Abstract:
PURPOSE: A manufacturing method and application of 3D plasmonic nano-funnel structure using directional photo fluidization phenomenon of azobenzene polymer is provided to precisely control shape and size of the plasmonic nano-tip structure by using a directional photo fluidization phenomenon. CONSTITUTION: A manufacturing method and application of 3D plasmonic nano-funnel structure using directional photo fluidization phenomenon of azobenzene polymer comprises next steps: transforming circular hole azobenzene polymer array to a funnel shaped azobenzene polymer array by using a directionality photo fluidization phenomenon; obtaining rubber mold by solidifying at 60-80 deg. Celsius after injecting precursor of polydimethylsiloxane(PDMS) which is includes polymer and mixture of hardener into a template; obtaining urethane based precursor film by sin coating the precursor on a glass; eliminating the rubber mold by imprinting the rubber mold on a precursor film(4) and solidifying the precursor film by irradiating ultraviolet ray.
Abstract:
본 발명은 필-오프 공정을 이용하여 선경사각이 형성된 광배향막의 제조방법에 관한 것으로서 보다 상세하게는 광반응성 올리고머가 용매에 용해된 용액을 기판위에 도포한 후 용매를 제거하고 선편광 자외선의 조사에 의해 광반응성 올리고머가 한 방향으로 배열된 광배향막을 제조하는 단계; 상기의 광배향막에 고분자 필름을 부착시킨 후 필-오프(peel-off) 공정을 이용하여 광배향막과 고분자 필름을 분리하는 단계를 포함하는 필-오프 공정을 이용하여 선경사각이 형성된 광배향막의 제조방법, 상기의 방법에 의해 선경사각이 형성된 광배향막, 상기의 방법에 의해 선경사각이 형성된 광배향막을 이용한 광배향막 액정셀의 제조방법에 관한 것이다. 선경사각, 광배향막, 필-오프, 선편광 자외선, 친수성, 광반응성 올리고머, 고분자 필름, 오존
Abstract:
PURPOSE: A method for preparing a photoalignment layer is provided to induce the formation of a pretilt angle in a photoalignment layer by aligning molecules of the surface of an alignment layer in a specific direction through the control of adhesive force between oligomer materials and polymer films in which hydrophilicity is controlled. CONSTITUTION: A method for preparing a photoalignment layer in which a pretilt angle is formed using a peel-off process comprises the steps of: applying a solution in which a photoreactive oligomer is dissolved in a solvent on a substrate, removing the solvent, and preparing a photoalignment layer in which the photoreactive oligomer is arranged in one direction by the irradiation of linear polarization ultraviolet rays; and attaching a polymer film to the photoalignment layer and separating the photoalignment layer and the polymer film using the peel-off process.
Abstract:
PURPOSE: A method for soldering electronic components by a longitudinal ultrasonic wave is provided to efficiently bond a circuit of an electronic component at a low temperature by locally generating heat in a solder bonding part by a longitudinal ultrasonic wave applied in direction parallel with pressure. CONSTITUTION: An electrical circuit is formed between electronic components by using a viscoelastic bump made of a viscoelastic material. The viscoelastic bump is formed in at least a part of the electronic components whose pads(201,221) are aligned with each other. Pressure and longitudinal ultrasonic waves are applied to the upper part of the electronic components to melt the viscoelastic bump so that a bonding part is formed between the electronic components.
Abstract:
PURPOSE: A method for evaluating quality of arc welding by using welding signal elements, that is, welding voltage, current and arc light intensity, and differential values for time of signals thereof is provided. CONSTITUTION: The method for evaluating quality of arc welding comprises the steps of calculating differential values for time of the welding signal elements by selecting one of welding signal elements such as welding voltage, welding current and arc light intensity, and distributing the calculated differential values on a two-dimensional graph as a point form; dividing the two dimensional graph into detailed sections according to welding characteristics, and tracking moving path in which points pass through the divided detailed sections, distribution of points existing in each of the detailed sections, and measured waveform of frequencies; and obtaining welding quality indices by applying weight of normal or abnormal waveform to the measured waveform in the path tracking step, and comparing the obtained welding quality indices with a set value to judge that welding quality is abnormal if the quality indices are the same or less than the set value.
