WO2010023841A1 - レーザ装置、光治療装置、露光装置、デバイス製造方法、及び被検物検査装置 - Google Patents
レーザ装置、光治療装置、露光装置、デバイス製造方法、及び被検物検査装置 Download PDFInfo
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- WO2010023841A1 WO2010023841A1 PCT/JP2009/003916 JP2009003916W WO2010023841A1 WO 2010023841 A1 WO2010023841 A1 WO 2010023841A1 JP 2009003916 W JP2009003916 W JP 2009003916W WO 2010023841 A1 WO2010023841 A1 WO 2010023841A1
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- excitation light
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- power level
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
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- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
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Definitions
- the present invention relates to a laser apparatus, and a phototherapy apparatus, an exposure apparatus, a device manufacturing method, and a test object inspection apparatus using the same.
- Patent Document 1 discloses a laser light source that generates signal light in the infrared to visible region, an optical amplifier that amplifies signal light generated by the laser light source, and an amplifier that is amplified by the optical amplifier.
- An ultraviolet light source including a wavelength conversion optical system that converts the wavelength of the signal light into ultraviolet light and outputs the light, and an excitation light source that supplies excitation light to the optical amplifier is disclosed.
- Patent Document 1 also discloses a phototherapy device, an exposure device, and a test object inspection device using such an ultraviolet light source.
- an optical fiber connecting the pumping light source and the optical amplifier an optical fiber on the optical amplifier side with one end connected to the optical amplifier and the other end opened, and one end pumping light source And the optical fiber on the excitation light source side with the other end open.
- the laser device can be separated into a part on the optical amplifier side and a part on the pumping light source side, and its transportation and the like are facilitated.
- the other end of the optical fiber on the optical amplifier side and the other end of the optical fiber on the excitation light source side are connected by fusion or the like.
- the optical fiber connecting between the pumping light source and the optical amplifier of this laser apparatus has a connection part by fusion or the like in the middle thereof.
- the optical amplifier connecting the pumping light source and the optical amplifier is cut halfway before the optical amplifier If the other end of the optical fiber on the side and the other end of the optical fiber on the excitation light source side are connected by fusion or the like, the exchange becomes easy.
- connection work such as the fusion of optical fibers as described above
- the fused state is caused by mistakes due to low skill of the operator, failure of the fusion machine, poor working environment, etc.
- the connection status may be poor.
- the connection itself such as the fusion between the optical fibers as described above may be forgotten.
- connection state such as the fusion state of optical fibers as described above
- the transmittance between the other end of the optical fiber on the optical amplifier side and the end face of the optical fiber on the pumping light source side is It becomes lower than the case of normal connection. Therefore, in this state, when high-power light is generated from the pumping light source in an attempt to start the operation of the laser device, high-power light energy from the pumping light source is absorbed in a portion where the transmittance of the optical fiber is low.
- An optical fiber overheats and burns (a phenomenon called FiberFfusion).
- connection state such as the fusion state of the optical fibers as described above
- the connection state such as the fusion state deteriorates due to aging, or physical force is applied to the optical fiber.
- the optical fiber may be damaged. Also in this case, Fiber fusion occurs.
- the present invention has been made in view of such circumstances, and Fiber It is an object to provide a laser apparatus that can further reduce the possibility of occurrence of fusion, and a phototherapy apparatus, an exposure apparatus, a device manufacturing method, and a test object inspection apparatus using such a laser apparatus. To do.
- the laser device includes an excitation light source, and an optical amplification unit that receives the excitation light output from the excitation light source via an optical fiber having a connection part in the middle thereof and performs optical amplification.
- a laser apparatus that outputs light output from an amplification unit or light based on the light as output light, the control unit controlling the excitation light source, and the optical amplification unit side from the excitation light source via the optical fiber And a monitor unit for monitoring the power level of the excitation light transmitted to the device.
- the control unit outputs the excitation light of the predetermined power level to the excitation light source after the excitation light output of the excitation light source is started, and then the excitation light of the predetermined power level is output from the excitation light source.
