Flat panel display and manufacturing method thereof
A method of manufacturing a flat panel display is disclosed. In one aspect, the method includes preparing first and second mother substrates, forming a plurality of display cells on at least one of the mother substrates, forming a plurality of sealant lines enclosing the respective cells on either one of the mother substrates and assembling and sealing the two mother substrates with the sealant lines interposed therebetween. The method also includes mounting the two mother substrates on a stage, irradiating a laser beam to a defined light irradiation region of the mother substrates and cutting the mother substrates while moving the light irradiation region along an imaginary cut line where the mother substrates are to be cut. The light irradiation region includes a linear region and a curved region.
1. A method of manufacturing a flat panel display, comprising:
preparing first and second mother substrates;
forming a plurality of display cells on at least one of the mother substrates;
forming a plurality of sealant lines enclosing the respective cells on either one of the mother substrates;
assembling and sealing the two mother substrates with the sealant lines interposed therebetween;
mounting the two mother substrates on a stage;
irradiating a laser beam to a defined light irradiation region of the mother substrates; and
cutting the mother substrates while moving the light irradiation region along an imaginary cut line where the mother substrates are to be cut,
wherein the light irradiation region comprises a linear region and a curved region.
2. The method of claim 1 , wherein the cutting comprises:
cutting the first mother substrate which is positioned on the top of the second mother substrate;
turning over the two mother substrates so that the second mother substrate is positioned on the top of the first mother substrate; and
cutting the second mother substrate.
3. The method of claim 2 , wherein the cutting comprises:
cutting the mother substrates such that the display device has a plurality of linear portions and a plurality of corners, and that the corners are convex when viewed from an external side of the mother substrates.
4. The method of claim 1 , wherein the cutting comprises physically removing at least a portion of the mother substrates within the light irradiation region.
5. The method of claim 4 , further comprising cleaning the area from which the portion of the mother substrates is removed by the laser beam.
6. The method of claim 1 , wherein the laser beam has a unit irradiation time shorter than about 50 ps (picoseconds) and a pulse frequency in the range of about 0.1 MHz to about 100 MHz.
7. The method of claim 4 , further comprising preheating the mother substrates before removing the portion of the mother substrates.
8. The method of claim 7 , wherein the preheating is performed with the use of a carbonic acid (CO 2 ) gas laser beam.
9. The method of claim 1 , further comprising varying, with the use of a light swing unit, the incident angle of the laser beam with respect to the mother substrates by swinging the laser beam.
10. The method of claim 9 , wherein the light swing unit comprises a reflector configured to reflect an incident laser beam and a driver having a plurality of rotation shafts configured to drive the reflector by finely swinging the reflector.
11. The method of claim 10 , wherein the rotation shafts comprise a first rotation shaft and a second rotation shaft crossing the first rotation shaft.