Method for the removal of a surface layer by a laser beam

Details Method for the removal of a surface layer by a laser beam Method for the removal of a surface layer by a laser beam

1996-05-06

1997-10-28

Warden, Robert J.

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

21912169, 2191218, B08B 700, B23K 2606

Patent

active

056813953

ABSTRACT:
In a method for uniformly removing layers from a coated surface, a laser beam is used for scanning the surface along parallel scanning lines wherein the laser beam has a surface illuminating cross-section with a central area defined between parallel lines extending transverse to the scanning lines and tapered marginal end areas extending from the transverse opposite ends of the central area to a predetermined distance and the scanning line distance is so selected that the central areas of the surface illuminating cross-sections of adjacent scanning lines are spaced by the predetermined distance and the tapered marginal end areas of the beam overlap between the scanning lines and together provide, in the overlap area, for essentially the same laser beam exposure as in the central area.

REFERENCES:
patent: 4654115 (1987-03-01), Egitto et al.
patent: 4756765 (1988-07-01), Woodroffe
patent: 5151135 (1992-09-01), Magee et al.
patent: 5328517 (1994-07-01), Cates et al.
patent: 5418349 (1995-05-01), Swain et al.
patent: 5491319 (1996-02-01), Economikos et al.
patent: 5562840 (1996-10-01), Swain et al.
patent: 5571335 (1996-11-01), Lloyd

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