• 한국신뢰성학회지:신뢰성응용연구
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• 제9권4호
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• pp.331-341
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• 2009

PSA (Pressure Sensitive Adhesive) is used for various purposes in electronic appliances such as double-sided tape for fitting parts, product's name plate, and surface protecting film, and so forth. In several kinds of PSAs, this paper dealt with the failure analysis of PET (Polyethylene Terephthalate) acrylic adhesive tapes. The causes of interface failure were investigated through the test of adhesive strength, thickness, and structure. And test standard methods to prevent recurrences were established.

• 반도체디스플레이기술학회지
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• 제18권3호
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• pp.36-41
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• 2019

Hybrid-type transparent electrodes were fabricated by depositing carbon nanotubes (CNTs) via spray coating on polyethylene terephthalate (PET) substrates and then coating the CNTs with [poly(3,4-ethylenedioxythiophene)] (PEDOT) films via electro-polymerization. For all of the fabricated electrodes, their surface morphologies, electric sheet resistances, visible transmittances, and color properties (e.g., yellowness) were characterized as functions of the applied voltages and process times used in electro-polymerization. The sheet resistance of the CNTs was significantly reduced by the coating of PEDOT, while their visible transmittances slightly decreased. The yellowness values of the PEDOT-coated CNTs were observed to have substantially decreased via electro-polymerization. The experimental results confirmed that the fabricated hybrid electrodes had desirable properties for the application of transparent electrode in terms of the electrical resistance, optical transmittance, and chromaticity.

• Applied Science and Convergence Technology
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• 제23권2호
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• pp.90-96
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• 2014

Flexible $ZrO_2$ films as dielectric materials for high-energy-density capacitors were deposited on polyethylene terephthalate (PET) substrates by RF magnetron sputtering. The growth behavior, microstructure and electrical properties of the flexible $ZrO_2$ films were dependent on the sputtering pressure and gas ratio. Although $ZrO_2$ films were deposited at room temperature, all films showed a tetragonal crystalline structure regardless of the sputtering variables. The surface of the film became a surface with large white particles upon an increase in the $O_2/Ar$ gas ratio. The RMS roughness and crystallite size of the $ZrO_2$ films increased with an increase in the sputtering pressure. The electrical properties of the $ZrO_2$ films were affected by the microstructure and roughness. The $ZrO_2$ films exhibited a dielectric constant of 21~38 at 1 kHz and a leakage current density of $10^{-6}{\sim}10^{-5}A/cm^2$ at 300 kV/cm.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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• pp.125-126
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• 2006

ZnO Films have been prepared on polycarbonate (PC), polyethylene terephthalate (PET), and Coming 7059 substrates by r.f. magnetron sputtering technique. A comparison of the properties of the films deposited on polymer and glass substrates was performed. In addition, the effect of the sputter power on the structural and optical properties of these films was evaluated.

• 폴리머
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• 제25권2호
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• pp.302-310
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• 2001

무전해도금법을 이용하여 구리/PET 필름 복합재료를 제조하였으며 에칭방법과 촉매액의 조성 및 acceleration 방법을 달리하여 PET 필름과 무전해도금된 구리 피막간의 접착력을 향상시키고자 하였다. HCl 용액으로 에칭된 PET 필름은 NaOH에 의한 것보다 더욱 세밀하게 에칭되어져 구리와 PET 필름간의 접착력은 향상되었으나 전자파 차폐효과는 유사한 경향을 보였다. 촉매액의 조성변화에 따른 영향을 살펴본 결과 PdCl$_2$:SnCl$_2$의 몰비가 1:4에서 1:16으로 증가할수록 PET 필름 위에 적층된 Pd/Sn 콜로이드 입자들의 크기가 감소하며 고르게 분포되는 경향을 보였다. 따라서 이들의 몰비가 증가할수록 구리도금이 균일하고 조밀하게 이루어져 접착력 및 차폐효과가 증가하였다. 또한 NaOH보다 HCl로 acceleration한 경우 촉매 입자의 크기가 작고 더 균일하게 분포되어 우수한 접착력과 도금물성을 나타내었다.

