Search Results - "Leung, Chi H."

Electrostatically actuated copper-blade microrelays by Lee, Han-Sheng, Leung, Chi H., Shi, Jenny, Chang, Shih-Chia

“…Electrostatically actuated microrelays have been fabricated. The structural material, copper, is electroformed onto patterned areas. The typical dimensions of…”
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Integrated microrelays: concept and initial results by Han-Sheng Lee, Leung, C.H., Shi, J., Shih-Chia Chang, Lorincz, S., Nedelescu, L.

“…The addition of an arc suppression circuit to a microrelay (made by micromachining technology) minimizes arcing during switching and results in an increase in…”
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Improved adhesion of diamondlike coatings using shallow carbon implantation by Malaczynski, Gerard W., Elmoursi, Alaa A., Leung, Chi H., Hamdi, Aboud H., Campbell, Albert B.

“…A surface layer of metal carbides provides an excellent interface to achieve a highly adherent diamondlike carbon (DLC) coating. A plasma immersion ion…”
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Weibull Analysis of Switching Contact Resistance in Laboratory and Commercial Circuit Breakers by Leung, C.H., Streicher, E., Fitzgerald, D.

“…Silver/tungsten powder metal electric contacts are used in circuit breakers because of their combination of high conductivity from silver, and high melting…”
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Study of Arc Mobility and Reignition in a Static Gap Discharge with Magnetic Field by Leung, C H, Harman, D, Doublet, L, Bourda, C

“…Arc mobility on contact surface is an important factor in contact erosion and circuit interruption. The two stages of arc mobility are the initial immobile arc…”
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Thermal modeling of electrical contacts in switches and relays by Leung, C.H., Lee, A., Bor-Jenq Wang

“…A thermal modeling procedure has been developed to calculate the temperature distribution of components in complex three-dimensional (3-D) switches and relays…”
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Surface enhancement by shallow carbon implantation for improved adhesion of diamond-like coatings by Malaczynski, Gerard W., Elmoursi, Alaa A., Leung, Chi H., Hamdi, Aboud H., Campbell, Albert B.

“…A surface layer of metal carbides provides an excellent interface to achieve a highly adherent diamond-like carbon (DLC) coating. A plasma immersion ion…”
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Thermal cycling induced wiping wear of connector contacts at 150°C by Leung, C.H., Lee, A.

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Characterization of surface modified α-iron by nitrogen plasma immersion ion implantation: a microstructural study by Malaczynski, Gerard W., Leung, Chi H., Elmoursi, Alaa A., Hamdi, Aboud H., Campbell, Albert B., Balogh, Michael P., Militello, Maria C., Simko, Steven J., Waldo, Richard A.

“…This paper discusses the morphology of pure iron surfaces modified by nitrogen plasma immersion ion implantation and compares them to similar surfaces treated…”
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Micro-electro-mechanical relays-design concepts and process demonstrations by Lee, H.S., Leung, C.H., Shi, J., Shih-Chia Chang

“…MEMS relays designed for automotive applications were investigated and various fabrication techniques reviewed. Several micro-relay structures, of…”
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The development of silver-based cadmium-free contact materials by Wingert, P.C., Leung, C.H.

“…A procedure is described that allows contact material compositions to be developed by a systematic progression through several levels of component evaluations…”
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Contact erosion in automotive DC relays by Leung, C.H., Lee, A.

“…Contact degradation of automotive relays was studied to understand the relationships between switching operations (make, break, and make-and-break) and loads…”
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Electric contact materials and their erosion in automotive DC relays by Leung, C.H., Lee, A.

“…Proper contact material selection is critical for reliable performance of automotive relays. Three types of contact material were compared in a 20-A relay,…”
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