- the pumping light source When the power level monitored by the monitor unit is higher than a predetermined value, the pumping light source outputs pumping light having a power level higher than the predetermined power level, while the pumping light source outputs the predetermined power level.
- the pumping light source is controlled so that the pumping light source stops the pumping light output when the power level monitored by the monitor unit is equal to or lower than the predetermined value when the pumping light is output.
- the laser apparatus includes an excitation light source and an optical amplification unit that receives the excitation light output from the excitation light source via an optical fiber and performs optical amplification, and is output from the optical amplification unit
- a laser device that outputs light or light based on the light as output light
- the controller that controls the excitation light source, and the excitation that has been transmitted from the excitation light source to the optical amplification unit via the optical fiber
- a monitor unit that monitors the power level of light.
- the control unit outputs the excitation light to the excitation light source when the power level monitored by the monitoring unit becomes a predetermined value or less when the excitation light source outputs the excitation light.
- the excitation light source is controlled so as to stop.
- a phototherapy device includes the laser device according to the first or second aspect, and an irradiation optical system that guides and radiates output light output from the laser device to a treatment site. is there.
- An exposure apparatus is an exposure apparatus for transferring a mask pattern onto a photosensitive object, wherein the laser apparatus according to the first or second aspect and output light output from the laser apparatus are transferred to the mask.
- a device manufacturing method is a device manufacturing method including a lithography process, and in the lithography process, the pattern of the mask is transferred to the photosensitive object using the exposure apparatus according to the fourth aspect. .
- a test object inspection apparatus includes the laser device according to the first or second aspect, a support unit that holds the test object, a detector that detects a projected image of the test object, An illumination optical system that irradiates the test object with output light output from a laser device, and a projection optical system that projects the light from the test object onto the detector.
- a laser apparatus that can further reduce the possibility of occurrence of Fiber fusion, and a phototherapy apparatus, an exposure apparatus, a device manufacturing method, and a test object inspection apparatus using such a laser apparatus. Can be provided.
- FIG. 1 is a schematic configuration diagram showing a laser device according to a first embodiment of the present invention. It is a schematic block diagram which shows the excitation light source side apparatus in FIG. It is a schematic block diagram which shows the optical amplifier part side apparatus in FIG. It is a schematic block diagram which shows the phototherapy apparatus by the 2nd Embodiment of this invention. It is a schematic block diagram which shows the irradiation optical system and observation optical system which comprise the phototherapy apparatus shown in FIG. It is a schematic block diagram which shows typically the exposure apparatus by 3rd Embodiment of this Embodiment. It is a schematic block diagram which shows the mask defect inspection apparatus by the 4th Embodiment of this invention.
- FIG. 1 is a schematic configuration diagram showing a laser apparatus 1 according to a first embodiment of the present invention.
- the laser device 1 according to the present embodiment includes an excitation light source side device 2, an optical amplification unit side device 3, optical fibers 4A, 4B, and 4C for excitation light that connect between these devices 2 and 3, and monitor signals.
- the electric signal line 5 is provided.
- the optical fiber 4A is composed of optical fibers 4Aa and 4Ab whose one ends are connected by a connection portion 4Ac, and has a connection portion 4Ac in the middle.
- the other end of the optical fiber 4Aa is connected to the excitation light source side device 2, and the other end of the optical fiber 4Ab is connected to the optical amplification unit side device 3.
- the optical fiber 4B is composed of optical fibers 4Ba and 4Bb whose one ends are connected to each other by a connection portion 4Bc, and has a connection portion 4Bc in the middle.
- the other end of the optical fiber 4Ba is connected to the excitation light source side device 2, and the other end of the optical fiber 4Bb is connected to the optical amplification unit side device 3.
- the optical fiber 4C is composed of optical fibers 4Ca and 4Cb whose one ends are connected to each other by a connecting portion 4Cc, and has a connecting portion 4Cc in the middle.
