Laser transfer process

Coating processes – Direct application of electrical – magnetic – wave – or... – Electromagnetic or particulate radiation utilized

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Details

1562728, 427 99, 427124, 427125, 4271261, 428620, 428626, 428672, B05D 306, B05D 512

Patent

active

052925595

ABSTRACT:
This invention relates to a method for producing a smooth continuous and adherent pressure bonded or cold welded layer of a metal containing composite on a base or target material through the driving force of a pulsed laser. The method includes the steps of selecting a laser transparent substrate, applying thereto a thin laser absorptive polymeric film characterized by a high optical coefficient of absorption to the wavelength of said laser, applying the metal containing composite to the absorptive polymeric film, and placing the base or target material in close proximity to said composite. The composite is a multilayered composite comprising laser absorptive polymer, gold, nickel and gold-flash, and the pulsed laser energy is directed through the transparent substrate toward said composite and is absorbed by the polymeric film causing heating and vaporization thereof while leaving portions of the polymeric film unvaporized. The vaporization provides the necessary pressure to blowoff the unvaporized portions of the absorptive polymeric film so as to propel the composite onto the base or target material.

REFERENCES:
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patent: 4534843 (1985-08-01), Johnson et al.
patent: 4666796 (1987-05-01), Levine
patent: 4752455 (1988-06-01), Mayer
patent: 4895771 (1990-01-01), Souter et al.
patent: 4929516 (1990-05-01), Pryor et al.
patent: 4987006 (1991-01-01), Williams et al.
patent: 5066550 (1991-11-01), Horibe et al.

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