Claims
- 1. A projection exposure apparatus for transferring a pattern on a projection original onto a photosensitive surface of a photosensitive substrate, comprising:
a light source; an illumination optical system, disposed between said light source and said projection original, which illuminates a pattern on said projection original with a light beam emitted from said light source; and a projection optical system, disposed between said projection original and said photosensitive substrate, which forms a pattern image on the photosensitive surface of said photosensitive substrate, wherein said light source supplies light beams having a wavelength shorter than 193 nm, said projection optical system includes a plurality of refractive optical elements, and said refractive optical elements constituting said projection optical system are all composed of CaF2.
- 2. A projection exposure apparatus according to claim 1, further comprising a band narrowing device which narrows a band of a spectrum of light having the wavelength shorter than 193 nm, supplied from said light source.
- 3. A projection exposure apparatus according to claim 2, wherein said band narrowing device narrows a band of the light emitted from said light source to satisfy the following condition:
- 4. A projection exposure apparatus according to claim 3, wherein said light source has an F2 laser.
- 5. A projection exposure apparatus according to claim 1, wherein said illumination optical system guides the illumination light to said photosensitive substrate to satisfy the following condition:
- 6. A projection exposure apparatus according to claim 5, wherein said light source has an F2 laser.
- 7. A projection exposure apparatus according to claim 1, wherein said light source has an F2 laser.
- 8. A projection exposure apparatus according to claim 7, wherein a gas in an interior of said projection optical system includes helium gas.
- 9. A projection exposure apparatus according to claim 1, wherein said projection optical system is constructed of only refractive optical elements.
- 10. A projection exposure apparatus according to claim 1, wherein a gas in an interior of said projection optical system includes helium gas.
- 11. A projection exposure apparatus according to claim 1, wherein said projection optical system includes at least one positive lens and at least one negative lens.
- 12. A projection exposure apparatus for transferring a pattern on a projection original onto a photosensitive surface of a photosensitive substrate, comprising:
a light source; an illumination optical system, disposed between said light source and said projection original, which illuminates a pattern on said projection original with a light beam emitted from said light source; and a projection optical system, disposed between said projection original and said photosensitive substrate, which forms a pattern image on a photosensitive surface of said photosensitive substrate, wherein said light source supplies light beams having a wavelength shorter than 193 nm, and said illumination optical system guides the illumination light to said projection original, the illumination light satisfying the following condition:Δλ≦7.0×10−13·L/NA2 Where
Δλ: a half-width of a spectrum of the illumination, L: a distance from a pattern surface on said projection original to the photosensitive surface of said photosensitive substrate; and NA: a photosensitive-substrate-side numerical aperture of said projection optical system.
- 13. A projection exposure apparatus according to claim 12, further comprising a band narrowing device which narrows a band of a spectrum of light having a wavelength shorter than 193 nm, supplied from said light source.
- 14. A projection exposure apparatus according to claim 13, wherein said projection optical system is constructed of only refractive optical elements.
- 15. A projection exposure apparatus according to claim 12, wherein said projection optical system has refractive optical elements, and
said refractive optical elements are all composed of a single kind of optical material.
- 16. A projection exposure apparatus according to claim 15, wherein a gas in an interior of said projection optical system includes helium gas.
- 17. A projection exposure apparatus according to claim 12, wherein a gas in an interior of said projection optical system includes helium gas.
- 18. A projection exposure apparatus according to claim 12, wherein said projection optical system includes refractive optical elements, and
said refractive optical elements includes CaF2.
- 19. A projection exposure apparatus according to claim 18, wherein a gas in an interior of said projection optical system includes helium gas.
- 20. A projection exposure apparatus according to claim 12, wherein said projection optical system includes at least one positive lens and at least one negative lens.
- 21. A projection exposure apparatus comprising:
an illumination optical system which illuminates a pattern on a projection original with illumination light having a wavelength shorter than 193 nm; and a projection optical system which forms a pattern image on a photosensitive surface of a photosensitive substrate, wherein said illumination optical system supplies the illumination light having such a spectral width as to satisfy the following condition:Δλ≦7.0×10−13·L/NA2where Δλ is a half-width of a spectrum of the illumination light given from said illumination optical system, L is a distance from a pattern surface on said projection original to the photosensitive surface of said photosensitive substrate, and NA is a photosensitive-substrate-side numerical aperture of said projection optical system, and said projection optical system is constructed of refractive optical elements.
- 22. A projection exposure apparatus according to claim 21, wherein said all refractive optical elements in said projection optical system are consisting of a single kind of optical material.
- 23. A projection exposure apparatus according to claim 22, wherein said optical material is CaF2.
- 24. A projection exposure apparatus according to claim 23, wherein a gas in an interior of said projection optical system includes helium gas.
- 25. A projection exposure apparatus according to claim 22, wherein a gas in an interior of said projection optical system includes helium gas.
- 26. A projection exposure apparatus according to claim 21, wherein a gas in an interior of said projection optical system includes helium gas.
