Bonding metal electrical members with a frequency doubled pulsed

Details Bonding metal electrical members with a frequency doubled pulsed Bonding metal electrical members with a frequency doubled pulsed

1990-08-01

1992-01-21

Albritton, C. L.

Electric heating

Metal heating

By arc

21912163, 372 22, B23K 2600

Patent

active

050830074

ABSTRACT:
Metal electrical members bonded by coupling to at least one member a frequency doubled pulsed Nd:YAG laser comprising 533 and 1064 nm wavelengths is described. Frequency doubling is accomplished by directing a 1064 nm wavelength pulsed Nd:YAG laser at an intracavity nonlinear crystal such as potassium titanyl phosphate between a highly reflective mirror and a partially reflective mirror to produce frequency doubling. An infrared reflector outside the cavity can reduce the 1064 nm wavelength thereby increasing the percentage of 533 nm wavelength. Alternatively the laser beam can be split and the separate wavelengths directed to separate attenuators to allow the percentage of both 533 nm and 1064 nm wavelengths to be adjusted. A gold bump on an integrated circuit can be bonded to a gold plated copper TAB tape lead.

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