• Title/Summary/Keyword: Microwelding

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Suppression of Microwelding on RF MEMS Direct Contact Switches (직접접촉식 RF MEMS 스위치에서의 미소용접 현상 억제)

  • Lee, Tae-Won;Kim, Seong-Jun;Park, Sang-Hyun;Lee, Ho-Young;Kim, Yong-Hyup
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.33 no.4
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    • pp.41-46
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    • 2005
  • In this paper, a new method for suppressing microwelding on the RF MEMS (Radio Frequency Microelectromechanical System) direct contact switches is introduced. Two kinds of refractory metals, tungsten and molybdenum were coated onto the contact point of the switches and the effect of the coating was examined. The changes in insertion loss and isolation at the switch were measured by using network analyzer and power loss was evaluated by power measurement. The results revealed that while tungsten and molybdenum showed higher contact resistance than gold in low input power range, they enhanced the power handling capability and reliability of the switches in high input power region.

LASER MICROWELDING FOR ELECTRICAL INTERCONNECTION IN BIOMEDICAL TECHNOLOGY (의료용 전기 접점부의 마이크로 레이저 용접)

  • ;B.K. Paul;J. Boogaard
    • Proceedings of the KWS Conference
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    • 2003.11a
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    • pp.45-48
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    • 2003
  • Over the past few decades, there has been increasing research and commercial activity in invasive and non-invasive biomedical technology. One important challenge to developing these devices involves the increasing density of electrical interconnects. Resistance spot welding is limited in the density of interconnect based on either the size of welding head or the positional precision with which a weld can be made. Development of an automated laser microwelding system would permit the continued advancement of these important biomedical technologies. The objective of this work is to demonstrate the application of pseudo-pulse Nd:YAG laser technology as an alternative to resistance spot welding in performing electrical interconnection within biomedical products. To date, some experiments have been conducted by using a pseudo-pulse 1064 nm Nd:YAG laser, a successful weld of a 25 ${\mu}{\textrm}{m}$ diameter Pt/Ir wire to a 316 stainless steel shim can be made. Another application involves welding clips, which may be used for external interconnection, to electrodeposited nickel domes that make particular interconnections to specific insulated wires within a cable. These results show a great deal of promise for developing such a process.

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