Methods for separating glass substrate sheets by laser-formed grooves

A method of separating a glass article from a glass substrate sheet, the method comprising:

• providing an un-strengthened glass substrate sheet;
• focusing a laser beam on at least one surface of the un-strengthened glass substrate sheet, wherein the laser beam comprises an asymmetrical intensity distribution at the at least one surface of the un-strengthened glass substrate sheet;
• translating the laser beam on the at least one surface of the un-strengthened glass substrate sheet along a desired groove line to form at least one groove on the at least one surface of the glass substrate sheet,
• wherein the at least one groove extends continuously around a perimeter of the glass article, the at least one groove partially extends through a thickness of the glass substrate sheet along the desired groove line;
• following forming the at least one groove, strengthening the glass substrate sheet by an ion-exchange strengthening process;
• and
• separating the strengthened glass article from the glass substrate sheet along the at least one groove, wherein at least a portion of one or more edges of the glass article are under compressive stress.