• Proceedings of the Korean Vacuum Society Conference
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• 2009.08a
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• pp.367-367
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• 2009

• Proceedings of the Korean Nuclear Society Conference
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• 2003.10a
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• pp.113-113
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• 2003

• Journal of the Korean Ceramic Society
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• v.40 no.10
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• pp.967-972
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• 2003

The inner-diameter 5 cm cold hollow cathode ion source was designed for the high current density and the homogeneous beam profile of ion beam. The ion source consisted of a cylindrical cathode, a generation part of magnetic field, a plasma chamber, convex type ion optic system with two grid electrode, and DC power supply system. The cold hollow cathode ion sources were classified into standard type (I), electron output electrode modified type (II). The operation of the ion source was done with discharge current, ion beam potential and argon gas flow rate. The modification of electron output electrode resulted in uniform plasma generation and uniform area of ion beam was extended from 5 cm to 20 cm. Improved ion source was evaluated with beam uniformity, ion current, team extraction efficiency, and ionization efficiency.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.6 no.3
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• pp.26-35
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• 1997

In this study, the drawing characteristics of circular drawbead are examined with the plane strain elastic-plastic FE Method. Both the clamping load and the drawing load investigated by varying the process variables such as drawbead radius, closing depth and friction condition. The effective strain induced by the draw bead is also investigated. In order to verify the results, the computed results are compared with the existing experimental results. It has been found that both the clamping load and drawing loads are related with the geometry of the bead rather than the lubrication conditions.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2011.05a
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• pp.192-192
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• 2011

본 연구에서는 LED lead frame을 위한 Sn-3.5Ag 솔더의 젖음 특성과 반사율에 관하여 조사하였다. 금속기판과 액체금속간의 젖음성은 wetting balance tester를 이용하여 평가하였으며, 최대인출력, 최대인출시간 등을 측정하고 표면장력을 계산하였다. Sn-3.5Ag 솔더를 $250{\sim}290^{\circ}C$의 온도에서 젖음성을 측정하였는데 온도가 증가함에 따라 젖음성이 향상되는 것을 확인할 수 있었다. 또한 솔더가 도금된 Cu-coupon의 반사율을 측정하였는데 $270^{\circ}C$에서 가장 높은 반사율을 나타냈다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.595-596
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• 2013

• 대한방사선방어학회:학술대회논문집
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• 2011.04a
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• pp.104-105
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• 2011

• Proceedings of the Korean Nuclear Society Conference
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• 1999.05a
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• pp.289-289
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• 1999

• Proceedings of the CALSEC Conference
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• 2001.02a
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• pp.83-96
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• 2001

정의 : 무기체계의 설계/개발 특성을 식별, 문서화(규격서, 도면 등)하고, 기술발전에 따라 성능개량을 추진하는 제반 기술정보를 기록 및 유지하는 활동 ㆍ 최적의 순기비용으로 장비요구 성능충족(ROC 만족) ㆍ 계약업무 일관성 도모 및 경쟁입찰에 의한 획득 ㆍ 표준화 및 통일성(중략)

• Proceedings of the Korean Vacuum Society Conference
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• 2008.08a
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• pp.194-194
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• 2008