Laser beam machine with mode conversion

Details Laser beam machine with mode conversion Laser beam machine with mode conversion

1999-08-31

2000-05-09

Mills, Gregory

Electric heating

Metal heating

By arc

21912173, 21912177, B23K 26067, B23K 26073

Patent

active

060606843

ABSTRACT:
A laser beam machine is used to locally remove color filters in a liquid crystal display via laser trimming. The laser beam machine includes an X-Y table, and a machine body containing a rotatable phase difference plate and a beam splitter that are arranged in the optical path of the laser beam. A workpiece is mounted on the X-Y table. The workpiece contains color filters that have been previously formed on transparent electrodes patterned on a transparent substrate. Beams spots are applied to the workpiece in a direction perpendicular to the longitudinal direction of the color filters and at a specific pitch. The laser beam machine may be used to form an opaque film around the color filters at low cost.

REFERENCES:
patent: 4533813 (1985-08-01), Rayburn et al.
patent: 4680855 (1987-07-01), Yamazaki et al.
patent: 5068515 (1991-11-01), Bergh et al.
patent: 5237149 (1993-08-01), Macken
patent: 5340619 (1994-08-01), Chen et al.
patent: 5373137 (1994-12-01), McLaughlin
patent: 5708252 (1998-01-01), Shinohara et al.

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