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Surface modification of resin substrate by UV treatment for printed circuit board
Kunihito BABA,Yoshiyuki NISHIMURA,Mitsuhiro WATANABE,Hideo HONMA 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11
In recent years, with the miniaturization of electric devices, the demand for flexible printed circuits (FPC) using polyimide has increased, because of its excellent heat resistance and size stability. Polyimide also has good flexibility and surface smoothness. However, polyimide has a tendency of having high moisture absorption as well as high gas permeability. On the other hand, Cyclo Olefin Polymer (COP) has low moisture absorption, excellent size stability and excellent high frequency electrical properties. Therefore, the COP is attractive as a substrate of FPC. However, it is difficult to form metal film using electroless plating on the COP by conventional processes. We confirmed that a copper film can be formed with high adhesion strength while maintaining a smooth resin surface using surface modification by the UV irradiation. Surface modification by UV irradiation was effective to achieve good adhesion (about 1.0 kN/m) between the COP resin and the deposited metal without roughing the COP surface. An interface electric conductivity of the printed circuit on COP produce by this method indicated a value of 80% approximately until 30 ㎓ area.
Symposium: “Oncology Leadership in Asia”
노동영,노재경,김열홍,Kazuhiro Yoshida,Hideo Baba,Marie Cherry Lynn Samson-Fernando,Sanjeev Misra,Zeba Aziz,Rainy Umbas,Yogendra P. Singh,Tony Shu Kam Mok,양한광,Hideyuki Akaza 대한암학회 2017 Cancer Research and Treatment Vol.49 No.2
The symposium on “Oncology Leadership in Asia” was held as part of the official program of the 42nd Annual Meeting of the Korean Cancer Association with International Cancer Conference. Given the increasing incidence of cancer in all countries and regions of Asia, regardless of developmental stage, and also in light of the recognized need for Asian countries to enhance collaboration in cancer prevention, research, treatment and follow-up, the symposium was held with the aim of bringing together oncology specialists from eight countries and regions in Asia to present the status in their own national context and discuss the key challenges and requirements in order to establish a greater Asian presence in the area of cancer control and research. The task of bringing together diverse countries and regions is made all the more urgent in that while Asia now accounts for more than half of all new cancer cases globally, clinical guidelines are based predominantly on practices adopted in Western countries, which may not be optimized for unique ethnic, pharmacogenomic and cultural characteristics in Asia. Recognizing the need for Asia to better gather information and data for the compilation of Asia-specific clinical guidelines, the participants discussed the current status in Asia in the national and regional contexts and identified future steps towards integrated and collaborative initiatives in Asia. A key outcome of the symposium was a proposal to combine and integrate the activities of existing pan-Asian societies, including the Asian Pacific Federation of Organizations for Cancer Research and Control (APFOCC) and Asian Clinical Oncology Society (ACOS). Further proposals included the expansion of pan-Asian society membership to include individuals and the essential need to encourage the participation of young researchers in order to ensure self-sustainability of cancer control efforts in the future.