Abstract:
PURPOSE: A method for manufacturing graphene using laser, the graphene manufactured by the same, and an apparatus for manufacturing the same are provided to manufacture graphene of desired patterns by selectively irradiating laser to a desired substrate region. CONSTITUTION: A method for manufacturing graphene includes the following: reacting gas containing carbon is in contact with a substrate(201); laser beam is irradiated to the substrate in contact with the reacting gas to decompose the reacting gas; graphene(204) is grown on the substrate based on the decomposition of the reacting gas. No metal catalyst layer is included in the substrate. The substrate includes a silicon oxide layer(202) as an upper layer. Laser beam is irradiated to one region of the substrate. The graphene is grown at the laser beam irradiated region of the substrate. The temperature of the graphene growing process is between 900 and 2000 degrees Celsius.
Abstract:
레이저를 이용한 반도체 소자 제조방법, 이에 의하여 제조된 그래핀 반도체 및 그래핀 트랜지스터가 제공된다. 본 발명에 따른 반도체 소자 제조방법은 기판상에 붕소 함유 도핑가스 및 질소 함유 도핑 가스를 동시에 흘리면서, 레이저 빔을 상기 기판에 조사하여 질화붕소층을 형성시키는 단계를 포함하는 것을 특징으로 하며, 본 발명의 반도체 소자 제조방법은 그래핀과 동일한 결정구조를 갖는 질화붕소(Boron Nitride(BN))를 레이저 빔으로 제조한다. 더 나아가, 상기 질화붕소층 상에 동일 방식으로 그래핀을 적층하고, 다시 레이저 빔으로 이를 패터닝하여, 그래핀 소자의 밴드갭을 조절하며, 그 결과 그래핀 반도체 소자가 효과적으로 제조될 수 있다. 따라서, 종래의 실리콘 기판에서 제조된 트랜지스터 소자보다 캐리어 이동도가 상당 수준 향상된다.
Abstract:
PURPOSE: A method for improving graphene characteristic based on laser, a method for manufacturing graphene using the method, graphene manufactured by the method are provided to obtain graphene at low temperatures and to obtain flexible graphene elements. CONSTITUTION: Graphene grown on a substrate(101) is thermally treated by irradiating laser beam. The graphene is grown at low temperatures of 400 degrees Celsius or less. The substrate is a plastic substrate. A method for manufacturing the graphene includes the following: the laser beam is moved; a plurality of times of thermal treatment is implemented toward whole graphene region; graphene structures are re-aligned in planar hexagonal structures.
Abstract:
PURPOSE: A graphene semiconductor device and a manufacturing method thereof are provided to economically form a graphene transistor. CONSTITUTION: Graphene(102) is formed on a substrate(101) under the oxygen atmosphere. A laser beam is irradiated to the graphene. The substrate is a SiC substrate. Carbon of the SiC substrate is evaporated by the laser beam. The graphene is pattered by irradiating the graphene with the laser beam and a graphene semiconductor device is manufactured. The patterned graphene has a nano ribbon-shape. The width of the nano ribbon is less than 10nm. Source and drain domains in which impurities are doped are formed by irradiating both ends of the graphene semiconductor device with the laser beam.
Abstract:
레이저를 이용한 그래핀 열처리 방법, 이를 이용한 그래핀 제조방법 및 이에 의하여 제조된 그래핀이 제공된다. 본 발명에 따른 그래핀 특성 향상 방법은 기판 상에서 성장한 그래핀에 레이저 빔을 조사하여 열처리하는 단계를 포함하는 것을 특징으로 하며, 본 발명에 따른 그래핀 특성 향상 방법, 제조방법은 레이저를 이용, 기판에서 성장한 그래핀의 특성을 향상시킨다. 특히 저온에서의 그래핀 제조가 가능하므로, 플렉서블 그래핀 소자의 제조가 가능하며, 본 발명에 따라 제조된 그래핀은 향상된 물성으로 인하여, 산업적으로 이용 가능하다.
Abstract:
PURPOSE: A method for manufacturing graphene using laser, graphene manufactured by the same, and an apparatus for manufacturing the same are provided to manufacture a large sized graphene mono layer by varying the irradiating region of laser beam. CONSTITUTION: Laser beam is irradiated to a silicon carbide substrate(101). Silicon on the silicon carbide substrate is sublimated based on the irradiated laser beam. Remaining carbon is grown as a graphene structure. According to the movement of the silicon carbide substrate, a laser beam-based graphene growing region is moved. According to the movement of the laser beam, the laser beam-based graphene growing region is moved. A temperature for growing the graphene is in a range between 900 and 2000 degrees Celsius.
Abstract:
PURPOSE: A method for manufacturing a semiconductor device using laser and a graphene semiconductor and transistor manufactured by the same are provided to improve process efficiency as well as reduce fabrication costs by performing a doping process using laser beams instead of a thermal process at high temperatures. CONSTITUTION: Laser beams are irradiated on a substrate(101). A boron nitride layer(102) is formed on the substrate. A graphene semiconductor device(104) is laminated on the boron nitride layer. Source and drain regions(105,106) are formed in both ends of a graphene semiconductor device by patterning the graphene semiconductor device. An insulating layer(107) is laminated on the graphene semiconductor device between the source and drain regions.
Abstract:
레이저를 이용한 그래핀 반도체 소자 제조방법, 이에 의하여 제조된 그래핀 반도체 소자, 이를 포함하는 그래핀 트랜지스터가 제공된다. 본 발명에 따른 그래핀 반도체 소자 제조방법은 산소 분위기 하에서 기판 상에 형성된 그래핀에 레이저 빔을 조사하여, 상기 그래핀을 패터닝하는 단계를 포함하는 것을 특징으로 하며, 본 발명에 따른 그래핀 반도체 소자 제조방법은 레이저 빔를 이용하여, 밴드 갭을 그래핀에 형성시켜, 그래핀 반도체 소자의 제조가 가능하다. 더 나아가, 그래핀의 성장과 반도체 소자를 위한 패터닝이 모두 동일한 레이저 빔 조사 방식이므로, 경제성이 우수하다. 또한, 이러한 그래핀 반도체 소자를 이용, 그래핀 트랜지스터를 경제적으로 제조할 수 있다.
Abstract:
PURPOSE: A method for manufacturing a graphene semiconductor device using laser, the graphene semiconductor device manufactured by the same and a graphene transistor including the graphene semiconductor device are provided to reduce manufacturing costs by patterning a semiconductor device and growing a graphene with the same laser beam. CONSTITUTION: A graphene is formed by firstly irradiating a laser beam to an SiC substrate(101). A graphene semiconductor device is made by pattering the graphene through the second irradiation of the laser beam. Source and drain areas doped with impurities are formed by thirdly irradiating the laser beam to both ends of the semiconductor device under a gas atmosphere with the impurities. An insulation layer(106) is laminated in a semiconductor device area between the source and drain areas. A source electrode, a drain electrode, and gate electrode are formed by patterning a metal layer(107) after the metal layer is laminated on the source and drain areas and the insulation layer.