- 27. A projection exposure apparatus according to claim 21, wherein said illumination optical system has an F2 laser.
- 28. A projection exposure apparatus according to claim 27, wherein all said refractive optical elements in said projection optical system are consisting of a single kind of optical material.
- 29. A projection exposure apparatus according to claim 27, wherein said illumination optical system includes a band narrowing device which narrows a band of a spectrum of the illumination light supplied by said F2 laser.
- 30. A projection exposure apparatus according to claim 21, wherein said illumination optical system includes:
a light source; and a band narrowing device which narrows a band of the spectrum of the illumination light supplied from said light source.
- 31. A projection exposure apparatus according to claim 21, wherein said illumination optical system includes a light source unit which supplies harmonic of a laser.
- 32. A projection exposure apparatus according to claim 21, wherein said projection optical system includes at least one positive lens and at least one negative lens.
- 33. A projection exposure apparatus comprising:
an illumination optical system which illuminates a pattern on a projection original with illumination light having a wavelength shorter than 193 nm; and a projection optical system which forms a pattern image on a photosensitive surface of a photosensitive substrate, wherein said illumination optical system supplies the illumination light having such a spectral width that a Strehl intensity on an image surface of said projection optical system is 0.8 or larger.
- 34. A projection exposure apparatus according to claim 33, wherein optical elements in said projection optical system consisting of only refractive optical elements.
- 35. A projection exposure apparatus according to claim 34, wherein said refractive optical elements consisting of a single kind of optical material.
- 36. A projection exposure apparatus according to claim 35, wherein said single kind of material is CaF2.
- 37. A projection exposure apparatus according to claim 34, wherein a gas in an interior of said projection optical system includes helium gas.
- 38. A projection exposure apparatus according to claim 34, wherein said illumination optical system supplies the illumination light having such a spectral width as to satisfy the following condition:
- 39. A projection exposure apparatus according to claim 38, wherein said illumination optical system includes:
a light source which supplies the light having a wavelength shorter than 193 nm; and a band narrowing device which narrows a band of a light beam supplied from said light source.
- 40. A projection exposure apparatus according to claim 33, wherein said illumination optical system includes a light source unit which supplies harmonic of a laser.
- 41. A projection exposure apparatus according to claim 33, wherein said illumination optical system includes an F2 laser.
- 42. A projection exposure apparatus according to claim 41, wherein a gas in an interior of said projection optical system includes helium gas.
- 43. A projection exposure apparatus according to claim 41, wherein said projection optical system includes refractive optical elements, and
all said refractive optical elements consisting of CaF2.
- 44. A projection exposure apparatus according to claim 41, wherein said projection optical system includes refractive optical elements, and
said refractive optical elements includes CaF2.
- 45. A projection exposure apparatus according to claim 33, wherein a gas in an interior of said projection optical system includes helium gas.
- 46. A projection exposure apparatus according to claim 33, wherein said projection optical system includes at least one positive lens and at least one negative lens.
- 47. A projection exposure method comprising:
a step of supplying illumination light having a wavelength shorter than 193 nm; a step of guiding the illumination light to a projection original having a predetermined pattern and illuminating said projection original with the illumination light; and a step of forming a pattern image on a photosensitive surface of a photosensitive substrate by a projection optical system including a plurality of refractive optical elements, wherein all said refractive optical elements in said projection optical system consisting of CaF2.
- 48. A projection exposure method according to claim 47, wherein a half-width Δλ of a spectrum of the illumination light in said illuminating step is set by:
- 49. A projection exposure method according to claim 48, wherein laser beams from an F2 laser are supplied in said illumination light supplying step.
- 50. A projection exposure method according to claim 47, wherein laser beams from an F2 excimer laser are supplied in said illumination light supplying step.
- 51. A projection exposure method according to claim 47, further comprising a step of narrowing a band of a spectrum of the illumination light.
- 52. A projection exposure method according to claim 47, wherein the illumination light transmits a space filled with helium gas, in said image forming step.
- 53. A device manufacturing method comprising:
a step of preparing a projection original formed with a circuit pattern; a step of preparing a photosensitive substrate; and a step of transferring the circuit pattern formed on said projection original onto said photosensitive substrate by use of said projection exposure method according to claim 47.
- 54. A projection exposure method comprising:
a step of supplying the illumination light of which a wavelength is shorter than 193 nm; a step of illuminating a pattern on a projection original with the illumination light; and a step of projecting a pattern image to a photosensitive substrate by use of a projection optical system, wherein said illuminating step comprises supplying the illumination light having such a spectral width as to satisfy the following condition:Δλ≦7.0×10−13·L/NA2where Δλ is a half-width of a spectrum of the illumination light given from said illumination optical system, L is a distance from a pattern surface on said projection original to the photosensitive surface of said photosensitive substrate, and NA is a photosensitive-substrate-side numerical aperture of said projection optical system, and said projecting step comprises guiding the light from said projection original to said photosensitive substrate via refractive optical elements.
