baber/WOPTO huggingface dataset:
Patent KR-20200130743-A (KR)
Title: 시일 표면을 갖는 정전 척
Inventor: BREILING PATRICK G
IPC: H02N13/00
Filed: 2019-04-04
Abstract: 페데스탈들을 위한 장치들 및 시스템들이 제공된다.  예시적인 페데스탈은 평면형이고, 바디의 수직 중심 축에 수직이고, 방사상 두께를 갖는 상부 환형 시일 표면, 상부 환형 시일 표면으로부터 오프셋된 하부 리세스 표면, 및 하부 리세스 표면으로부터 돌출하는 복수의 MCA들 (micro-contact areas) 로서, MCA 각각은 하부 리세스 표면으로부터 제 1 거리 이하인 제 2 거리만큼 오프셋된 상단 표면을 갖는, 복수의 MCA들 및 바디 내 하나 이상의 전극들을 갖는 바디를 가질 수도 있다.  상부 환형 시일 표면은 반도체 기판이 페데스탈에 의해 지지될 때 반도체 기판의 외측 에지를 지지하도록 구성될 수도 있고, 상부 환형 시일 표면 및 MCA들의 상단부들은 반도체 기판이 페데스탈에 의해 지지될 때 반도체 기판을 지지하도록 구성될 수도 있다.
Patent KR-20200143469-A (KR)
Title: 광-디지털 변환을 위한 광-디지털 변환기 장치 및 방법
Inventor: RANGANATHAN ROHIT
IPC: H03M1/46
Filed: 2019-04-16
Abstract: 광-디지털 변환을 위한 방법은 시간 적분기 회로(10)를 기준 조건으로 설정하는 단계 및 적분 시간(Atime)의 기간 동안 센서 디바이스(PD)로부터 전하를 적분하는 것을 시작하는 단계를 포함한다. 적분 신호(OPOUT)가 생성되고 적분된 전하를 나타낸다. 적분 신호(OPOUT)는 조정가능한 기준 신호(Vref)와 비교된다. 제1 카운트(C1)는 비교가 적분 신호(OPOUT)가 적분 범위(Vdiff)에 도달하였다는 것을 나타낼 때 생성되며, 여기서 적분 범위(Vdiff)는 로우(low) 및 하이(high) 전압(VL, VH)에 의해 정의된다. 제2 카운트(C2)는 비교가 적분 신호(OPOUT)가 조정가능한 기준 신호(Vref)에 도달하였다는 것을 나타낼 때 생성된다. 조정가능한 기준 신호(Vref)는 제2 카운트(C2)가 생성되었을 때 이산 스텝들로 증가된다. 그 다음, 시간 적분기 회로(10)는 비교가 적분 신호(OPOUT)가 적분 범위(Vdiff)에 도달하였다는 것을 나타낼 때, 기준 조건으로 재설정된다. 생성된 제1 카운트들은 제1 카운트 신호(CT_LOUT)로서 수집되고 생성된 제2 카운트들은 제2 카운트 신호(CT_COUT)로서 수집된다. 최종적으로, 디지털 출력 신호(ADC_OUT)는 제1 카운트 신호(CT_LOUT) 및 제2 카운트 신호(CT_COUT)에 따라 생성된다.
Patent KR-20210010465-A (KR)
Title: 미오신 2 이소형을 선택적으로 억제하는 약제학적으로 효과적인 화합물
Inventor: MALNASI CSIZMADIA ANDRAS
IPC: A61P25/18
Filed: 2019-04-18
Abstract: 본 발명은 화학식 I 또는 II의 화합물 및 에난티오머, 부분입체이성체, 라세미 혼합물, 에난티오머의 혼합물, 또는 이들의 조합을 포함하는 이의 약제학적으로 허용되는 염, 용매화물, 토토머, 입체이성체, 및 상기 화합물의 약제학적 용도에 관한 것이다. 
화학식 I 
   
화학식 II
Patent KR-20210014636-A (KR)
Title: 고체 폴리머 주변 에지 절연체를 구비한 바이폴라 셀을 포함하는 배터리
Inventor: ANGERBAUER RALF
IPC: H01M10/0525
Filed: 2019-05-17
Abstract: 배터리는 전기 화학 셀의 적층 배열을 포함한다. 각각의 전기 화학 셀은 셀 하우징이 없으며, 기판, 상기 기판의 제 1 표면에 형성된 제 1 활물질 층, 및 상기 기판의 제 2 표면에 형성된 제 2 활물질 층을 갖는 바이폴라 플레이트를 포함한다. 각각의 셀은 적어도 하나의 활물질 층을 캡슐화하며 셀 스택의 주어진 셀을 셀 주변을 따라 포함하는 셀 스택의 인접 셀로부터 전기적으로 절연시키는 고체 전해질 층을 포함한다.
