주석-니켈 마이크로 분말을 이용한 EV 전력모듈용 천이액상 소결 접합

윤정원,정소은,Yoon, Jeong-Won,Jeong, So-Eun 한국마이크로전자및패키징학회 2021 마이크로전자 및 패키징학회지 Vol.28 No.2

In this study, we have successfully fabricated the Sn-Ni paste and evaluated the bonding properties for high-temperature endurable EV (Electric Vehicle) power module applications. From evaluating of the micro-structural changes in the TLPS (Transient Liquid Phase Sintering) joints with Sn and Ni contents in the Sn-Ni pastes, a lack of Ni powders and Ni particle agglomerations by Ni surplus were observed in the Sn-20Ni and Sn-50Ni joints (in wt.%), respectively. In contrast, relatively dense microstructures are observed in the Sn-30Ni and Sn-40Ni TLPS joints. From differential scanning calorimetry (DSC) thermal analysis results of the fabricated Sn-Ni paste and TLPS bonded joints, we confirmed that the complete reactions of Sn with Ni to form Ni-Sn intermetallic compounds (IMCs) at bonding temperatures occurred, and there is no remaining Sn in the joints after TLPS bonding. In addition, the interfacial reactions and IMC phase changes of the Sn-30Ni joints under various bonding temperatures were reported, and their mechanical shear strength were investigated. The TLPS bonded joints were mainly composed of residual Ni particles and Ni₃Sn₄ intermetallic phase. The average shear strength tended to increase with increasing bonding temperature. Our results indicated a high shear strength value of approximately 30 MPa at a bonding temperature of 270 ℃ and a bonding time of 30 min. 본 연구에서는 고온 대응 EV (Electric Vehicle) 전력반도체 칩 접합용 Sn-Ni 페이스트의 제조 및 특성 평가 연구가 수행되었다. Sn-Ni 페이스트의 Sn과 Ni 함량에 따른 TLPS (Transient Liquid Phase Sintering) 접합부 미세 조직 변화 관찰 결과, Sn-20Ni (in wt.%)의 경우에는 Ni 분말의 부족, 그리고 Sn-50Ni의 경우에는 Ni 분말의 과다 포함에 따른 Ni 뭉침 현상이 관찰되었다. Sn-30Ni과 Sn-40Ni의 경우에는 TLPS 접합 공정 후 상대적으로 치밀한 접합부 단면 미세 구조 조직을 가짐을 확인하였다. TLPS 접합 공정 후 접합부 시편의 DSC 열 분석 결과로부터 TLPS 접합 공정 반응 동안 Sn과 Ni의 충분한 반응이 일어남을 확인하였으며, 접합 공정 후 접합부에는 Sn이 남아 있지 않음을 확인하였다. 추가적으로 공정 온도 변화에 따른 Sn-30Ni TLPS 접합부의 계면반응 및 기계적 강도 시험이 수행되었다. TLPS 접합 공정 후 접합부는 Ni-Sn 금속간화합물과 반응하고 남은 Ni 분말들로 구성되었으며, 접합 온도가 증가함에 따라 접합부 칩 전단강도는 증가하였다. 솔더링 온도와 유사한 270 ℃의 접합 온도에서 30분 동안의 TLPS 접합 공정 수행 후 약 30 MPa의 높은 칩 전단 강도 값을 얻었다.

