Method and apparatus for soldering with a multiple tip and assoc

Details Method and apparatus for soldering with a multiple tip and assoc Method and apparatus for soldering with a multiple tip and assoc

1995-04-28

1996-10-15

Evans, Geoffrey S.

Electric heating

Metal heating

By arc

2191216, 21912177, 228 11, B23K 2600

Patent

active

055651194

ABSTRACT:
A laser head for simultaneously attaching solder balls to a carrier has at least one solder tip, with the number of solder tips being equal to the number of solder balls to be attached to the carrier. Each solder tip is heated by an optical fiber in thermal contact with the tip at one end of the fiber and coupled to a laser, preferably operating in the infrared wavelength range, at the other end of the fiber via a multiplexer coupling device. A spring is used in association with each solder tip to bias each solder tip to hold the carrier in contact with the solder balls. The tip absorbs the radiant energy as it exits the optical fiber, and the tip is heated. The laser and multiplexer permit precise control over the heat imparted to the tip, which in turn permits control of the amount of the solder ball that is reflowed.

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Advertisement for Hobart Lasers & Advanced Systems "We're Flexible", Industrial Laser Review, Dec. 1993, p. 11.

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