Method and apparatus for scoring and separating a brittle...

Details Method and apparatus for scoring and separating a brittle... Method and apparatus for scoring and separating a brittle...

2011-07-19

2011-07-19

Evans, Geoffrey S (Department: 3742)

Electric heating

Metal heating

By arc

C225S002000

Reexamination Certificate

active

07982162

ABSTRACT:
A method and an apparatus for both scoring and separating a brittle material, and in particular a glass sheet or substrate, using only a single laser beam. A radiation zone created by the beam incident on the glass substrate, and the radiation zone is effectively formed into two portions by a coolant jet incident on the radiation zone. The radiation zone is separated into a leading portion, which generates a vent crack partially through a thickness of the substrate, and a trailing portion that propagates the vent crack through the remainder of the substrate, thereby separating the substrate.

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