Bonding metal members with multiple laser beams

Details Bonding metal members with multiple laser beams Bonding metal members with multiple laser beams

1992-01-17

1993-12-21

Albritton, C. L.

Electric heating

Metal heating

By arc

21912164, 21912176, 21912177, B23K 2600

Patent

active

052723097

ABSTRACT:
A first laser beam and a second laser beam with a longer wavelength than the first laser beam are directed at a first metal member in contact with a second metal member. At the ambient temperature the first member has high absorption of energy from the first laser beam but low absorption of energy from the second laser beam. As the first member absorbs energy from the first laser beam the temperature of the first member increases and the reflectivity of the first member decreases so that the first member has high absorption of energy from the second laser beam. The first member then absorbs energy from the second laser beam, the temperature of the first member further increases and at least one of the members melts. After discontinuing the laser beams a solid bond forms between the members.

REFERENCES:
patent: 4879449 (1989-11-01), Duley et al.
patent: 5168454 (1992-12-01), LaPlante et al.
"Europeans Focus On Copper Vapor Lasers," Photonics Spectra, Jan. 1992, p. 71.

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