전자 패키징의 요소기술

윤정원,문원철,정승부,Yoon Jeong-Won,Moon Won-Chul,Jung Seung-Boo 대한용접접합학회 2005 대한용접·접합학회지 Vol.23 No.2

Optoelectronic 패키징을 위한 Au-Sn 플립칩 범핑 기술과 신뢰성

윤정원,김종웅,구자명,노보인,정승부,Yoon, Jeong-Won,Kim, Jong-Woong,Koo, Ja-Myeong,Noh, Bo-In,Jung, Seung-Boo 대한용접접합학회 2008 대한용접·접합학회지 Vol.26 No.1

전자 패키징의 플립칩 본딩 기술과 신뢰성

윤정원,김종웅,구자명,하상수,노보인,문원철,문정훈,정승부,Yoon, Jeong-Won,Kim, Jong-Woong,Koo, Ja-Myeong,Ha, Sang-Su,Noh, Bo-In,Moon, Won-Chul,Moon, Jeong-Hoon,Jung, Seung-Boo 대한용접접합학회 2007 대한용접·접합학회지 Vol.25 No.2

BALB/c 마우스에서 동종 지방유래 기질세포가 창상치유에 미치는 영향

윤정원,임진수,김정남,유결,Yoon, Jeong-Won,Lim, Jin-Soo,Kim, Jung-Nam,Yoo, Gyeol 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.4

Purpose: Adipose-derived stromal cells (ADSCs) are multipotent cells that have been found to promote wound healing through the process of angiogenesis and reepithelialization. Generally, it is well known that the antigenicity of ADSCs doesn't affect stem cell therapy. In this study, we investigated the effect of allogeneic ADSCs in the wound healing process by applying allogeneic ADSCs on the wound healing splint model of mice. Methods: Adipose tissue was harvested from the epididymal fat pads of BALB/c and C57BL/6 mice. Twenty four mice BALB/c were divided into three groups; control, isogeneic, and allogeneic groups. Two full thickness defects with 6 mm diameters were created on the back of BALB/c mice. $1{\times}10^6$ ADSCs from BALB/c mice were applied on the isogeneic group. In the allogeneic group, ADSCs from the C57BL/6 mice were applied. No cells were applied to the control group. The sizes of the wounds were evaluated in 3, 5, 7, 10, and 14 days after the wounds were applied, and tissues were harvested in 7 and 14 days for histological analysis. Results: Wound healing rates had showed significant increase in 10, and 14 days when the isogeneic group was compared to the control group, but the allogeneic group showed significantly decrease compared to the isogeneic group (p<0.05). Histological scores in the isogeneic group were significantly high, but significantly lower in the allogeneic group when compared to the isogeneic group in 2 weeks (p<0.05). In the isogeneic group, thick inflammatory cell infiltration with abundant capillaries were observed in 1 week, and thick epithelium with many large capillaries were observed in 2 weeks. Conclusion: When isogeneic ADSCs were applied to wounds, they presented a faster wound healing rate compared to controls and the allogeneic group. Unlike general stem cell therapy, these findings suggest that cell therapy targeted at enhancing wound healing may benefit from the use of ADSCs with identical antigenicity, as opposed to allogeneic or xenogenic ADSCs.

전기자동차용 고신뢰성 파워모듈 패키징 기술

윤정원,방정환,고용호,유세훈,김준기,이창우,Yoon, Jeong-Won,Bang, Jung-Hwan,Ko, Yong-Ho,Yoo, Se-Hoon,Kim, Jun-Ki,Lee, Chang-Woo 한국마이크로전자및패키징학회 2014 마이크로전자 및 패키징학회지 Vol.21 No.4

The paper gives an overview of the concepts, basic requirements, and trends regarding packaging technologies of power modules in hybrid (HEV) and electric vehicles (EV). Power electronics is gaining more and more importance in the automotive sector due to the slow but steady progress of introducing partially or even fully electric powered vehicles. The demands for power electronic devices and systems are manifold, and concerns besides aspects such as energy efficiency, cooling and costs especially robustness and lifetime issues. Higher operation temperatures and the current density increase of new IGBT (Insulated Gate Bipolar Transistor) generations make it more and more complicated to meet the quality requirements for power electronic modules. Especially the increasing heat dissipation inside the silicon (Si) leads to maximum operation temperatures of nearly $200^{\circ}C$. As a result new packaging technologies are needed to face the demands of power modules in the future. Wide-band gap (WBG) semiconductors such as silicon carbide (SiC) or gallium nitride (GaN) have the potential to considerably enhance the energy efficiency and to reduce the weight of power electronic systems in EVs due to their improved electrical and thermal properties in comparison to Si based solutions. In this paper, we will introduce various package materials, advanced packaging technologies, heat dissipation and thermal management of advanced power modules with extended reliability for EV applications. In addition, SiC and GaN based WBG power modules will be introduced.