Patent KR-20210006920-A (KR)
Title: 에어로졸 발생 장치용 먼지-기피성, 열-반사성 코팅
Inventor: DESNERCK SIMON
IPC: A24F40/70
Filed: 2019-06-13
Abstract: 본 발명은 흡입 가능한 증기를 발생시키기 위한 에어로졸 발생 장치에 관한 것이며, 여기서 에어로졸 발생 장치는 에어로졸 발생 물품을 수용하도록 구성된 가열 챔버를 포함한다. 가열 챔버의 내벽은 코팅을 포함한다. 이러한 코팅은 결합제 재료 및 결합제 재료에 매립된 금속 입자를 포함한다. 대안적으로, 코팅은 금속 합금을 포함한다. 코팅은 열-반사성 및 먼지-기피성을 갖도록 구성된다.
Patent KR-20210003261-A (KR)
Title: 차량 침입 감지 및 방지 시스템
Inventor: NA SANG HYUCK
IPC: H04L12/40
Filed: 2019-05-28
Abstract: 차량 침입 감지 및 방지 시스템이 제공된다. 차량 침입 감지 및 방지 시스템은 네트워크 방화벽의 룰 세트를 보안 위협에 대응한 룰 세트로 실시간에 갱신하고 네트워크 방화벽에서 감지한 보안 위협에 대한 보안 로그를 수집 및 관리한다. 이로써 차량 네트워크 보안에 위협이 되는 침입에 대한 신속한 대응이 가능하다.
Patent KR-20210065069-A (KR)
Title: 공유 엔코더 생성 방법, 장치 및 전자 기기
Inventor: DONG DAXIANG
IPC: G06N20/00
Filed: 2020-04-07
Abstract: 본 출원은 공유 엔코더 생성 방법, 장치 및 전자 기기를 제공하는데 이는 컴퓨터 분야에 속한다. 여기서, 당해 방법은, 메인 노드가 서브 노드에 공유 엔코더의 트레이닝 명령을 송신하고, 상기 트레이닝 명령에는 트레이닝 해야 할 목표 공유 엔코더의 유형이 포함되어 각각의 서브 노드가 목표 공유 엔코더의 유형에 따라 트레이닝 샘플을 획득하는 단계; 각 서브 노드에 의해 리턴된 확인 정보를 획득한 후, 각 서브 노드에 트레이닝 해야 할 목표 공유 엔코더의 초기 파라미터 집합을 송신하여 각 서브 노드가 각자의 트레이닝 샘플을 이용해 상기 목표 공유 엔코더의 초기 파라미터 집합을 트레이닝하는 단계; 각 서브 노드에 의해 리턴된 목표 공유 엔코더의 업데이트 파라미터 집합을 획득하는 단계; 및 제1 사전 설정된 규칙 및 각 서브 노드에 의해 리턴된 목표 공유 엔코더의 업데이트 파라미터에 따라 상기 목표 공유 엔코더에 대응하는 목표 파라미터 집합을 결정하는 단계; 를 포함한다. 이와 같은 공유 엔코더 생성 방법을 통해 여러 분야 트레이닝 코퍼스의 획득 난이도와 원가를 낮추고 공유 엔코더의 기능을 제고시킨다.
Patent KR-20210006449-A (KR)
Title: Pdcch 블라인드 검출 방법, 단말 및 네트워크 측 기기
Inventor: WANG JIAQING
IPC: H04W76/28
Filed: 2019-05-29
Abstract: 본 개시는 PDCCH 블라인드 검출 방법, 단말 및 네트워크 측 기기를 제공한다. 상기 방법은, 단말이 에너지 절감 신호 창 내에서 에너지 절감 신호를 검출하는 단계; 및 상기 에너지 절감 신호가 검출되면, 상기 단말은 목표 시간 내에 PDCCH를 블라인드 검출하는 단계 - 상기 목표 시간과 상기 에너지 절감 신호가 검출된 위치 간의 거리는 미리 설정된 시간 거리 범위 내에 있음 -;을 포함한다.
