Joule heat welding of thin wires to thin films

Tohmyoh, Hironori; Fujimori, Masato

doi:10.1299/mej.2014smm0010

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…Welding the end of one thin wire to the side of another to create complex wire structures by repeatedly carrying out the welding process has also been done. 27) Moreover, Joule heat welding of thin wires with different thicknesses, 28) and that of wires to substrates 29) have also been reported. To expand the applicability of the Joule heat welding technique, not only welding similar metals, but also welding dissimilar metal materials is very much demanded.…”

Section: Introductionmentioning

confidence: 95%

Welding dissimilar metal microwires by Joule heating

Sunagawa¹,

Tohmyoh²

2015

Jpn. J. Appl. Phys.

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In this paper we report on the Joule heat welding of dissimilar metal microwires. The current required for successful welding was investigated. Various combinations of 25 µm diameter Cu, Au and Al microwires were welded together using this technique. The welded dissimilar metal wire systems were then cut by supplying a higher current, and it was found that the position at which the wires cut was not at the midpoint, i.e., the position of the weld, of the wire system. This is because the temperature distributions formed in the dissimilar metal systems were asymmetrical. The positions at which the wires cut were in good agreement with those predicted by a heat conduction model. The lower limit for successful welding of the dissimilar metal microwire system was found to be determined by the lower of the two currents required to cut microwires of the individual materials.

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Section: Introductionmentioning

confidence: 95%

Welding dissimilar metal microwires by Joule heating

Sunagawa¹,

Tohmyoh²

2015

Jpn. J. Appl. Phys.

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“…It has been reported that thin Pt wires are welded together in self-completed matter under the supply of constant direct current (Tohmyoh and Fukui, 2009). Tip of a thin wire was welded to the side of another thin wire (Fukui and Tohmyoh, 2011) or the surface of the substrate (Tohmyoh and Fujimori, 2014). Thin wires having dissimilar diameter (Fujimori and Tohmyoh, 2013) and dissimilar metal wires were also welded together by Joule heating (Tohmyoh and Sunagawa, 2015).…”

Section: Introductionmentioning

confidence: 99%

Thermal boundary conditions around thin Pt wires under the current supply and its application for Joule heat welding of wires having various diameters

Tohmyoh

Yamaguchi

2019

Mechanical Engineering Journal

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This paper treats the Joule heat welding of thin Pt wires having various diameters. Joining of fine-scale materials, such as micro-or nanowires, has been essential to create advanced materials systems. Joule heat welding is one of the suitable way for this purpose. It has been reported that thin wires were welded together under the supply of constant direct current, and the welding condition was sensitive to the thermal boundary conditions around the wires under the current supply, which was affected by the heat transfer from the wire surface to the ambient and the heat conduction at the ends for the current supply. The diameters of thin Pt wires were 0.8-20 m, and the current required to cut the wire by Joule heating was investigated. The temperature of the wire having the smaller diameter was easily increased by Joule heating, and this became remarkable with increasing the slenderness ratio, i.e., the ratio of the diameter to the length for current supply. An index related to the temperature of the wire under the current supply was introduced to describe the thermal boundary conditions around the wire. The behavior of the index against the diameter was approximated by the exponential functions, and the thermal boundary conditions around the wires having various diameters became predictable. Finally, the validity of the thermal boundary conditions determined and predicted in this study was verified by conducting the experiments to cut and weld the wires by Joule heating.

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“…The study has reported surface plasmon propagation along a single metal nanowire (Ditlbacher et al 2005;Ye et al 2015). Micro/nanoscale systems using micro/nanowires are assembled by organizing and welding wires with each other (Whang et al 2003;Garnett et al 2012;Tohmyoh and Fujimori 2014). These micro/nanoscale systems are created due to the development of various growth methods such as the electrodeposition growth method (Motoyama et al 2005), the template growth method (Cao and Liu 2008;Yao et al 2011), and chemical synthesis (Schmädicke et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Loss in discharging atoms through artificial hole for fabricating metallic micro/nanowire by electromigration

Kimura

2019

Mechanical Engineering Journal

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The electromigration (EM) technique is a method that is used to ensure the physical growth of metallic micro/nanowires. In the EM technique, the atomic diffusion of metals is intentionally accelerated by controlling the input current and heating the substrate, thus forming a hillock owing to the accumulation of atoms, which is transformed into small-diameter metallic micro/nanowires. The metallic micro/nanowires can be fabricated by discharging the atoms through a hole, which is artificially introduced in the passivation. The fabrication of metallic micro/nanowires has been successfully demonstrated using the EM technique, and the wire growth behavior is dependent on the characteristics of the artificial hole. However, very little information is available about the quantitative assessment of wire fabrication performance even though several experimental attempts have been conducted in prior studies. Additionally, the effect of structural parameters, such as the hole size, on the fabrication performance has not yet been adequately investigated. This study quantitatively evaluates the fabrication performance that is influenced by the hole size in terms of the growth rate of wires and threshold current used for fabrication. Based on the experimental results, the fabrication loss related to the hole size is experimentally revealed; further, an empirical formula for the fabrication loss has been developed. The optimal hole size to achieve the high performance of the micro/nanowire growth using the EM technique can be obtained with this finding.

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Joule heat welding of thin wires to thin films

Cited by 3 publications

References 23 publications

Welding dissimilar metal microwires by Joule heating

Welding dissimilar metal microwires by Joule heating

Thermal boundary conditions around thin Pt wires under the current supply and its application for Joule heat welding of wires having various diameters

Loss in discharging atoms through artificial hole for fabricating metallic micro/nanowire by electromigration

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