• 제목/요약/키워드: Ceramic module

검색결과 173건 처리시간 0.04초

음이온 발생용 후막형 클러스터의 제조 (Fabrication of Thick Film type Cluster for Anion Generator applications)

  • 조정환;여동훈;신효순;홍연우;박지훈;김종희
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2007년도 추계학술대회 논문집
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    • pp.464-464
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    • 2007
  • 환경오염으로 인한 각종 질병 및 증후군 등의 발생으로 가정용 산업용에서 환경관련 기술들이 다양한 분야로 확대되고 있다. 본 연구에서는 양이온 및 음이온 양쪽이온을 최대한 발생시키며, 오존 발생량은 억제하고 소비전력을 절감하고자 Ag-Pd 전극을 적용한 세라믹스 클러스터를 개발하였다. Ag-Pd 전극과 매칭되는 세라믹스 조성을 개발한 후 적층공정 기술을 이용하여 후막형 클러스터를 제조하였다. 전극 패턴모양, 전극간 방전간격 및 전극 보호층의 두께에 따른 음이온 발생량을 측정하여 최적화를 위한 실험을 진행하였으며, 음이온 발생량 100만개이상, 오존발생량 0.6ppb인 특성을 확인하였다.

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고정밀 레이저 스크라이버 장비의 공정 시뮬레이션 분석에 관한 연구 (A Study on the Process Simulation Analysis of the High Precision Laser Scriber)

  • 최현진;박기진
    • 한국기계가공학회지
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    • 제18권7호
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    • pp.56-62
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    • 2019
  • The high-precision laser scriber carries out scribing alumina ceramic substrates for manufacturing ultra-small chip resistors. The ceramic substrates are loaded, aligned, scribed, transferred, and unloaded. The entire process is fully automated, thereby minimizing the scribing cycle time of the ceramic substrates and improving the throughput. The scriber consists of the laser optical system, pick-up module of ceramic substrates, pre-alignment module, TH axis drive work table, automation module for substrate loading / unloading, and high-speed scribing control S/W. The loader / unloader unit, which has the greatest influence on the scribing cycle time of the substrates, carries the substrates to the work table that carries out the cutting line work by driving the X and Y axes as well as by adsorbing the ceramic substrates. The loader / unloader unit consists of the magazine up / down part, X-axis drive part for conveying the substrates to the left and right direction, and the vision part for detecting the edge of the substrate for the primary pre-alignment of the substrates. In this paper, the laser scribing machining simulation is performed by applying the instrument mechanism of each component module. Through this study, the scribing machining process is first verified by analyzing the process operation and work area of each module in advance. In addition, the scribing machining process is optimized by comparing and analyzing the scribing cycle time of one ceramic substrate according to the alignment stage module speed.

세라믹 VCO의 Block 특성 분석을 통한 주파수 튜닝 (The Tuning of Oscillation Frequency by the Analysis of Characteristics of each Block in Ceramic VCO)

  • 유찬세;이우성
    • 마이크로전자및패키징학회지
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    • 제11권2호
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    • pp.49-52
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    • 2004
  • 세라믹 모듈 내부에 내장되는 인덕터와 캐패시터와 같은 수동소자들은 주변 소자 및 패턴의 영향으로 모듈 내부에서는 변형된 특성을 갖게 된다. 이 때문에 수동소자들의 특성을 모듈내부에 내장된 상태로 추출하는 것이 가장 정확하다. 본 연구에서는 세라믹 VCO를 개발함에 있어서 전체 회로를 공진부와 발진부로 나누어서 각 block의 특성을 측정하였고 이를 통해 VCO의 고주파수 거동을 예측하여 개발에 활용할 수 있도록 하였다.

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세라믹 VCO 내 Block 특성 분석 (The analysis of monoblock characteristics in ceramic VCO)

  • 유찬세;김경철;이영신;이우성
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2003년도 춘계학술대회 논문집 센서 박막재료 반도체 세라믹
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    • pp.269-272
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    • 2003
  • Nowadays, the study on the ceramic components and modules using LTCC is being performed and on the passives included in modules is being done also. But the characteristics of passives changes in ceramic module due to the coupling between patterns, so each block in module must be analyzed in the state of module including coupling factors. In our research each block of VCO, resonator part, oscillator part, output part is measured and analyzed and that allows the prediction of behavior of VCO.

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공통의 Glass를 이용한 LTCC 이종소재의 무수축 접합 (Bonding of Different Materials Using Common Glass in Zero Shrinkage LTCC)

  • 장의경;신효순;여동훈;김종희
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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    • pp.298-299
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    • 2006
  • 공통의 glass를 이용한 LTCC 이종소재의 무수축 접합 가능성을 확인하기 위하여 2종의 상용 glass를 이용하여 소결온도를 변화시키면서 미세구조 및 결정구조, x-y축 방향의 수축율을 관찰하였다. 실험 결과 GA-12 glass는 강유전체 $BaTiO_3$와 glass의 composite개념을 이용한 접합에 적절하지 않은 것으로 판단되었으며, GA-1 glass의 경우는 $750^{\circ}C$$800^{\circ}C$ 사이에서 glass의 충분한 침투조건이 확인되며, 결정구조 에서도 glass/$BaTiO_3$ composite이 형성되므로 layer 간의 delamination은 발견되지만 x-y축 방향의 무수축 접합의 가능성이 확인되었다.