Patent KR-20210010566-A (KR)
Title: 클래드 강판 및 그 제조 방법
Inventor: SAKAI RYOSUKE
IPC: C22C38/58
Filed: 2019-06-25
Abstract: 인장 강도 : 535 ㎫ 이상을 확보하면서, 저온 인성을 더욱 향상시킴과 함께, 내 HIC 특성도 우수한 클래드 강판을 제공한다.     모재 강판의 편면에, 내식성 합금으로 이루어지는 클래딩재가 접합되어 있는 클래드 강판에 있어서, 모재 강판이 ACR 및 P HIC  의 값을 적정하게 제어한 성분 조성을 갖고, 또, 모재 강판이, 모재 강판의 판 두께 방향의 판 두께 1/2 위치에 있어서, 면적률로 94 ％ 이상의 베이나이트를 갖고, 또한, 베이나이트의 평균 결정 입경이 25 ㎛ 이하인, 강 조직을 갖고, 또한 모재 강판과 클래딩재의 접합 계면 전단 강도를 300 ㎫ 이상으로 한다.
Patent KR-20210011446-A (KR)
Title: 구리와 니켈 및 코발트의 분리 방법
Inventor: HIGAKI TATSUYA
IPC: C22B7/00
Filed: 2019-06-21
Abstract: 본 발명은, 니켈 및 코발트와 함께 구리를 함유하는 황화물로부터, 그 구리와 니켈 및 코발트를 효율적으로 분리하는 방법을 제공하는 것을 목적으로 한다. 
본 발명은, 구리와 니켈 및 코발트를 함유하는 황화물을 미리 정해진 크기로 분쇄하고, 산용액을 이용하여, 산화 환원 전위(참조 전극: 은/염화은 전극)가 100 mV 미만인 조건 하에서 교반함으로써 침출 처리를 행하는 구리와 니켈 및 코발트의 분리 방법이다. 이 분리 방법에서는, 전술한 침출 처리에 의해, 니켈 및 코발트를 침출시킨 침출액과, 황화구리를 포함하는 침출 잔사를 생성시킨다.
Patent KR-20220099128-A (KR)
Inventor: KIM JUN KI
IPC: A61B1/00
Filed: 2021-01-04
Abstract: The present invention relates to a suction stabilizer for an objective lens, comprising: a probe mount in which an objective lens is disposed and an opening in contact with a sample is formed on one side; an elastic body which is interposed between the objective lens and the probe mount, elastically supports the objective lens, and forms a partitioned space between the objective lens and the opening; and a negative pressure formation unit which forms negative pressure by sucking air accommodated in the partitioned space and tightly fixes the sample to the opening. The suction stabilizer fixes the sample and restricts fluctuations of the sample to obtain a high-resolution image of the sample.
Patent KR-20220099020-A (KR)
Inventor: CHOI SUNG JIN
IPC: H02J7/00
Filed: 2021-01-05
Abstract: A battery balancing system for solving inconsistency between batteries in a parallel configuration of battery modules is provided. The battery balancing system according to an embodiment of the present invention includes first to n^th battery modules having multiple battery cells; first to n^th switching modules including one switch connected in series to each of the first to n^th battery modules, and one capacitor and another switch connected in parallel to the series-connected switch; a bidirectional converter connected in parallel to the first to n^th battery modules and the first to n^th switching modules; and a controller generating a control signal to control a pair of switches provided in each of the first to n^th switching modules.
Patent KR-20210007007-A (KR)
Inventor: HAN JONG KI
IPC: H04N19/176
Filed: 2021-01-06
Abstract: Disclosed is a technology related to a method for a motion vector prediction and a residual prediction for a multi-viewpoint image, and a device for performing the same. A method for decoding a motion vector for a multi-view image comprises the steps of: determining a motion prediction method performed on a current block to be decoded and a corresponding block corresponding to the current block; and generating a motion vector prediction value of the current block by using a motion vector of the corresponding block in accordance with a determined motion prediction method. Accordingly, a temporal motion vector can be adaptively predicted in accordance with the motion vector prediction method of the current block and the corresponding block.
