Laser bonding highly reflective surfaces

Details Laser bonding highly reflective surfaces Laser bonding highly reflective surfaces

1993-03-02

1993-12-28

Albritton, C. L.

Electric heating

Metal heating

By arc

21912164, 219 8512, B23K 2600

Patent

active

052742105

ABSTRACT:
This disclosure relates to laser bonding electrical components having conductive elements which are naturally reflective of the laser beam wavelength. Component leads or pads which are made of copper or have a gold coating, for example, will reflect the wavelength of an Nd:YAG laser, making it difficult to form physical and electrical bonds using the laser bonding technique. In preferred embodiments, the conductive elements are coated with a non-flux, non-metallic, coating material which is less reflective of the laser energy than the conductive elements, making it possible to efficiently use a laser to accomplish bonding.

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Alexander A. Bosna and Jeffrey D. Emmel, Westinghouse Electric Corporation, pp. 239-246, `Use of Lasers in High Speed Termination of Flexible Printed Wiring`.

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