- 55. A projection exposure method according to claim 54, wherein said projecting step comprises guiding the light from said projection original to said photosensitive substrate via only said refractive optical elements.
- 56. A projection exposure method according to claim 55, wherein laser beams from an F2 laser are supplied in said illumination light supplying step.
- 57. A projection exposure apparatus according to claim 55, wherein said refractive optical elements Consisting of a single kind of optical material.
- 58. A projection exposure method according to claim 57, wherein said optical material is CaF2.
- 59. A projection exposure method according to claim 55, wherein said illumination light supplying step includes a sub-step of narrowing the band of the spectrum of the light supplied.
- 60. A projection exposure method according to claim 59, wherein the light from an F2 laser is supplied in said illumination light supplying step.
- 61. A projection exposure method according to claim 60, wherein said illumination light supplying step includes a first sub-step of supplying laser beams having a predetermined wavelength, and a second sub-step of converting the laser beams into harmonics having a wavelength shorter than 193 nm.
- 62. A projection exposure method according to claim 54, wherein the light from an F2 laser is supplied in said illumination light supplying step.
- 63. A projection exposure method according to claim 54, wherein said illumination light supplying step includes a sub-step of narrowing the band of the spectrum of the light supplied.
- 64. A projection exposure method according to claim 54, wherein the illumination light transmits a space filled with helium gas, in said projecting step.
- 65. A device manufacturing method comprising:
a step of preparing a projection original formed with a circuit pattern; a step of preparing a photosensitive substrate; and a step of transferring the circuit pattern formed on said projection original onto said photosensitive substrate by use of said projection exposure method according to claim 54.
- 66. A projection exposure apparatus comprising:
a step of supplying illumination light having a wavelength shorter than 193 nm; a step of illuminating a pattern on a projection original with the illumination light; and a step of projecting a pattern image on a photosensitive substrate by use of a projection optical system, wherein said illumination light supplying step comprises supplying the illumination light having such a spectral width that a Strehl intensity on an image surface of said projection optical system is 0.8 or larger.
- 67. A projection exposure method according to claim 66, wherein said illuminating step comprises supplying the illumination light having such a spectral width as to satisfy the following condition:
- 68. A projection exposure method according to claim 67, wherein the light from an F2 laser is supplied in said illuminating step.
- 69. A projection exposure method according to claim 66, wherein the light from an F2 laser is supplied in said illuminating step.
- 70. A projection exposure method according to claim 69, wherein the illumination light transmits a space filled with helium gas, in said projecting step.
- 71. A projection exposure method according to claim 69, wherein said projecting step comprises guiding the light from said projection original to said photosensitive substrate via said refractive optical elements consisting of CaF2.
- 72. A projection exposure method according to claim 69, wherein said projecting step comprises guiding the light from said projection original to said photosensitive substrate via only said refractive optical elements consisting of CaF2.
- 73. A projection exposure method according to claim 66, wherein said projecting step comprises guiding the light from said projection original to said photosensitive substrate via only said refractive optical elements.
- 74. A projection exposure method according to claim 73, wherein said illuminating step comprises supplying the illumination light having such a spectral width as to satisfy the following condition:
- 75. A device manufacturing method comprising:
a step of preparing a projection original formed with a circuit pattern; a step of preparing a photosensitive substrate; and a step of transferring the circuit pattern formed on said projection original onto said photosensitive substrate by use of said projection exposure method according to claim 66.
- 76. A method of manufacturing a projection exposure apparatus, comprising:
a step of preparing an illumination optical system which illuminates a pattern on a projection original with illumination light having a wavelength shorter than 193 nm; and a step of preparing a projection optical system which forms a pattern image on a photosensitive surface of a photosensitive substrate by a projection optical system, wherein said illumination optical system is constructed to supply the illumination light having such a spectral width as to satisfy the following condition:Δλ≦7.0×10−13·L/NA2where Δλ is a half-width of a spectrum of the illumination light given from said illumination optical system, L is a distance from a pattern surface on said projection original to the photosensitive surface of said photosensitive substrate, and NA is a photosensitive-substrate-side numerical aperture of said projection optical system, said projection optical system preparing step includes a sub-step of preparing a plurality of refractive optical elements, and a sub-step of assembling said plurality of refractive optical elements, and said method further comprises a step of assembling said illumination optical system and said projection optical system.
- 77. A projection exposure method according claim 47, wherein said projection optical system having a catadioptric system.
- 78. A projection exposure method according claim 54, wherein said projection optical system having a catadioptric system.
- 79. A projection exposure method according claim 66, wherein said projection optical system having a catadioptric system.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9-322482 |
Nov 1997 |
JP |
|
Parent Case Info
[0001] This application claims the benefit of International application PCT/JP98/04999 which is hereby incorporated by reference.
Continuations (1)
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Number |
Date |
Country |
Parent |
09565119 |
May 2000 |
US |
Child |
10162064 |
Jun 2002 |
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
PCT/JP98/04999 |
Nov 1998 |
US |
Child |
09565119 |
May 2000 |
US |