중성어혈약침 치료에 대한 임상논문 고찰 - 국내학술지를 중심으로

윤정원,김순중,Yoon, Jeong-Won,Kim, Soon-Joong 한방재활의학과학회 2017 한방재활의학과학회지 Vol.27 No.4

Objectives To review the case studies and controlled studies about Jungsongouhyul pharmacopuncture treatment. Methods We searched 92 studies about Jungsongouhyul pharmacopuncture from 6 Korean web databases, using words 'Jungsongouhyul', 'Jungsongouhyul and pharmacopuncture', 'ouhyulpharmacopuncture' and 'ouhyul and pharmacopuncture' in Korean alphabet. We removed 63 duplicated studies. And we excluded 12 studies by reviewing abstract and the contents of a study. Results We selected 5 case studies and 12 controlled studies, excluding experimental research and study not on humans, not using the Jungsongouhyul pharmacopuncture for major treatment. Jungsongouhyul pharmacopuncture was used mostly in whiplash injury and all studies showed that Jungsongouhyul pharmacopuncture is effective treatment. But we found some lacking parts with study design in most studies. Conclusions We found out that Jungsongouhyul pharmacopuncture is effective in various diseases. But we need to do more well-designed study to increasing reliability of Jungsongouhyul pharmacopuncture treatment.

플라스틱 브라켓의 프라이머 처리가 전단결합강도에 미치는 영향

윤정원(Jeong-Won Yoon),임호남(Ho-Nam Lim) 대한치과재료학회 2002 대한치과재료학회지 Vol.29 No.1

감자粉末의 脂肪質組成과 貯藏中의 變化에 關한 硏究

尹廷洹(Jeong-won Yoon),洪凡植(Bum-shik Hong),梁漢喆(Han-chul Yang),金東勳(Dong-hoon Kim) 한국식품과학회 1978 한국식품과학회지 Vol.10 No.3