- the other end of the optical fiber 4Ca is connected to the excitation light source side device 2, and the other end of the optical fiber 4Cb is connected to the optical amplification unit side device 3.
- these optical fibers are all connected by fusion, and the connection portions 4Ac, 4Bc, 4Cc are fusion portions.
- the connection of these optical fibers is not limited to fusion, and the connection portions 4Ac, 4Bc, and 4Cc are not limited to fusion portions.
- the optical fibers 4Aa, 4Ba, 4Ca and the optical fibers 4Ab, 4Bb, 4Cb are not connected by the connecting portions 4Ac, 4Bc, 4Cc, respectively, but are separated from each other. , Transport and the like are performed. Then, at the time of installation or after replacement of only the pumping light source side device 2, for example, the optical fibers 4Aa, 4Ba, 4Ca and the optical fibers 4Ab, 4Bb, 4Cb are connected by the connecting portions 4Ac, 4Bc, 4Cc, respectively. .
- FIG. 2 is a schematic configuration diagram showing the excitation light source side device 2 in FIG.
- FIG. 3 is a schematic configuration diagram showing the optical amplification unit side device 3 in FIG.
- the optical fibers 4Aa, 4Ba, and 4Ca are connected to the Raman fiber lasers 71 of the laser units 61A, 61B, and 61C of the excitation light source side device 2, respectively.
- the optical fibers 4Ab, 4Bb, and 4Cb are connected to the couplers 51A, 51B, and 51C of the optical amplification unit side device 3, respectively.
- the pumping lights generated by the Raman fiber lasers 71 of the laser units 61A, 61B, 61C of the pumping light source side device 2 are transmitted by the optical fibers 4A, 4B, 4C, respectively, and reach the couplers 51A, 51B, 51C, respectively. To do.
- optical amplification unit side device 3 will be described with reference to FIG.
- excitation light source side device 2 will be described in detail later.
- the pumping light that has reached the coupler 51A is branched into two at a predetermined ratio, most of which is supplied to an EDFA (erbium-doped fiber optical amplifier) 22A as an optical amplifier of the optical amplifying unit 20, and the rest is the
- the light is supplied to a detector 52A such as a photodiode as a monitor unit for monitoring the power level of the excitation light.
- the detector 52A outputs a monitor signal indicating the power level of the excitation light to the interface 53.
- the pumping light that has reached the coupler 51B is branched into two at a predetermined ratio, most of which is supplied to the EDFA 22B as an optical amplifier of the optical amplifying unit 20, and the rest is a monitoring unit that monitors the power level of the pumping light To a detector 52B such as a photodiode.
- the detector 52B outputs a monitor signal indicating the power level to the interface 53.
- the pumping light that has reached the coupler 51C is branched into two at a predetermined ratio, most of which is supplied to the EDFA 22C as an optical amplifier of the optical amplifying unit 20, and the rest is a monitoring unit that monitors the power level of the pumping light To a detector 52C such as a photodiode.
- the detector 52C outputs a monitor signal indicating the power level to the interface 53.
- the couplers 51A, 51B, 51C and the detectors 52A, 52B, 52C are arranged at positions where the power levels of the respective excitation lights can be directly or indirectly monitored, they are arranged at the positions mentioned above. You don't have to.
- the couplers 51A, 51B, and 51C and the detectors 52A, 52B, and 52C can be provided in the middle of the EDFAs 22A, 22B, and 22C.
- the interface 53 converts the monitor signals from the detectors 52A, 52B, and 52C into a predetermined signal format, and sends them to the excitation light source side device 2 via the signal line 5.
- the optical amplifying unit side device 3 includes, in addition to the couplers 51A, 51B, 51C and the detectors 52A, 52B, 52C, a seed light generating unit 10 configured as a laser light source, An optical amplification unit 20 that optically amplifies the seed light generated by the generation unit 10 and a wavelength conversion unit 30 that converts the wavelength of the light amplified by the optical amplification unit 20 are provided.
