Patent ID: 8292877

Claim:
A method of incising a piece of a material, the material having a surface, the method comprising the steps of: creating a sub-surface separation in a region of the material, the sub-surface separation comprising a bed in the material, the bed comprising a first surface area and a second surface area, the first surface area at least partially surrounding the second surface area, wherein the step of creating comprises; scanning the pulsed laser beam with a first pattern of beam spots along the first surface area, the first pattern having a first spot separation; and scanning the pulsed laser beam with a second pattern of beam spots along the second surface area, the second pattern having a second spot separation less than the first spot separation, the first surface area being less smooth than the second surface area based on the spot separations; and incising a periphery of the region with a pulsed laser beam to produce an edge of the piece, the edge comprising a periodically varying shape configured to secure the piece to the material when the piece is reintegrated with the material.