• 제목/요약/키워드: Conductive ink

검색결과 97건 처리시간 0.027초

초발수 현상을 이용한 나노 잉크 미세배선 제조 (Fabrication of Micro Pattern on Flexible Substrate by Nano Ink using Superhydrophobic Effect)

  • 손수정;조영상;나종주;최철진
    • 한국분말재료학회지
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    • 제20권2호
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    • pp.120-124
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    • 2013
  • This study is carried out to develop the new process for the fabrication of ultra-fine electrodes on the flexible substrates using superhydrophobic effect. A facile method was developed to form the ultra-fine trenches on the flexible substrates treated by plasma etching and to print the fine metal electrodes using conductive nano-ink. Various plasma etching conditions were investigated for the hydrophobic surface treatment of flexible polyimide (PI) films. The micro-trench on the hydrophobic PI film fabricated under optimized conditions was obtained by mechanical scratching, which gave the hydrophilic property only to the trench area. Finally, the patterning by selective deposition of ink materials was performed using the conductive silver nano-ink. The interface between the conductive nanoparticles and the flexible substrates were characterized by scanning electron microscope. The increase of the sintering temperature and metal concentration of ink caused the reduction of electrical resistance. The sintering temperature lower than $200^{\circ}C$ resulted in good interfacial bonding between Ag electrode and PI film substrate.

용해도 낮은 금속을 이용한 전기 전도성 잉크 (Conductive Inks Manufactured with the Help of Low Melting Metals)

  • 한국남;김남수
    • 한국공작기계학회논문집
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    • 제17권1호
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    • pp.126-131
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    • 2008
  • In this investigation, various factors affecting manufacturing conductive inks are presented, examined and discussed. The discussion includes inherent difficulties in making conductive inks successful and at the same time offers ways in which these difficulties might be overcome. One of the solutions to overcome such difficulties is to use low melting metals and alloys. This aspect is also detailed.

잉크젯 프린팅 기술을 이용한 나노 금속잉크의 인쇄회로기판용 미세배선 형성 (Micro Patterning of Nano Metal Ink for Printed Circuit Board Using Inkjet Printing Technology)

  • 박성준;서상훈;정재우
    • 한국정밀공학회지
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    • 제24권5호
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    • pp.89-96
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    • 2007
  • Inkjet printing has become one of the most attractive manufacturing techniques in industry. Especially inkjet printing technology will soon be part of the PCB (Printed Circuit Board) fabrication processes. Traditional printing on PCB includes screen printing and photolithography. These technologies involve high costs, time-consuming procedures and several process steps. However, by inkjet technology manufacturing time and production costs can be reduced, and procedures can be more efficient. PCB manufacturers therefore willingly accept this inkjet technology to the PCB industry, and are quickly shifting from conventional to inkjet printing. To produce the printed circuit board by the inkjet technology, it must be harmonized with conductive nano ink, printing process, system, and inkjet printhead. In this study, micro patterning of conductive line has been investigated using the piezoelectric printhead driven by a bipolar voltage signal is used to dispense 20-40 ${\mu}m$ diameter droplets and silver nano ink which consists of 1 to 50 nm silver particles that are homogeneously suspended in an organic carrier. To fabricate a conductive line used in PCB with high precision, a printed line width was calculated and compared with printing results.

Highly Sensitive Stretchable Electronic Skin with Isotropic Wrinkled Conductive Network