퀘이형제의 애니메이션 〈Stille Nacht: Dramolet für RW in Herisau〉의 작품분석 –연출의 시각적 특성을 중심으로-

윤정원(Yoon Jeong-won) 한국만화애니메이션학회 2021 만화애니메이션연구 Vol.- No.65

본 연구는 독특한 영상 연출과 난해한 내러티브로 애니메이터로서는 독보적인 위치를 차지하고 있는 퀘이형제의 애니메이션 작품 중 〈고요한 밤: 해리사우의 로베르트 발저를 위한 미니 드라마〉(Still Nacht: Dramolet für RW in Herisau)의 시각적 요소들을 분석하여 퀘이형제의 연출의 시각적 특성에 대해 알아보고자 한다. 본론에서는 먼저 해당 영상의 스토리라인에 대해 알아본다. 퀘이형제의 작업방식은 자신들의 미의식의 토대 위에 직관에 따라 영상의 방향을 결정하기 때문에 그들의 영상이 명료하지 않은 내러티브 구조를 가지고 있음을 전제로 영상을 통해 드러나는 피상적인 내용에 대해 서술한다. 다음으로 영상을 구성하고 있는 시각적 요소들을 퍼펫, 물체, 배경, 애니메이트, 카메라워크와 편집기법으로 나누어 각각의 요소에 대한 분석을 한다. 퀘이형제의 영상연출은 아상블라주 기법으로 제작된 인간형 퍼펫의 비정상적인 비율과 구조에서 벗어난 외형에 기인한 애니메이트의 언캐니, 그리고 일상 사물들의 신경증적인 떨림이 주는 불안함 등은 퀘이형제의 영상 전반에 퍼져있는 그로테스크한 분위기를 배가시키는 역할을 하고 있다. 이를 근거로 그들의 아상블라주 인형이 그로테스크한 아름다움을 표현하기 위한 시각적 전략임을 확인한다. 〈고요한 밤〉(Stille Nacht)에 등장하는 일상 사물(자석, 금속 가루, 숟가락)이 운동성의 자율과 비자율의 충돌, 사물 고유의 기능과 영상내 역할 간의 의미충돌을 야기하며 다중적인 관점과 난해함을 증가시키는 전략으로 활용되고 있음을 논한다. 또한 영상의 무대를 뒤덮은 금속 가루는 메레 오펜하임의 작품을 연상케 하여 이것이 초현실주의적 표현의 연장선에 있는 의미생성의 방법임을 밝힌다. 마지막으로 퀘이형제가 매크로 촬영과 핀홀 트랜지션 & 비네팅과 같은 화면편집 효과를 사용함으로써 관객의 시선이 은밀함을 갖도록 만들고, 이러한 촬영과 편집기법이 결과적으로 관객들을 관능적 시선의 참여자로 만드는 장치라는 점을 밝힌다. 퀘이형제의 작품은 비인과적이고 해체적인 난해한 내러티브로 악명높다. 그러나 그들의 작품에 사용되는 시각적 요소들은 내러티브의 비인과적 특성과는 별개로, 날카로운 직관과 예술적 선택을 거치며 매우 정교하게 관계지어짐으로써 그들이 추구하는 영상미가 최종적으로 구축되는 것임을 본 연구를 통해 확인할 수 있었다. This study is about the visual effects of 〈Still Nacht: Dramolet für RW in Herisau〉 among the animation works of the Quay brothers, who occupy a unique position as animators with their unique video directing and esoteric narrative. By analyzing the elements, we are going to investigate the visual characteristics of Quay Brothers’ directing. In this article, we will first look at the storyline of the animated film. The Quay brothers’ work method has a narrative structure in which their images are not clear because they determine the direction of the images based on their intuition based on their aesthetic consciousness rather than focusing on storytelling based on the probability or causality of the story. On the premise of this, the superficial contents revealed through the video are described. Next, the visual elements composing the video are divided into puppets, objects, backgrounds, animations, camera work, and editorial methods to analyze each element. The meaning of discomfort or fear can be found in the anti-aesthetic value of modern art mentioned in Adorno’s aesthetics in the video directing of the Quay brothers. The uncanny of the animation method and the anxiety of the repetitive trembling of everyday objects are playing a role in multiplying the grotesque atmosphere that pervades the entire video of the Quay Brothers. Based on this, it is confirmed that the assemblage-style bisque dolls they produce are a visual strategy for grotesque beauty. Animating the characters in 〈Stille Nacht〉 or expressing the material characteristics of everyday objects is a general direction without anything special, but it expands into a new meaning by combining with other elements, while the magnets used in the work, It is argued that metal powder and spoons are a strategy to multiply multiple viewpoints and difficulties by causing collisions of autonomy and non-autonomy of movement, collisions of inherent functions and meanings in images, etc. The old room, which is the main stage of the video, and the metal powder covering the entire room are reminiscent of the works of Meret Oppenheim, revealing that this is a method of meaning creation that is an extension of surrealistic expression. Finally, it is revealed that the Quay brothers use macro shooting and screen editing effects such as transitions and vignetting to add a sense of secrecy to the audience’s gaze, and reveals that these shooting and editing methods are strategies that ultimately make the audience into sensual audiences. The Quay brothers’ works are notorious for their esoteric narratives that are non-causal and deconstructive. However, it can be confirmed through this study that the visual elements used in their works are ultimately established as the visual beauty they seek, as they are closely related through sharp intuition and artistic selection, apart from the non-causal characteristics of the narrative.