Patent Number: 
Section: claims

1. A laser apparatus comprising:a gas spraying portion comprising a slit and a plurality of opening portions;a laser oscillator which is provided over the gas spraying portion and outside the slit and is capable of outputting laser light;an optical system being arranged to allow the laser light to penetrate the slit and to irradiate a process object;a rotating base which is capable of placing a stage thereon and which moves along a straight line when the process object is irradiated with the laser light; andmeans for rotating the rotating base when the process object is irradiated with the laser light,wherein the gas spraying portion is arranged to allow a gas to be sprayed through the plurality of opening portions on the process object when the process object is irradiated with the laser light. 2. The laser apparatus according to claim 1,wherein the optical system is capable of processing the laser light into a linear shape. 3. The laser apparatus according to claim 1,wherein the gas spraying portion is placed over the rotating base. 4. The laser apparatus according to claim 1,wherein the laser oscillator is a continuous wave solid-state laser. 5. The laser apparatus according to claim 1,wherein the laser oscillator is selected from a continuous wave YAG laser, YVO4 laser, YLF laser, YAlO3 laser, glass laser, ruby laser, alexandrite laser, Ti: sapphire laser, and Y2O3 laser. 6. The laser apparatus according to claim 1,wherein the laser oscillator is selected from a continuous wave excimer laser, Ar laser, and Kr laser. 7. The laser apparatus according to claim 1,wherein the laser light is a second harmonic. 8. A laser apparatus comprising:a gas spraying portion comprising a slit and a plurality of opening portions;a laser oscillator which is provided over the gas spraying portion and outside the slit and is capable of outputting laser light;an optical system being arranged to allow the laser light to penetrate the slit and to irradiate a process object;a rotating base which is capable of placing a plurality of stages thereon and which moves along a straight line when the process object is irradiated with the laser light; andmeans for rotating the rotating base when the process object is irradiated with the laser light,wherein the gas spraying portion is arranged to allow a gas to be sprayed through the plurality of opening portions on the process object when the process object is irradiated with the laser light. 9. The laser apparatus according to claim 8,wherein the optical system is capable of processing the laser light into a linear shape. 10. The laser apparatus according to claim 8,wherein the gas spraying portion is placed over the rotating base. 11. The laser apparatus according to claim 8,wherein the laser oscillator is a continuous wave solid-state laser. 12. The laser apparatus according to claim 8,wherein the laser oscillator is selected from a continuous wave YAG laser, YVO4 laser, YLF laser, YAlO3 laser, glass laser, ruby laser, alexandrite laser, Ti: sapphire laser, and Y2O3 laser. 13. The laser apparatus according to claim 8,wherein the laser oscillator is selected from a continuous wave excimer laser, Ar laser, and Kr laser. 14. The laser apparatus according to claim 8,wherein the laser light is second harmonic. 15. The laser apparatus according to claim 1,wherein the slit is stationarily surrounded by the plurality of opening portions. 16. The laser apparatus according to claim 8,wherein the slit is stationarily surrounded by the plurality of opening portions. 17. The laser apparatus according to claim 1,wherein the laser apparatus is arranged to allow the process object to be irradiated a plurality of times, andwherein a moving distance of the rotating base along the straight line during one rotation thereof is smaller than a width of the laser light. 18. The laser apparatus according to claim 8,wherein the laser apparatus is arranged to allow the process object to be irradiated a plurality of times, andwherein a moving distance of the rotating base along the straight line during one rotation thereof is smaller than a width of the laser light. 19. The laser apparatus according to claim 1,wherein a reflector is provided over the stage. 20. The laser apparatus according to claim 8,wherein a reflector is provided over each of the plurality of stages. 21. The laser apparatus according to claim 1,wherein a reflector is provided over the stage, andwherein a surface of the reflector is waved. 22. The laser apparatus according to claim 8,wherein a reflector is provided over each of the plurality of stages, andwherein a surface of the reflector is waved. 23. The laser apparatus according to claim 1,wherein the slit, the plurality of opening portions, and a conduit through which the gas is supplied to the gas spraying portion are incorporated with the gas spraying portion. 24. The laser apparatus according to claim 8,wherein the slit, the plurality of opening portions, and a conduit through which the gas is supplied to the gas spraying portion are incorporated with the gas spraying portion.