• 한국응용과학기술학회지
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• 제33권3호
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• pp.587-592
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• 2016

본 연구에서는 유연성을 갖는 전극 제조를 위해 산 처리된 단일벽 탄소나노튜브 (Acid treated-SWCNTs)를 금이 코팅된 PET 기판 위에 스프레이 코팅하였다. 단일벽 탄소나노튜브가 가지는 단점을 보완하기 위하여 산 처리 공정을 이용하여 나노튜브에 작용기를 도입하여 분산성을 극대화 시켰으며 전기화학적 특성을 향상 시켰다. 스프레이 기술을 이용하여 제조된 유연성을 갖는 단일벽 탄소나노튜브 기반의 전극을 1 M의 황산 전해질에서 순환 전압 전류법, 임피던스 분광법 그리고 충 방전 시험을 통하여 전기화학적 특성을 분석 하였다. 그 결과, 응력을 가하지 않은 전극의 전기 용량값은 $67F{\cdot}g^{-1}$로 측정 되었으며, 1000번의 충 방전 시험 후에는 전기 용량값이 $63F{\cdot}g^{-1}$ (94 % 유지)로 감소하는 결과를 보였다. 이에 반하여, 탄소나노튜브 기반의 플렉시블 전극은 500번의 굽힘 시험 (bending test)과 6000번의 충 방전 시험 후에는 초기의 전기 용량값 ($67F{\cdot}g^{-1}$)이 유지되는 결과를 얻었다.

• 대한기계학회논문집A
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• 제26권5호
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• pp.813-821
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• 2002

Glass fiber reinforced PET matrix composite was manufactured by rapid press consolidation technique as functions of temperature, pressure and time in pre-heating, consolidation and solidification stages. The optimal manufacturing conditions for this composite were discussed based on the void content, tensile, interlaminar shear and impact properties. In addition, the levels of crystallinity with various manufacturing conditions were measured using differential scanning calorimetry to investigate the mechanical properties of this composite material as a function of crystallinity. Among many processing parameters, the mold temperature and the cooling rate after forming were found to be the most critical factors in determining the level of crystallinity and mechanical properties. The level of crystallinity affects the tensile properties to some degree. However, impact properties are affected much more. It also affects the degree of ductility, which determines the impact energy of this material.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.41-43
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• 2004

Plasma polymerized para-xylene ($PP_PX$) deposited by plasma-enhanced chemical vapor deposition (PECVD) was used as the barrier layer on the polyethylene terephthalate (PET) substrate to improve lifetime of the flexible organic light-emitting diodes (FOLEDs). The $PP_PX$ barrier layer deposited on top of the PET substrate with plasma power of 30 W at deposition pressure of 0.2 torr showed transmittance spectra good enough to be applied in FOLED on PET substrates. FOLEDs with the $PP_PX$ barrier layer (barrier-FOLEDs) showed similar I-V and B-V characteristics to FOLEDs without the $PP_PX$ layer (control-FOLEDs). The lifetime of barrier-FOLED was two times longer than that of the control-FOLED. With $PP_PX$ passivation layers, lifetimes of both control and barrier-FOLEDs were improved by more than 4 times. These results show that PECVD deposited $PP_PX$ layers can be used as barrier layers for FOLEDs on plastic substrates as well as passivation layers for general OLEDs.

• 펄프종이기술
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• 제47권6호
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• pp.147-153
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• 2015

Wet-tissue has been used for baby wipe, cleansing pads, industrial wipes, pain relief, personal hygiene, pet care, and healthcare at home, care facilities, restaurant, and hospital. Raw materials of wet-tissue are mainly natural fibers and synthetic fibers such as cotton, rayon, PET (polyethylene terephthalate) and so on. In this study, electrolytic water of NaCl solution was used as fluid in wet-tissue, and the effect of raw materials on antibacterial rate of wet-tissue was investigated. Rayon (100%) showed an excellent antibacterial rate compared with cotton (100%) and rayon:PET (50:50). Antibacterial rate increased as Cl concentration of electrolytic water increased. Absorption of rayon:PET (50:50) was uneven and antibacterial rate of wet-tissue slightly increased by increase of Cl concentration. Antibacterial rate of wet-tissue was 100% under the conditions of more than 1.5 mL of electrolytic water dosage, and dropped under 50% after storage period of 48 hours.

• 한국표면공학회지
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• 제38권2호
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• pp.69-72
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• 2005

ITO-Al-ITO multi-layers were deposited at room temperature by RF magnetron sputtering on polyethylene terephthalate (PET). The films were deposited at various pressures of $8\times10^{-4},\;1\times10^{-3},\;4\times10^{-3},\;8\times10^{-3}\;and\;1\times10^{-2}$ Torr. A correlation between microstructure and electro-optical properties was studied. Films deposited? at low pressure have higher transmission, and lower reflectance and resistance than film deposited at high pressure. Sheet resistance, transmission, and reflectance were $141.6\Omega/\Box\;88\%\;and\;6.8\%$ resectively when the deposition pressure was $8\times10^{-4}$ torr, that was the optimum condition.