Patent KR-20220099235-A (KR)
Inventor: LIM MYUNG HO
IPC: E04B1/76
Filed: 2021-01-06
Abstract: The present invention relates to an insulation material for easy installation of an exterior material and an exterior insulation construction method using the same and, more specifically, to an insulation material for easy installation of an exterior material and an exterior insulation construction method using the same, which may facilitate ease in installation of various exterior materials, prevent dew condensation, solidly install an insulation material body by allowing an anchor for fixing the insulation material body to be installed by means of an anchor fixing bar, and prevent the exterior material from falling. To this end, the insulation material of the present invention may comprise: an insulation material body; a plurality of ventilation grooves which are formed in the height direction of the insulation material body at the rear surface of the insulation material body to enable ventilation while suppressing dew condensation; a plurality of installation grooves which are formed to be concave in the width direction of the insulation material body at the front surface of the insulation material body and are arranged in the height direction; a plurality of mounting protrusions which protrude from the front surface of the insulation material body while being formed to be extended in the width direction of the insulation material body, and are formed to be spaced apart in the height direction of the insulation material body, such that the exterior material may be mounted at the protruding gap to be fit thereinto; and a plurality of anchor fixing bars which are installed to be inserted into the installation grooves, and, in case the insulation material body is fixed to a building by means of an anchor, allow the anchor to be solidly fixed at the insulation material body.
Patent KR-20220099785-A (KR)
Inventor: JUNG HO YOUNG
IPC: H01M4/86
Filed: 2021-01-07
Abstract: The present invention relates to a polymer electrolyte fuel cell, and specifically, to an electrode composite for a polymer electrolyte fuel cell capable of improving the activity of an electrode by maximizing the formation of a three-phase interface formed by a catalyst/a binder/a fuel in an electrode catalyst layer of the polymer electrolyte fuel cell, a manufacturing method thereof, an electrode including the same, and a fuel cell including the electrode.
Patent KR-20210090112-A (KR)
Title: Method of manufacturing semiconductor device, substrate processing apparatus, and program
Inventor: KAMAKURA TSUKASA
IPC: C23C16/34
Filed: 2021-01-08
Abstract: The film quality of an oxide film formed on a substrate is improved. A method includes the processes of: (a) forming a nitride film by supplying a film forming gas to a substrate; (b) forming an oxide film of a predetermined thickness on the surface of the substrate by performing a plurality of cycles of non-simultaneously performing a process of oxidizing a nitride film and converting the nitride film into a first oxide film by supplying an oxidizing gas to the substrate. The maximum distance from the interface between the nitride film formed in (a) and the underlying layer of the nitride film to the surface of the nitride film is 2 nm or more and 4 nm or less.
Patent KR-20220102976-A (KR)
Title: Server, washing machine and washing system having thereof
Inventor: KIM KYUNG JAE
IPC: D06F33/38
Filed: 2021-01-14
Abstract: A server, a washing machine, and a washing system including the same are disclosed. The washing system includes the washing machine; and the server which receives information on the turbidity of washing water from the washing machine at predetermined time intervals, determines a change rate of the washing water turbidity information per the predetermined time interval based on the received turbidity information, predicts washing water turbidity information based on the change rate of the washing water turbidity information, and transmits a control signal for controlling a washing cycle of the washing machine to the washing machine based on the predicted washing water turbidity information.
Patent KR-20210009406-A (KR)
Inventor: JANG SUNG TACK
IPC: B26D3/00
Filed: 2021-01-18
Abstract: The present invention relates to a method for removing an end of a mineral insulated (MI) cable which can be automatically removed by setting a stripping condition in accordance with a specification of the MI cable. Moreover, the method for removing an end of a MI cable can be accurately removed without an error due to abrasion of a rotating blade by resetting a starting position of the rotating blade in removing a shell of the MI cable with the rotating blade.
Patent KR-20220106336-A (KR)
Title: Semiconductor device and method for fabricating the same
Inventor: PARK JUNG MIN
IPC: H01L49/02
Filed: 2021-01-22
Abstract: A semiconductor device is provided. The semiconductor device includes a landing pad disposed on a substrate; a lower electrode disposed on the landing pad and connected to the landing pad; a capacitor dielectric film disposed on the lower electrode and including a tetragonal crystal system and an orthorhombic crystal system; a first doped layer disposed between the lower electrode and the capacitor dielectric film and doped with a first metal; and an upper electrode disposed on the capacitor dielectric film.
