http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
논문 : 기계적 성질 ; 경질박막소재의 계면접합력 평가를 위한 압입자 이동시험의 미세역학적 분석
박해석 ( Hae Seok Park ),서룡운 ( Yong Woon Seo ),권동일 ( Dong Il Kwon ) 대한금속재료학회 ( 구 대한금속학회 ) 1996 대한금속·재료학회지 Vol.34 No.11
The critical loads in scratch test are used for the comparison of adhesion in film/substrate systems. But the critical loads are strongly affected by various parameters such as scratching speed, indenter tip radius and film thickness. Therefore, to assess the reliable interfacial adhesion strength, the stress generated by sliding circular indenter was analyzed by considering the static indentation stress, frictional stress and residual stress. Static indentation stress consists of the elastic stress and blister stress generated by plastic deformation of substrate. On the basis of the stress analysis, the elastic deformation energy of film was evaluated under the condition of strain matching criterion at the interface. When the elastic deformation energy stored in film reaches the critical value, this energy will be released by delamination and spallation of film. Thus the interfacial adhesion strength in terms of work of adhesion can be evaluated by extracting the surface energy generated by spallation from the elastic deformation energy. The work of adhesions of PECVO-prepared DLC film on WC-Co substrate were evaluated. In spite of the distinctly different critical loads measured with the change of scratching speed and film thickness, the comparatively constant work of adhesions were obtained.
Tumor Necrosis Factor-α 억제제(Etanercept)로 호전된 Pustulotic Arthro-osteitis
박해석 ( Hae Seok Park ),김종훈 ( Jong Hoon Kim ),김혜원 ( Hye Won Kim ),김수찬 ( Soo-chan Kim ) 대한피부과학회 2019 大韓皮膚科學會誌 Vol.57 No.7
Pustulotic arthro-osteitis (PAO) is a rare chronic inflammatory disorder characterized by inflammatory osteitis of the sternoclavicular joint and palmoplantar pustulosis. Here, we report a case of PAO that was successfully treated with a TNF-α inhibitor. A 45-year-old man presented with a 3-month history of pustular eruption on the palms and soles. Physical examination showed multiple erythematous papulopustules on the palms, back, and left shin, accompanied by sternoclavicular joint swelling and tenderness. Skin biopsy showed intraepidermal pustules filled with neutrophils on the palm. Bone scintigraphy revealed increased uptake in the bilateral sternoclavicular and other axial joints. Based on these findings, we made the diagnosis of PAO. Even after 6-month treatment of oral steroids and cyclosporine, skin manifestations insufficiently improved, so etanercept therapy was started. Complete clearance of skin lesions and joint pain were achieved after 3 months of etanercept therapy. (Korean J Dermatol 2019;57(7): 378∼382)
Wafer Level Package Using Glass Cap and Wafer with Groove-Shaped Via
李周浩(Jooho Lee),朴海錫(Hae-Seok Park),申濟湜(Jeasik Shin),權鍾午(Jongoh Kwon),李相勳(Sanghun Lee),愼廣縡(KwangJae Shin),宋寅相(Insang Song) 대한전기학회 2007 전기학회논문지 Vol.56 No.12
In this paper, we propose a new wafer level package (WLP) for the RF MEMS applications. The Film Bulk Acoustic Resonator (FBAR) are fabricated and hermetically packaged in a new wafer level packaging process. With the use of Au-Sri eutectic bonding method, we bonded glass cap and FBAR device wafer which has groove-shaped via formed in the backside. The device wafer includes a electrical bonding pad and groove-shaped via for connecting to the external bonding pad on the device wafer backside and a peripheral pad placed around the perimeter of the device for bonding the glass wafer and device wafer. The glass cap prevents the device from being exposed and ensures excellent mechanical and environmental protection. The frequency characteristics show that the change of bandwidth and frequency shift before and after bonding is less than 0.5 ㎒. Two packaged devices, Tx and Rx filters, are attached to a printed circuit board, wire bonded, and encapsulated in plastic to form the duplexer. We have designed and built a low-cost, high performance, duplexer based on the FBARs and presented the results of performance and reliability test.