- the output light of the wavelength conversion unit 30 of the optical amplification unit side device 3 is the output light of the laser device 1.
- ultraviolet pulse light having a wavelength of 193.4 nm is output as the output light.
- the wavelength conversion unit 30 may be removed, and the output light of the optical amplification unit 20 may be used as the output light of the laser device 1.
- the seed light generator 10 includes a DFB (distributed feedback type) semiconductor laser 11 and an electric pulse generator 12.
- the DFB semiconductor laser 11 for example, an InGaAsP or DFB semiconductor laser having an oscillation wavelength of 1.547 ⁇ m is used.
- the electric pulse generator 12 is a driver that controls the operation of the DFB semiconductor laser 11.
- the DFB semiconductor laser 11 outputs pulsed seed light (signal light, fundamental wave) having a peak power of about 10 mW to the optical amplification unit 20.
- the optical amplifying unit 20 includes a coupler 21 that branches the seed light from the seed light generating unit 10 into three, a first EDFA 22C as an optical amplifier that amplifies one branched light, and another one branched.
- a delay device 23 that delays one light a second EDFA 22B as an optical amplifier that amplifies the light delayed by the delay device 23, a delay device 25 that delays the remaining one branched light, and a delay device 25
- a third EDFA 22A as an optical amplifier that amplifies the light delayed by.
- the EDFAs 22A, 22B, and 22C perform optical amplification upon receiving the above-described excitation lights.
- an ellipse indicates a collimator lens and a condenser lens, and the description thereof is omitted.
- P-polarized light is indicated by an arrow
- S-polarized light is indicated by a dot with a circle
- a fundamental wave is indicated by ⁇
- an n-fold wave is indicated by n ⁇ .
- the P-polarized fundamental wave amplified by the first EDFA 22 ⁇ / b> C is incident on the first second harmonic wave forming optical element (PPLN crystal) 31, and the first second harmonic wave forming optical element 31.
- a double wave of P-polarized light is generated along with the fundamental wave.
- the fundamental wave and the second harmonic wave are incident on the third harmonic wave forming optical element (LBO crystal) 32.
- a triple wave of S-polarized light is generated from the triple wave forming optical element 32 together with a fundamental wave and a double wave.
- the second harmonic wave forming optical element 32 is not limited to a PPLN crystal, and a PPKTP crystal, a PPSLT crystal, an LBO crystal, or the like can also be used.
- the two-wavelength wave plate 33 By passing these lights through the two-wavelength wave plate 33, only the second harmonic wave is converted into S-polarized light.
- the two-wavelength wave plate for example, a wave plate made of a uniaxial crystal flat plate cut in parallel with the optical axis of the crystal is used.
- the polarization is rotated, and for light of the other wavelength, the thickness of the wavelength plate (crystal) is adjusted to that of one wavelength so that the polarization does not rotate.
- the light is cut to be an integral multiple of ⁇ / 2
- the light of the other wavelength is cut to be an integral multiple of ⁇ .
- the second harmonic wave and the third harmonic wave are incident on the fifth harmonic wave forming optical element (LBO crystal) 34.
- a fifth harmonic wave of P-polarized light is generated from the fifth harmonic wave forming optical element 34 together with the second harmonic wave and the third harmonic wave.
- the fundamental wave of P-polarized light passes through the fifth harmonic wave forming optical element 34 as it is.
- the fifth harmonic wave generated from the fifth harmonic wave forming optical element 34 has an elliptical cross section because of a walk-off, and as it is, the light collecting property is poor and cannot be used for the next wavelength conversion. Therefore, the elliptical cross-sectional shape is shaped into a circle by the cylindrical lenses 35 and 36.
- a BBO crystal or a CBO crystal can also be used as the fifth harmonic wave forming optical element 34.
- the fundamental wave of P-polarized light amplified by the second EDFA 22B is incident on the second second harmonic wave forming optical element (PPLN crystal) 37, and the second harmonic wave forming optical element 37 emits the fundamental wave.
