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  2. Crimp (joining) - Wikipedia

    en.wikipedia.org/wiki/Crimp_(joining)

    An electrical crimp is a type of solderless electrical connection which uses physical pressure to join the contacts. Crimp connectors are typically used to terminate stranded wire. [ 4 ] Stripped wire is inserted through the correctly sized opening of the connector, and a crimper is used to tightly squeeze the opening against the wire.

  3. Soldering - Wikipedia

    en.wikipedia.org/wiki/Soldering

    A soldering gun heats a small cross-section copper tip very quickly by conducting a large AC current through it using a large cross-section one-turn transformer; the copper tip then conducts the heat to the part like other soldering irons. A soldering gun will be larger and heavier than a heating-element soldering iron of the same power rating ...

  4. Solder - Wikipedia

    en.wikipedia.org/wiki/Solder

    Gold and palladium readily dissolve in solders. Copper and nickel tend to form intermetallic layers during normal soldering profiles. Indium forms intermetallics as well. Indium-gold intermetallics are brittle and occupy about 4 times more volume than the original gold. Bonding wires are especially susceptible to indium attack.

  5. Organocopper chemistry - Wikipedia

    en.wikipedia.org/wiki/Organocopper_chemistry

    In addition the four copper atoms form a planar Cu 4 ring based on three-center two-electron bonds. The copper to copper bond length is 242 pm compared to 256 pm in bulk copper. In pentamesitylpentacopper a 5-membered copper ring is formed, similar to (2,4,6-trimethylphenyl)gold, and pentafluorophenylcopper is a tetramer. [9]

  6. Thermocompression bonding - Wikipedia

    en.wikipedia.org/wiki/Thermocompression_bonding

    The most established materials for thermocompression bonding are copper (Cu), gold (Au) and aluminium (Al) [1] because of their high diffusion rates. [4] In addition, aluminium and copper are relatively soft metals with good ductility. Bonding with Al or Cu requires temperatures ≥ 400 °C to ensure sufficient hermetical sealing.

  7. Metallic bonding - Wikipedia

    en.wikipedia.org/wiki/Metallic_bonding

    Otherwise, metallic bonding can be very strong, even in molten metals, such as gallium. Even though gallium will melt from the heat of one's hand just above room temperature, its boiling point is not far from that of copper. Molten gallium is, therefore, a very nonvolatile liquid, thanks to its strong metallic bonding.

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