• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.135-137
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• 2004

In this study we'll deal with the small-sized metalized film capacitors with large capacity which head have $5mm{\times}5mm{\times}2.5mm$ dimension. The lead wire is used to weld at both sides of capacitors. At that time the position gap between the welding machine and lead wire supplier would cause the welding error. Also, during the tapping processing of metalized film capacitors, the interval error among the capacitors, the length error of lead frame attached at the capacitors, and the straightness distortion of the lead frame could happen. As mentioned, four kinds of error parameters will be measured and analyzed by using the automatic visual inspection system that is implemented with CCD camera, optical parts, background lighting, and image processing algorithms. Finally we are able to achieve success rate above 99% to detect the welding faults of capacitors in the field test.

• 한국인쇄학회지
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• 제29권3호
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• pp.133-142
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• 2011

We produce a photosensitive convex plate to research a Nickel metal relief printing plate using galvanic process. A Method for preparing DLC convex plate that is metalized on Nickel metal relief printing plate using CVD(Chemical Vapor Deposition) process and $N_2DLC$-convex plate that is DLC metalized thin film layer of $N_2$ plasma surface treatment are comprised. DLC thin film layers on Nickel surface are fragile. The results of the research indicate that the coefficient of friction on DLC metalized thin film layer is relatively low than Nickel surface and the durability of Nickel surface coated DLC metalized thin film layer is superior to Nickel surface. A relative evaluation of three form plate wetting properties using varnish liquid-drop plate indicates superior printing aptitudes for $N_2DLC$, DLC, Nichel plate order as above.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2008년도 제39차 학술발표회
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• pp.143-144
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• 2008

We developed that the film fibers which was vacuum-metalized silver on the PET film played a part increasing durable on the alkali, antibiotic and another functional property. For this usage, PET film fibers with fine denier vacuum-metalized silver manufactured through changing the micro slitting machine's drive process.

• 대한건축학회논문집:구조계
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• 제34권5호
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• pp.27-34
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• 2018

Concrete placed under hot weather condition suffers from larger slump loss, rapid moisture evaporation due to high air temperature. Proper measures for material, transportation and curing should be taken to prevent the quality deterioration of the concrete under hot weather condition. In Korea, Although the period of hot weather concrete in Korea occupies only 2 months, there are a lot of quality problems including plastic, drying shrinkage and cold joint. Therefore, the objective of this paper is to investigate and compare the temperature history and crack occurrence of the concrete, which was placed in the actual apartment house construction field under hot weather condition, in response to the application of surface covered curing blankets including PE film, single layer clear bubble sheet, white colored bubble sheet and aluminum metalized bubble sheet. Test results indicated that the application of white colored bubble sheet and aluminum metalized bubble sheet showed most favorable results in terms of reduction in temperature rise and crack occurrence as well as easiness in handling. But, due to light reflection by aluminum metalized bubble sheet, it is believed that white colored bubble sheet is preferable.

• 조명전기설비학회논문지
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• 제14권4호
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• pp.77-82
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• 2000

본 논문은 교류전압 인가시 보이드 형상에 따른 금속증착 폴리프로필렌 필름(Metalized Polypropylene Film : MPPF)의 셀프힐링 특성에 대해 연구하였다. 보이드 결함으로 인해 발생하는 프리 셀프힐링의 횟수가 증가함에 따라 PDIV는 증가하였으며, 프리 셀프힐링은 FPF의 절연파괴전압보다 낮은 전압에서 발생하였다. 셀프힐링은 주로 핀형, 주름형, X/Y형 보이드의 에지, 주름선상 및 교차점에서 발생하였으며, 주셀프힐링 전압은 PFP의 두께에 따라 증가하였다. 또한, 셀프힐링시 증착금속의 비산면적은 인가전압에 따라 증가하였으며, 셀프힐링시의 피크전류는 MPPF에 인가된 전압에 따라 증가하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.1285_1286
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• 2009