- PPLN crystal second second harmonic wave forming optical element
- a double wave of P-polarized light is generated.
- PPKTP crystal, PPSLT crystal, LBO crystal or the like may be used instead of the PPLN crystal.
- the S-polarized fundamental wave amplified by the third EDFA 22A is synthesized by the dichroic mirror 41 with the above-mentioned P-polarized double wave.
- the dichroic mirror 41 transmits the fundamental wave and reflects the second harmonic wave.
- the synthesized S-polarized fundamental wave and P-polarized second harmonic are synthesized by the aforementioned P-polarized fifth harmonic by the dichroic mirror 38.
- the dichroic mirror 38 transmits the fundamental wave and the second harmonic wave and reflects the fifth harmonic wave.
- a bulk type optical element can be used.
- a color separation / synthesis mirror dichroic mirror
- a reflection type and a transmission type diffractive optical element can be used.
- the synthesized fundamental wave of S-polarized light, the second harmonic wave of P-polarized light, and the fifth harmonic wave of P-polarized light are incident on the seventh harmonic wave forming optical element (CLBO crystal) 39, and from the seventh harmonic wave forming optical element 39, A 7th harmonic wave of S-polarized light is generated. These lights are incident on an eighth harmonic wave forming optical element (CLBO crystal) 40, where the fundamental wave of S polarization and the seventh harmonic wave of S polarization are combined to generate an eighth harmonic wave of P polarization.
- an eighth harmonic wave having a wavelength of 193.4 nm is separated from the light emitted from the eighth harmonic wave forming optical element 40 by a dichroic mirror, a polarization beam splitter, and a prism (not shown), and this is separated from the wavelength converter 30. Output as output light.
- the pumping light source side device 2 receives the aforementioned monitor signals via the laser units 61A, 61B, 61C for supplying pumping light to the optical fibers 4A, 4B, 4C, the central control unit 62, and the signal line 5, respectively. And an interface 63 for converting the monitor signal into a predetermined signal format and supplying the converted signal to the central control unit 62.
- the laser unit 61A includes a Raman fiber laser 71 as an excitation light source, a drive unit 72, a unit control unit 73, and an interlock control unit 74.
- the drive unit 72 drives the Raman fiber laser 71 by supplying a drive current to the Raman fiber laser 71 under the control of the unit control unit 73.
- the unit control unit 73 receives from the central control unit 62 an on / off command for generating or stopping the pumping light from the Raman fiber laser 71 and a command signal indicating a command for the power level of the pumping light when generating the pumping light. Then, the drive unit 72 is controlled so that the command indicated by the command signal is realized.
- the interlock control unit 74 In response to the interlock signal supplied from the central control unit 62, the interlock control unit 74 cuts off the power supplied from the power source (not shown) to the drive unit 72, etc. The generation of excitation light is forcibly stopped.
- the interlock control unit 74 also receives an interlock signal from an emergency stop button (not shown) or the like, and forcibly stops the generation of excitation light from the Raman fiber laser 71. Since the laser units 61B and 61C have the same configuration as the laser unit 61A, description thereof is omitted.
- the central control unit 62 Based on the monitor signal from the interface 63 (that is, the monitor signal from the detectors 52A, 52B, 52C of the optical amplification unit side device 3), the central control unit 62, as will be described below, the laser units 61A, 61B. , 61C are supplied with the command signal and the interlock signal, respectively.
- the central control unit 73 causes the unit control unit 73 of the laser units 61A, 61B, and 61C to output excitation light of a predetermined power level WL from the Raman fiber laser 71.
- Each command signal is supplied.
- the Raman fiber laser 71 of the laser units 61A, 61B, 61C outputs pumping light of a predetermined power level WL.
- the predetermined power level WL is not limited even if the connection state of the connection parts 4Ac, 4Bc, 4Cc is bad or the optical fibers 4Aa, 4Ba, 4Ca are not connected to the optical fibers 4Ab, 4Bb, 4Cb.
