• Proceedings of the KWS Conference
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• 1998.05a
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• pp.253-256
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• 1998

• Proceedings of the KWS Conference
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• 1999.05a
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• pp.156-160
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• 1999

• Journal of Welding and Joining
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• v.16 no.2
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• pp.21-28
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• 1998

• Journal of Welding and Joining
• /
• v.16 no.2
• /
• pp.1-6
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• 1998

• Journal of Welding and Joining
• /
• v.16 no.2
• /
• pp.14-20
• /
• 1998

• Proceedings of the KWS Conference
• /
• 1995.04a
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• pp.68-70
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• 1995

• Proceedings of the KWS Conference
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• 2001.10a
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• pp.19-22
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• 2001

• Proceedings of the Korean Society Of Semiconductor Equipment Technology
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• 2004.05a
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• pp.154-158
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• 2004

Power inductor is usually used in the field of the power circuit of a cellular phone, TFT LCD module etc.. This paper presents the development process of Power Inductor Full Automation Winding/Welding System for TFT LCD. This process, the process algorithm, high precision welding current control, design of welding head, high speed, high precision feeding mechanism, and user interface process control program technologies are included.

• Proceedings of the KIEE Conference
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• 1995.11a
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• pp.552-554
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• 1995

In long-haul high speed optical communications, the distance between a transmitter and a receiver depends on the amount of light coupled to a single mode optical fiber from the laser diode(LD) as well as the LD characteristic itself. And the transmitter module must have long lifetime. high reliability, and even simple structure. Such points have induced laser welding technique to be a first choice in opto-electronic module packaging because it can provide strong weld joint in a short time with very small coupling loss. In this paper, packaging considerations and characteristics for high speed LD modules are discussed. They include optical path design factors for larger aligning tolerance, and novel laser welding processes for component assembly. For low coupling loss after laser welding processes, the optical path for optimum coupling of a single mode optical fiber into the LD chip was designed with the GRIN lens system providing sufficiently large aligning tolerance both in the radial and axial directions. The measured sensitivity of the LD module was better than -33.7dBm(back to back) at a BER of $10^{-10}$ with a 2.5Gbps NRZ $2^{23}-1$ PRBS.

• Proceedings of the KSME Conference
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• 2003.04a
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• pp.1159-1165
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• 2003

The Nd:YAG laser process is known to have high speed and deep penetration capability to become one of the most advanced welding technologies. In spite of its good mechanical characteristics, SM45C carbon steel has a high carbon contents and suffers a limitation in the industrial application due to the poor welding properties. The major process parameters studied in the present laser welding experiment were position of focus, travel speed and laser power.