본 논문에서는 지하철 인버터 회로에 사용 환경에 적합하면서 높은 과도 전압(dV/dt)에 견딜 수 있는 건식형 스너버용 커퍼시터를 설계 및 제작하여 특성을 검토하고자 한다. 필름 커패시터는 환경적 측면을 고려하여 에폭시 몰드형 건식형을 적용하였다. 증착 필름에 적용되는 금속은 Zn 전극에 비하여 Al 전극이 우수한 커패시터 특성을 나타내었으며 패턴의 경우에도 T-pattern에서 정전용량 및 손실의 변화율이 작게 나타났다. Al 금속전극에 wave-cut를 적용한 T - pattern 필름으로 DC 1650V, 12 uF, 정격전류 40 A의 커패시터를 제작하여 ESR 및 유전 손실이 적은 제품을 구현할 수 있으며 내구성 및 surge test 결과 신뢰성 규격을 만족하였다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2000년도 학술대회논문집
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• pp.155-159
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• 2000

This paper describes the self healing characteristics of metalized polypropylene film(MPPF) under ac condition. PDs were generally observed at relatively low voltage, and the PDIVs were differently varied depending on the number of pre-self healing due to void defects. Several pre-self healing events took place at lower voltage than the critical breakdown voltage of PPF. Self healing mainly occurred at pin tips, wrinkle sides, and cross points of wrinkles. The applied voltage at self healing was increased with PPF thickness. The burn out area at self healing was also increased with the applied voltage and PPF thickness. The peak currents in a grounding conductor at self healing was also increased with the applied voltage.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 E
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• pp.2389-2391
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• 1999

This paper describes the self-healing characteristics which plays an important role in high voltage capacitors. In this experiment, artificial voids were simulated in MPPFs, and the self-healing voltages were measured by varying the diameter of the voids and the thickness of the MPPFs. As a result, the self-healing voltage and the burn-out area were increased with the increment in the void diameter and the thickness of MPPF.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 C
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• pp.2110-2112
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• 2000

This paper describes the self healing characteristics of a metalized polypropylene film(MPPF) used for energy storage capacitors. In the experiment, a d.c. voltage was applied to the MPPF, and the partial discharge inception voltages(PDIVs), the applied voltages at self healing, the burn out area and the current in the grounding conductor were measured and recorded. As a result, it was found that no PDs were found till the first pre-self healing occurred, and the applied voltage at self healing was increased with PPF thickness. Self healing was much more dependant on the shape of the air void than its diameter and the burn out area and the current in the grounding conductor at self healing was also increased with the applied voltage at self healing.

• 한국음향학회지
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• 제30권4호
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• pp.215-222
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• 2011

높은 분해능의 영상을 얻는데 사용하기 위하여 초고주파 대역에서 동작하는 집속 초음파 트랜스듀서를 제작하고 그 특성을 평가하였다. 그 트랜스듀서는 한쪽 면에만 접지용 전극이 있는 두께 9 ${\mu}m$의 PVDF 압전막의 다른 쪽 면에 CCP (Copper Clad Polyimide)막을 에폭시로 접착한 후, 금속구로 압착함에 의해 구각형을 형성시키고, 그 뒷면에 에폭시를 채워 몰딩 시키는 방법에 의해 만들어졌다. 제작된 곡률반경 7.5 mm, f-number 1.7의 트랜스듀서는 초점에 있는 표적에 대한 펄스에 코 측정결과 35.0 MHz의 대역폭을 가지며, 약 40 MHz인 피크주파수 부근에서의 삽입손실은 약 60 dB 을 나타내었는데, 그 측정결과는 에폭시 접착층의 두께를 고려한 KLM 등가회로 해석에 의한 시뮬레이션 결과와 유사한 것이었다. 나아가, 그 트랜스듀서에 의해 얻어진 가는 구리선 표적에 대한 영상을 35 MHz 트랜스듀서를 장착한 UBM (Ultrasonic Backscattering Microscope) 장치에 의한 영상과 비교한 결과, 측방향 분해능은 떨어지나 축방향 분해능은 다소 향상됨을 알 수 있었다.