on the seed crystal, thereby yielding a high-quality semi-insulating SiC single crystal ingot with a uniform thickness-based doping concentration. In addition, another embodiment relates to a method of growing a semi-insulating silicon carbide single crystal ingot, the method comprising the steps of: (a) placing in a reaction vessel, a composition comprising a carbon-containing polymer resin, a solvent, a dopant, and silicon carbide (SiC); (b) solidifying the composition; and (c) growing a SiC single crystal ingot on a seed crystal fixed to the reaction vessel, thereby yielding a high-quality semi-insulating SiC single crystal ingot with a uniform thickness-based doping concentration.

Apparatus for growing a SiC single crystal ingot comprising a filter unit having a porous body surrounding an opening unit that is located under a seed crystal

The wafer having a retardation distribution measured with a light having a wavelength of 520 nm, wherein an average value of the retardation is 38 nm or less, wherein the wafer comprises a micropipe, and wherein a density of the micropipe is 1.5/cmor less, is disclosed.

Wafer and method of manufacturing wafer

Example embodiments relate to a method of measurement, an apparatus for measurement, and an ingot growing system that measure properties relating an induction heating characteristic of a graphite article. The method of measurement comprises an arranging step of arranging a graphite article to the coil comprising a winded conducting wire; and a measuring step of applying power for measurement to the coil through means of measurement connected electronically to the coil, and measuring electromagnetic properties induced in the coil. The method of measurement and the like measure electromagnetic properties of graphite articles like an ingot growing container, and an insulating material, and provide data required for selecting so that further enhanced reproducibility for growth of an ingot can be secured.

Method of measuring a graphite article, apparatus for a measurement, and ingot growing system

Method of growing semi-insulating silicon carbide single crystal using dopant coated with a carbon-based material

A method of manufacturing a silicon carbide ingot, includes a preparing operation of adjusting internal space of a reactor in which silicon carbide raw materials and a seed crystal are disposed to have a high vacuum atmosphere, a proceeding operation of injecting an inert gas into the internal space, heating the internal space by moving a heater surrounding the reactor to induce the silicon carbide raw materials to sublimate, and growing the silicon carbide ingot on the seed crystal, and a cooling operation of cooling the temperature of the internal space to room temperature. The moving of the heater has a relative position which becomes more distant at a rate of 0.1 mm/hr to 0.48 mm/hr based on the seed crystal.

Method of manufacturing a silicon carbide ingot comprising moving a heater surrounding a reactor to induce silicon carbide raw materials to sublimate and growing the silicon carbide ingot on a seed crystal

An embodiment relates to a multilayer graphite sheet with excellent electromagnetic shielding capability and thermal conductivity, and a manufacturing method therefor, wherein the multilayer graphite sheet has a multilayer structure of five or more layers in total and can be manufactured to have a thick thickness of 70 &#x3bc;m or more such that the electromagnetic shielding capability can be significantly improved. In addition, the multilayer graphite sheet is manufactured by graphitizing a hybrid laminate in which heterogeneous materials are mixed such that thermal conductivity and electromagnetic shielding capability can be simultaneously realized at a lower cost, thereby being useful as a thick film sheet which used in various applications such as home appliances and electric vehicles.

Multilayer graphite sheet with excellent electromagnetic shielding capability and thermal conductivity and manufacturing method therefor

A method for preparing a SiC ingot includes: preparing a reactor by disposing a raw material in a crucible body and disposing a SiC seed in a crucible cover, and then wrapping the crucible body with a heat insulating material having a density of 0.14 to 0.28 g/cc; and growing the SiC ingot from the SiC seed by placing the reactor in a reaction chamber and adjusting an inside of the reactor to a crystal growth atmosphere such that the raw material is vapor-transported and deposited to the SiC seed.

Method for preparing SiC ingot, method for preparing SiC wafer and the SiC wafer prepared therefrom

A method of cleaning a wafer comprises: a scrubbing operation comprising treating a target wafer to be cleaned with a brush at a rotation rate of 200 rpm or less to prepare a brush cleaned wafer; and a cleaning operation comprising cleaning the brush cleaned wafer with a cleaning solution to prepare a cleaned bare wafer, wherein the cleaning operation comprises a first cleaning operation and a second cleaning operation sequentially.

Method of cleaning wafer and wafer with reduced impurities

A silicon carbide ingot producing method is provided. The method produces a silicon carbide ingot in which an internal space of a reactor is depressurized and heated to create a predetermined difference in temperature between upper and lower portions of the internal space. The method produces a silicon carbide ingot in which a plane of a seed crystal corresponding to the rear surface of the silicon carbide ingot is lost minimally. Additionally, the method produces a silicon carbide ingot with few defects and good crystal quality.

Method and system for producing silicon carbide ingot

A wafer having relaxation moduli different by 450 GPa or less, as determined by dynamic mechanical analysis, when loaded to 1 N and 18 N with a loading rate of 0.1 N/min at a temperature of 25&#xb0; C.

Growing community of inventors

Suwon-si, South Korea

Jung-Gyu Kim