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Application of tube-type ceramic microfiltration membrane for post-treatment of effluent from biological wastewater treatment process using phase separation

  • Son, Dong-Jin;Kim, Woo-Yeol;Yun, Chan-Young;Kim, Dae-Gun;Chang, Duk;Sunwoo, Young;Hong, Ki-Ho
    • Environmental Engineering Research
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    • 제22권4호
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    • pp.377-383
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    • 2017
  • A tube-type ceramic membrane for microfiltration was developed, and the membrane module comprised of three membranes was also applied to biological carbon and nitrogen removal processes for post-treatment. Manufacturing the microfiltration membrane was successful with the structure and boundary of the coated and support layers within the membrane module clearly observable. Total kjeldahl nitrogen removal from effluent was additionally achieved through the elimination of solids containing organic nitrogen by use of the ceramic membrane module. Removal of suspended solids and colloidal substances were noticeably improved after membrane filtration, and the filtration function of the ceramic membrane could also easily be recovered by physical cleaning. By using the ceramic membrane module, the system showed average removals of organics, nitrogen, and solids up to 98%, 80% and 99.9%, respectively. Thus, this microfiltration system appears to be an alternative and flexible option for existing biological nutrient removal processes suffering from poor settling performance due to the use of a clarifier.

LTCC소재용 Cordierite/Glass Composite계의 유전특성 변화 (Dielectric Properties in Cordierite/Glass Composite for LTCC Material)

  • 황일선;신효순;여동훈;긴종희
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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    • pp.304-304
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    • 2007
  • 고주파 모률에서 사용되는 기판소재는 저유전율과 낮은 loss 특성을 요구함으로 지속적인 연구를 필요로 한다. 지금까지의 ceramic/glass composite 에서 주로 사용된 ceramic filler는 Al2O3로 낮은 유전률을 구현에 한계가 있었다. Cordierite는 낮은 유전율 (${\varepsilon}_r$ < 4)을 나타내는 filler로서 그 가능성이 높지만 아직까지 보고된 결과들이 미흡한 실정이다. 따라서 본 연구에서는 cordierite filler와 SiO2-B2O3-Al2O3-RO (R : Zn, Sr, Ba, Ca)계의 glass를 혼합하여 LTCC용 기판소재로서의 가능성을 확인하고자 저온 동시소성이 가능한 소결온도인 $850^{\circ}C{\sim}1.000^{\circ}C$ 사이에서 소재의 소결실험을 진행하였다. 소결온도에 따른 상변화, 유전특성을 확인한 결과 filler로 사용된 cordierite상만이 관찰 되었으며 소결조건에 따라 5.0~5.5의 낮은 유전율과 1.000~1,500의 Q를 나타내는 것을 확인 하였다.

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Sintering and Electrical Properties of Mn-doped ZnO-$TeO_2$ Ceramics

  • Hong, Youn-Woo;Baek, Seung-Kyoung;Hwang, Hyun-Suk;Shin, Hyo-Soon;Yeo, Dong-Hun;Kim, Jong-Hee
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2008년도 하계학술대회 논문집 Vol.9
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    • pp.49-49
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    • 2008
  • ZnO-based varistors have been widely used for voltage stabilization or transient surge suppression in electric power systems and electronic circuits. Recently, It has reported that the varistor behavior with nonlinear coefficient of 6~17 in Mn-doped ZnO. In this study we have chosen the composition of ZnO-$TeO_2-Mn_3O_4$ (ZTM) system to the purpose of whether varistor behavior appeared in doped ZnO by the solid state sintering or not. We investigated the sintering and electric properties of 0.5~3.0 at% Mn doped ZnO-1.0 at% $TeO_2$ system. Electrical properties, such as current-voltage (I-V), capacitance-voltage (C-V), and impedance spectroscopy were conducted. $TeO_2$ itself melts at $732^{\circ}C$ in air but forms the $ZnTeO_3$ phase with ZnO as increasing temperature and therefore retards the densification of ZnO to $1000^{\circ}C$. The average grain size of sintered samples was at about $3{\mu}m$ and decreased with increasing Mn contents. It was found that a good varistor characteristics were developed in ZTM system sintered at $1100^{\circ}C$ (nonlinear coefficient $\alpha$ ~ 60). The results of C-V characteristics such as barrier height ($\Theta$), donor density ($N_d$), depletion layer (W), and interface state density ($N_t$) in ZTM ceramics were $4\times10^{17}cm^{-3}$, 0.7 V, 40 nm, and $1.6\times10^{12}cm^{-2}$, respectively. It will be discussed about the stability and homogeneity of grain boundaries using distribution parameter ($\alpha$) simulated with the Z(T)"-logf plots in ZTM system.

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40 GHz Vertical Transition with a Dual-Mode Cavity for a Low-Temperature Co-fired Ceramic Transceiver Module

  • Byun, Woo-Jin;Kim, Bong-Su;Kim, Kwang-Seon;Eun, Ki-Chan;Song, Myung-Sun;Kulke, Reinhard;Kersten, Olaf;Mollenbeck, Gregor;Rittweger, Matthias
    • ETRI Journal
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    • 제32권2호
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    • pp.195-203
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    • 2010
  • A new vertical transition between a substrate integrated waveguide in a low-temperature co-fired ceramic substrate and an air-filled standard waveguide is proposed in this paper. A rectangular cavity resonator with closely spaced metallic vias is designed to connect the substrate integrated waveguide to the standard air-filled waveguide. Physical characteristics of an air-filled WR-22 to WR-22 transition are compared with those of the proposed transition. Simulation and experiment demonstrate that the proposed transition shows a -1.3 dB insertion loss and 6.2 GHz bandwidth with a 10 dB return loss for the back-to-back module. A 40 GHz low-temperature co-fired ceramic module with the proposed vertical transition is also implemented. The implemented module is very compact, measuring 57 mm ${\times}$ 28 mm ${\times}$ 3.3 mm.