Patent KR-20220107449-A (KR)
Inventor: PARK MUN JO
IPC: F24F110/20
Filed: 2021-01-25
Abstract: According to the present invention, a wet type air purifier comprises: a container body vertically stood on an indoor floor of a building to store disinfection fluid and having a ring-shaped ceramic filter; a pipe body positioned inside the container body to protrude from the inside of the container body to the outside and to have a columnar ceramic filter and a nozzle structure; an air flow connection disk positioned below the pipe body inside the container body to open a first air passage between the container body and the pipe body and a second air passage inside the pipe body; and an air flow separation disk surrounding the pipe body to penetrate the pipe body, spaced from the container body, and having an air quality sensor.
Patent KR-20220108370-A (KR)
Inventor: PARK YANG WOO
IPC: B63C9/20
Filed: 2021-01-27
Abstract: An intelligent distress notification module for attaching a life jacket includes: an operation switch activated by a detection result of a moisture sensor or a manual button; a 3D motion sensor for detecting a motion of a user; a satellite location module for receiving satellite location information; an operation control part for determining a distress state of the user based on the current state of the operation switch and an operation pattern of the user detected by the 3D motion sensor; and a communication module for transmitting distress information data including a unique identification number and a time satellite location information according to the control of the operation control part to the outside.
Patent KR-20220110386-A (KR)
Inventor: PARK HONG SEOG
IPC: G01N27/414
Filed: 2021-01-29
Abstract: The present invention relates to an apparatus and a method for detecting a sample by using a nanowire FET, wherein the apparatus comprises a source electrode connector and a drain electrode connector that can be electrically connected to a source electrode and a drain electrode of a nanowire FET, and is configured to measure the current flowing from the source electrode to the drain electrode of the nanowire FET through an I-V converter, an operational amplifier, and an ADC, thereby enabling sample detection using the nanowire FET and removing the need for large-scale fine current measuring equipment so as to miniaturize the apparatus.
Patent KR-20220116721-A (KR)
Title: Photosensitive Resin Composition
Inventor: CHOI HYUNG OUK
IPC: G03F7/004
Filed: 2021-02-15
Abstract: The present invention relates to a liquid type photosensitive resin composition having excellent developability and deep curing properties. The photosensitive resin composition includes a photosensitive resin, an epoxy resin, and a photoinitiator, wherein the epoxy resin includes a bisphenol-type epoxy resin and a biphenyl epoxy resin, and the photoinitiator includes one or more first photoinitiator whose effective absorption wavelength is 250 to 320 nm and one or more second photoinitiator whose effective absorption wavelength is 370 to 450 nm.
Patent KR-20220116899-A (KR)
Title: Real-time IP network performance evaluation method and device using artificial intelligence
Inventor: NAM CHANG SUP
IPC: G06N3/02
Filed: 2021-02-16
Abstract: The present invention relates to performance evaluation of an IP network. More specifically, provided are a real-time IP network performance evaluation method using artificial intelligence and a device thereof, to make the performance measurement of the IP network more efficient and reliable by using artificial intelligence. The method includes the steps of: (a) receiving traffic performance measurement data from an IP network; and (b) taking the traffic performance measurement data received in the step (a) as an input, comparing the performance of the IP network with a pre-learned artificial intelligence model, and classifying the performance of the IP network.
Patent KR-20220120346-A (KR)
Title: Gap prevention structure
Inventor: JUNG DONG JIN
IPC: E01D21/00
Filed: 2021-02-23
Abstract: Disclosed is a structure step prevention structure. The structure step prevention structure according to the present invention comprises: an upper part structure which allows passage of a vehicle or a person; a support unit supporting the upper part structure; and a lower part structure provided at a lower part of the support unit. When a step of a preset interval occurs between the support unit and the upper part structure or between the support unit and the lower part structure, after a filling pad is inserted into the step, a filling material is injected into the filling pad and cured to fill the step.