- the power level is low.
- the central control unit 62 based on the monitor signals from the detectors 52A, 52B, and 52C, when the Raman fiber laser 71 of the laser units 61A, 61B, and 61C outputs the excitation light of the predetermined power level WL, respectively. Whether any of the power levels monitored by the detectors 52A, 52B, and 52C is higher than the predetermined value S1 or whether one or more of those power levels is lower than the predetermined value S1 is determined. . For convenience of explanation, this determination is called initial determination.
- the central control unit 62 sends the EDFAs 22A, 22B, and 22C to the unit control unit 73 of the laser units 61A, 61B, and 61C.
- a command signal for outputting excitation light of a power level WH (WH> WL) sufficiently high for performing an amplification operation from the Raman fiber laser 71 is supplied.
- the excitation light of the power level WH (WH> WL) generated from the Raman fiber laser 71 of the laser units 61A, 61B, 61C is supplied to the EDFAs 22A, 22B, 22C, and is in a steady operating state.
- output light having a wavelength of 193.4 nm is output from the wavelength conversion unit 30. If the monitored power level is higher than the predetermined value S1, the optical fibers 4Aa, 4Ba, 4Ca and the optical fibers 4Ab, 4Bb, 4Cb are appropriately connected, and the connection portions 4Ac, 4Bc, 4Cc. Is set to such a value that it can be confirmed that the connection state is good.
- the central control unit 62 sends an interlock signal to the interlock control unit 74 of the laser units 61A, 61B, 61C.
- the Raman fiber laser 71 of the laser units 61A, 61B, 61C stops outputting the excitation light.
- the interlock control unit 74 not only stop the output of the excitation light from the Raman fiber laser 71 but also issue an alarm by operating an alarm device (not shown).
- any one of the values is equal to or less than the predetermined value S1
- any one of the connection portions 4Ac, 4Bc, 4Cc is in a poor connection state or any of the optical fibers 4Aa, 4Ba, 4Ca and the optical fibers 4Ab, 4Bb, 4Cb. It may not be connected.
- the Raman fiber laser 71 of the laser units 61A, 61B, and 61C stops the output of the excitation light without shifting to a steady operation state, so that there is no possibility that Fiber fusion will occur. .
- the central control unit 62 continues to output a high power level WH when the Raman fiber laser 71 of the laser units 61A, 61B, and 61C continues to operate in a steady state.
- the power levels monitored by the detectors 52A, 52B, 52C are higher than the predetermined value S2 based on the monitor signals from the detectors 52A, 52B, 52C, or It is repeatedly determined whether any one or more of the power levels is equal to or less than the predetermined value S2. For convenience of explanation, this determination is referred to as a steady operation determination. In the steady operation state, the power level of the pumping light output from the Raman fiber laser 71 is not necessarily constant.
- the central control unit 62 continues the steady operation state. If the monitored power level is higher than the predetermined value S2, the connection portions 4Ac, 4Bc, 4Cc are in good connection and the optical fibers 4A, 4B, 4C are damaged and broken. It is set to such a value that it can be confirmed that there is not. Accordingly, since the connection state of the connection parts 4Ac, 4Bc, 4Cc is good and the optical fiber 4A, 4B, 4C is not damaged and broken, the steady operation state is continued. This eliminates the possibility that Fiber fusion will occur when the steady operation is continued.
- the central control unit 62 sends an interlock signal to the interlock control unit 74 of the laser units 61A, 61B, 61C. To do. As a result, the Raman fiber laser 71 of the laser units 61A, 61B, 61C stops outputting the excitation light. At this time, it is preferable that the interlock control unit 74 not only stop the output of the excitation light from the Raman fiber laser 71 but also issue an alarm by operating an alarm device (not shown).