Abstract:
본 발명은 고분자의 방향성 광유체화 현상을 이용한 패턴화된 미세 구조체 제작방법에 관한 것이다. 보다 상세하게는 미세패턴을 포함하는 고무몰드와 기판을 접착시켜 미세 유체 소자를 제작하는 단계, 상기 미세 유체 소자에 고분자 용액을 주입하는 단계, 고분자를 건조시켜 미세 유체관의 패턴에 따라 고분자 선 어레이를 제작하는 단계, 빛의 조사에 의해 방향성 광유체화 현상을 유도하여 미세 구조체 어레이의 모양 및 크기를 제어하는 단계, 방향성 광유체화로 구조가 제어된 고분자 어레이 위에 금속을 도포하고 고분자를 선택적으로 제거하여 고분자 모양과 같이 미세 구조체 어레이를 전사하는 단계를 포함하는 미세 구조체 어레이 제작방법으로 구성된다. 본 발명은 빛의 편광에 의해서 유체화 방향이 결정되고 빛의 조사 시간에 따라서 유체화에 의한 변형 정도가 달라지는 성질 즉, 방향성 광유체화 현상을 갖는 고분자 어레이 형틀의 모양과 크기를 정밀하게 제어하고 이렇게 제어된 형틀을 전사함으로써 규칙적으로 배열된 모양과 크기가 다양한 미세 구조체를 대면적으로 제작할 수 있다. 방향성 광유체화 현상, 패턴화된 미세 구조체, 어레이, 모세관현상
Abstract:
본 발명은 칩(chip) 또는 기판(substrate)의 패드에 형성된 솔더 범프(solder bump)에 종방향 초음파를 인가하여 저온에서 솔더 접합부를 형성하는 종방향 초음파를 이용한 전자부품의 솔더링 방법에 관한 것으로서, 본 발명의 솔더링 방법은 칩(200)의 패드(201)에 형성된 구형의 솔더 범프(210)를 기판(220)의 패드(221)와 정렬하고, 초음파 발진기(230)의 혼(horn ; 231)을 통해 칩(200)의 상부에 압력(P)과 종방향 초음파를 인가하여 솔더 범프(210)를 용융시킴으로써 칩(200)과 기판(220) 사이에 솔더 접합부를 형성하는 것이다. 따라서, 본 발명은 기존의 솔더링 방법과 비교하여 솔더 용융점 이하의 온도에서 종방향 초음파를 인가하여 솔더 접합부에만 국부적인 열을 발생시켜 칩과 기판의 회로를 저온에서 효율적으로 솔더링하는 효과가 있다. 솔더링, 초음파, 종방향, 히터, 전자부품, 언더필, 패드
Abstract:
PURPOSE: An electron package using ultrasonic soldering and a packaging method therefor are provided to efficiently connect a chip with a circuit of a substrate by generating local heat while using pressure and ultrasonic waves, and to improve productivity and quality in a soldering process by forming an underfill while the soldering process is performed. CONSTITUTION: Grooves(42) are formed on a surface of the substrate(40) confronting the chip(30). A plurality of protrusions(32) corresponding to the grooves are formed on a surface of the chip so that the protrusions are respectively inserted into the groove of the substrate. Solders(46) surrounding the protrusions are positioned inside the grooves.
Abstract:
PURPOSE: A producing method of a patterned micro-structure using the directional photo fluidization of a polymer is provided to accurately control the shape and the size of the micro-structure by using a polymer array with the directional photo fluidization property. CONSTITUTION: A producing method of a patterned micro-structure comprises the following steps; attaching a rubber mold containing a micro-pattern with a substrate to produce a micro fluid device; injecting a polymer solution into the micro fluid device; drying the polymer solution for producing a polymer line array by the pattern of the micro fluid device; inducing the directional photo fluidization by irradiating light, for controlling the size and the shape of a micro-structure array; and spreading metals on the polymer line array, and selectively remove polymers for transferring the micro-structure array.