Patent KR-20220124531-A (KR)
Title: Food waste disposal apparatus installed in the apartment complex
Inventor: KIM BYEONG HWAN
IPC: B30B9/20
Filed: 2021-03-03
Abstract: A food waste disposal structure installed in an apartment complex according to the present invention comprises: a water washing member (10) for washing food waste (W) with water; a first waste transfer member (20) guiding the food waste (W), inputted into a waste inlet (61), to slide down toward the lower center; moisture removal members (30) removing moisture from the food waste (W) while rotationally moving in opposition to each other by a controller (32) connected to a drive motor; a second waste transfer member (40) for dropping the food waste (W) solidified in a semi-dry form from which moisture is removed to waste collection members (50); the waste collection members (50) entering and exiting both side surfaces of a concrete block (60) in order to carry out, to the outside, the food waste (W) solidified in a semi-dry form from which moisture is removed; and the concrete block (60) supporting and fixating the components. Costs for recycling and disposing of the food waste can be reduced.
Patent KR-20220124857-A (KR)
Title: Tape temporary sticking unit for pouch type secondaty battery taping device
Inventor: JEONG JONG HONG
IPC: B65H35/00
Filed: 2021-03-04
Abstract: An objective of the present disclosure is to provide a temporary taping unit for a pouch-type secondary battery taping device that enables fast and accurate temporary taping of a tape on a folding unit. The disclosed temporary taping unit for a pouch-type secondary battery taping device comprises: a suction/adhesive means for vacuum adsorbing a tape taken out from a tape supply unit and temporarily taping the cut tape formed when the tape is cut by the tape supply unit on a folding part of a secondary battery guided to a temporary taping position; a linear movement means for linearly movably supporting the suction/adhesive means so that the tape is vacuum-adsorbed and the cut piece of the tape is temporarily attached to the folding part; and a rotational movement means for vacuum adsorbing the tape and rotationally moving the suction/adhesive means and the linear movement means to the tape supply unit and the temporary taping position so as to temporarily attach the cut piece of the tape to the folding part.
Patent KR-20220126052-A (KR)
Inventor: LEE HYUN JEONG
IPC: H01B9/02
Filed: 2021-03-08
Abstract: The present invention relates to a carbon-coated non-magnetic heating wire, and more particularly, to a carbon-coated non-magnetic heating wire including a configuration in which carbon is coated as a main material between a secondary heater wire and an outer insulator. According to one aspect of the present invention, a carbon-coated part coated with carbon as a main material between the secondary heater wire and the outer insulator has an effect of emitting far infrared rays. In addition, the present invention has an effect of preventing leakage of a magnetic field to the outside of the heating wire by canceling an induced magnetic field. Furthermore, since far-infrared rays are emitted from the carbon-coated part by generated heat, an effect of far-infrared rays can be provided to users of electric mats equipped with heating wires.
Patent KR-20220126549-A (KR)
Title: Electronic device and method for inputting data on data input field
Inventor: LEE KANGMIN
IPC: G06F9/54
Filed: 2021-03-09
Abstract: According to various embodiments, an electronic device comprises: a communication module; a display; at least one processor operably connected with the communication module and the display; and a memory. The memory, when executed, may store instructions set for the at least one processor to: display an application screen of an application being executed on the display; identify a data input field included in the application screen; identify a data type corresponding to the data input field by using the application information and screen recognition information of the application screen; display at least one peripheral external electronic device capable of providing data of the identified data type; receive the data corresponding to the identified data type from an external electronic device selected among the at least one external electronic device; and input the received data into the data input field. Various other embodiments can also be possible. According to the present invention, while the application is executed, the data to be input into the data input field is received from the external electronic device and the received data is automatically input into the data input field such that the data can be input even if a user does not know the data to be input, it is difficult to search, or it is difficult to directly input data.
Patent KR-20220127473-A (KR)
Title: Manufacture method of wood furniture
Inventor: KIM OH SUK
IPC: B27K3/02
Filed: 2021-03-11
Abstract: The present invention relates to a manufacturing method of wooden furniture, comprising: a material preparation step of washing wooden boards and corner connectors by spraying water containing sterilizing liquid with high pressure and then drying the same; a processing step of performing a groove processing to form a fitting groove on the corner connectors and a protrusion processing to form a fitting protrusion at an end of the wooden boards; a coupling step of arranging the plurality of processed wooden boards in an orthogonal direction, arranging the corner connectors at corners of both sides of the wooden boards, and fitting and coupling the wooden boards with the corner connectors; and a surface formation step of forming a flame retardant layer by applying a flame retardant to a surface of the coupled wooden boards and corner connectors, and forming a surface layer by applying colorless and matte paint to a surface of the flame retardant layer. The manufacturing method is safe and preserves a sense of beauty of a unique pattern of the wood.