Patent ID: 8592716

Claim:
A method of scoring a glass surface along a line using a laser light beam, the line, being an axis of a coordinate system, defining a positive direction and a negative direction, the method comprising: (a) forming an initiation flaw in the glass surface at a first location along the line using a mechanical scoring head which makes contact with the glass surface for a contact time period T; (b) translating a light-emitting device so that its motion comprises a vectorial component that (i) is parallel to the line and (ii) as seen from a reference frame that does not translate with the light-emitting device is in the positive direction, the light-emitting device emitting a laser light beam which traverses a portion of the line; and (c) translating a nozzle in tandem with the light-emitting device, the nozzle emitting a cooling fluid which traverses a portion of the line; wherein for at least a portion of the contact time period T, the motion of the mechanical scoring head is retrograde motion which comprises a vectorial component that (i) is parallel to the line and (ii) as seen from a reference frame that translates with the light-emitting device, is in the negative direction.