  • Seung Hwan Jeon;Hyeongho Min;Jihun Son;Tae Kon Ahn;Changhyun Pang
    • 센서학회지
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    • 제33권1호
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    • pp.7-11
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    • 2024
  • Soft-pressure sensors have numerous applications in soft robotics, biomedical devices, and wearable smart devices. Herein, we present a highly sensitive electronic skin device with an isotropic wrinkled pressure sensor. A conductive ink for soft pressure sensors is produced by a solution process using polydimethylsiloxane (PDMS), poly 3-hexylthiophene (P3HT), carbon black, and chloroform as the solvents. P3HT provides high reproducibility and conductivity by improving the ink dispersibility. The conductivity of the ink is optimized by adjusting the composition of the carbon black and PDMS. Soft lithography is used to fabricate a conductive elastic structure with an isotropic wrinkled structure. Two conductive elastic structures with an isotropic wrinkle structure is stacked to develop a pressure sensor, and it is confirmed that the isotropic wrinkle structure is more sensitive to pressure than when two elastic structures with an anisotropic wrinkle structure are overlapped. Specifically, the pressure sensor fabricated with an isotropic wrinkled structure can detect extremely low pressures (1.25 Pa). Additionally, the sensor has a high sensitivity of 15.547 kpa-1 from 1.25 to 2500 Pa and a linear sensitivity of 5.15 kPa-1 from 2500 Pa to 25 kPa.

EHD Ink Jet Printing 기술을 이용한 Conductive Particle의 전기전도도에 미치는 영향 (Effect of Conductive Particles on Electrical Conductivity using EHD Ink Jet Printing Technology)

  • 안주훈;이용찬;최대산;이창열
    • 항공우주시스템공학회지
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    • 제12권6호
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    • pp.1-8
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    • 2018
  • 투명 전극에 사용되는 필름인 이방성전도필름은 전도성 입자를 재료로 하여 열 압착법으로 제조되고 있다. 하지만 열 압착법은 낭비되는 재료가 많고 공정이 복잡하다는 단점을 가지고 있으며, 이와 같은 단점을 극복하기 위해 전도성 입자 잉크를 이용한 잉크젯 프린팅 기술을 제안하였다. 잉크의 특성 및 프린팅 조건은 패터닝 선 두께에 영향을 주게 되며, 미세 패터닝을 위한 최적 조건 도출이 중요하다. 본 논문에서는 전도성 입자 잉크를 제작하였으며, 노즐의 두께와 유량을 변화하여 패터닝 결과물을 제작하였고, 전도성 입자 잉크의 토출에 따른 전기전도도를 도출하였다.

금속입자가 전도성 잉크의 전도도에 미치는 영향 (Effect of Metal Powders on the Conductivity of Conductive Inks)

  • 권두효;정태의;김남수;한국남
    • 한국공작기계학회논문집
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    • 제17권2호
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    • pp.97-103
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    • 2008
  • In this investigation, conductivity of conductive inks was measured. A particular attention has been given to the effect of metal powders with various conductivity on the overall conductivity of the bulk ink. The conductivity of various solutions simulating conductive inks consisting of copper and silver was measured and the results have been discussed in relation to various applications of conductive inks in practice. A conductivity model simulating systems consisting of various materials has been introduced and the results were discussed. Materials of good conductivity are adversely affected by mixing with materials of poor conductivity simply through serial connection. However, parallel connection has rather little effect on the overall conductivity. The practical implication of various mixtures of materials on conductive inks has been discussed.

그라비어 방식을 이용한 전극 인쇄 시 전도성 잉크의 물성이 인쇄성에 미치는 영향 (Effect of Properties of Conductive Ink on Printability of Electrode Patterning by Gravure Printing Method)

  • 남기상;윤성만;이승현;김동수;김충환
    • 한국정밀공학회지
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    • 제30권6호
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    • pp.573-577
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    • 2013
  • The one of the most important issue in roll-to-roll gravure printing is increase of ink transfer ratio or printability. As the result of high ink transfer ratio or printability, we can assess the quality of the printed patterns. The rheological properties are the important factors for the printability of electrodes patterning. In this study, the rheological properties of conductive ink are controlled by adding the solvent. The inks with different rheological properties are used for the patterning of the electrodes of $100{\mu}m$ by gravure printing equipment. The various printing speed, which also affect the rheological properties of conductive ink, is applied and the printed patterns are compared for their width and aspect ratio. Decreasing in the ink viscosity as well as increasing in the printing speed decreases the printability in gravure patterning, which shows that the rheological properties are important factors for the printability of gravure patterning.