<i>The Polite Marriage</i>. J. M. S. Tompkins

McKillop, Alan D.

doi:10.1086/388430

Cited by 2 publications

(2 citation statements)

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“…For MEMS direct current (DC) switch contacts with metallic contacts, previously reported failure mechanisms include adhesion, melting/shorting, and growth in contact resistance (R) [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Bimetallic nanoparticles for surface modification and lubrication of MEMS switch contacts

et al. 2008

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Reliability continues to be a critical issue in microelectromechanical systems (MEMS) switches. Failure mechanisms include high contact resistance (R), high adhesion, melting/shorting, and contact erosion. Little previous work has addressed the lubrication of MEMS switches. In this study, bimetallic nanoparticles (NPs) are synthesized using a biotemplated approach and deposited on Au MEMS switch contacts as a nanoparticle-based lubricant. Bimetallic nanoparticles are comprised of a metallic core (∼10 nm diameter gold nanoparticle) with smaller metallic nanoparticles (∼2-3 nm diameter Pd nanoparticles) populating the core surface. Adhesion and resistance (R) were measured during hot switching experiments at low (10 µA) and high (1 mA) current. The Au/Pd NP coated contacts led to reduced adhesion as compared to pure Au contacts with a compromise of slightly higher R. For switches held in the closed position at low current, R gradually decreased over tens of seconds due to increased van der Waals force and growth of the real area of contact with temporal effects being dominant over load effects. Contact behavior transitioned from 'Pd-like' to 'Au-like' during low current cycling experiments. Melting at high current resulted in rapid formation of large real contact area, low and stable R, and minimal effect of load on R. Durability at high current was excellent with no failure through 10(6) hot switching cycles. Improvement at high current is due to controlled nanoscale surface roughness that spreads current through multiple nanocontacts, which restricts the size of melting regions and causes termination of nanowire growth (prevents shorting) during contact opening. Based on these results, bimetallic NPs show excellent potential as surface modifiers/lubricants for MEMS switch contacts.

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Section: Introductionmentioning

confidence: 99%

Bimetallic nanoparticles for surface modification and lubrication of MEMS switch contacts

et al. 2008

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“…The mercuration reaction of aromatic compounds with mercury(I1) acetate or mercury(I1) trifluoroacetate is well known ( 2 , 3 ) . Direct thaIlation of arenes with thallium(II1) trifluoroacetate yielded arylthallium bis(trif1uoroacetates) which were found to be useful intermediates in the synthesis of a range of compounds (4,5). Recently also the plumbylation of aromatic compounds leading to aryllead tricarboxylates has been described ( 6 -8 ) .…”

Section: Introductionmentioning

confidence: 99%