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인쇄회로기판상의 금속 배선을 위한 구리 도금막 형성 : 무전해 중성공정
조양래,이연승,나사균,Cho, Yang-Rae,Lee, Youn-Seoung,Rha, Sa-Kyun 한국재료학회 2013 한국재료학회지 Vol.23 No.11
We investigated the characteristics of electroless plated Cu films on screen printed Ag/Anodized Al substrate. Cu plating was attempted using neutral electroless plating processes to minimize damage of the anodized Al substrate; this method used sodium hypophosphite instead of formaldehyde as a reducing agent. The basic electroless solution consisted of $CuSO_4{\cdot}5H_2O$ as the main metal source, $NaH_2PO_2{\cdot}H_2O$ as the reducing agent, $C_6H_5Na_3O_7{\cdot}2H_2O$ and $NH_4Cl$ as the complex agents, and $NiSO_4{\cdot}6H_2O$ as the catalyser for the oxidation of the reducing agent, dissolved in deionized water. The pH of the Cu plating solutions was adjusted using $NH_4OH$. According to the variation of pH in the range of 6.5~8, the electroless plated Cu films were coated on screen printed Ag pattern/anodized Al/Al at $70^{\circ}C$. We investigated the surface morphology change of the Cu films using FE-SEM (Field Emission Scanning Electron Microscopy). The chemical composition of the Cu film was determined using XPS (X-ray Photoelectron Spectroscopy). The crystal structures of the Cu films were investigated using XRD (X-ray Diffraction). Using electroless plating at pH 7, the structures of the plated Cu-rich films were typical fcc-Cu; however, a slight Ni component was co-deposited. Finally, we found that the formation of Cu film plated selectively on PCB without any lithography is possible using a neutral electroless plating process.
신문매체에 나타난 한국 남성복 변천에 관한 연구 : 1988년부터 1997년 까지
趙亮來,羅秀任 服飾文化學會 1999 服飾文化硏究 Vol.7 No.5
This research, as a study of the documentary records, examined the process of men's wear development year by year, looking into the newspapers which show objectively social phenomena in those days. The outcomes thereform were classified according to the important factors of dress and ornaments' modeling i. e. style, color, pattern, material, ornamentation method. And then, the process of men's wear transition was analyzed based on the aforesaid examination with its classification. The above analyses revealed that a transition of a dress and ornaments closely correlates with a social and cultural change and also meant that the dress and ornaments symbolizes the social phenomena in those days. Thanks to the holding of Seoul Olympic Games in 1988, Korean society had tremendously grown with rapid changes in its politics, economy and culture. Also, men's wear type became innovative, breaking from the existing orthodox one due to the transition of men's viewpoints on value and their lives's style.