- connection state of any of the connection portions 4Ac, 4Bc, 4Cc may be deteriorated due to a change over time or the like, or the optical fibers 4A, 4B, 4C may be broken due to damage. There is sex. In such a case, the steady operation state ends, and the Raman fiber laser 71 of the laser units 61A, 61B, 61C stops the output of the excitation light, so that there is no possibility that Fiber fusion will occur.
- the excitation light output based on the result of the determination during the steady operation and the result as in the present embodiment in order to further reduce the possibility of occurrence of fiber fusion.
- the optical fibers 4A, 4B, and 4C may be optical fibers that do not have the connection portions 4Ac, 4Bc, and 4Cc on the way.
- FIG. 4 is a schematic configuration diagram showing a phototherapy device 80 according to the second embodiment of the present invention.
- FIG. 5 is a schematic configuration diagram showing the irradiation optical system 100 and the observation optical system 110 constituting the phototherapy device 80 shown in FIG.
- the phototherapy device 80 according to the present embodiment is configured using the laser device 1 according to the first embodiment, and irradiates the cornea with ultraviolet laser light (output light of the laser device 1) (ablation of the cornea surface ( This is a device that treats myopia, astigmatism, etc. by correcting the curvature or irregularity of the cornea by performing PRK: Photorefractive Keratectomy (LASIK: Laser Intrastromal Keratomileusis).
- PRK Photorefractive Keratectomy
- LASIK Laser Intrastromal Keratomileusis
- the phototherapy device 80 basically has the above-described laser device 1 and the ultraviolet laser light Lv output from the laser device 1 in the device housing 90.
- An irradiation optical system 100 that guides and irradiates the surface (treatment site) and an observation optical system 110 that observes the treatment site are configured.
- the apparatus housing 90 is disposed on the base portion 91 via the XY movement table 92, and the entire apparatus housing 90 with respect to the eyeball EY is in the direction indicated by the arrow X in FIG. It is configured to be movable in the Y direction perpendicular to.
- the structure of the irradiation optical system 100 and the observation optical system 110 is shown in FIG.
- the irradiation optical system 100 includes a condenser lens 101 that condenses the ultraviolet laser light Lv having a wavelength of 193.4 nm emitted from the laser device 1 so as to form a predetermined spot diameter on the eyeball EY, and a condenser lens 101. And a dichroic mirror 102 that reflects the ultraviolet laser light from the eye and irradiates the surface of the cornea HC of the eyeball EY to be treated.
- the dichroic mirror 102 is set so as to reflect the light in the ultraviolet region and transmit the light in the visible region, and reflects the ultraviolet laser light Lv coaxially with the optical axis of the observation optical system 110 to be described below to Irradiation is possible.
- the observation optical system 110 has an illumination lamp 115 that illuminates the surface of the cornea HC of the eyeball EY to be treated, and light in the visible region that is illuminated by the illumination lamp 115 and reflected by the cornea HC and transmitted through the dichroic mirror 102.
- an operator such as an ophthalmologist can perform phototherapy while visually observing through the observation optical system 110.
- the apparatus housing 90 is moved in the X direction and the Y direction while visually observing the eyeball EY, and the surface of the cornea HC to be treated is irradiated with ultraviolet laser light as spot light to cause the irradiation region to evaporate.
- the operation control device (not shown) controls the operation of the XY movement table 92, and the device housing 90 is moved in the X and Y directions to scan and move the spot light irradiated on the surface of the cornea HC.
- corrective treatment such as myopia, astigmatism, and hyperopia can be performed.
- the laser device 1 according to the first embodiment since the laser device 1 according to the first embodiment is used, the possibility of occurrence of fiber fusion can be reduced.
- FIG. 6 is a schematic block diagram that schematically shows an exposure apparatus 120 according to the third embodiment of the present embodiment.
- the exposure apparatus 120 according to the present embodiment is configured using the laser apparatus 1 according to the first embodiment, and is used in a photolithography process which is one of semiconductor manufacturing processes.
- the exposure apparatus used in the photolithography process is in principle the same as photolithography, and a device pattern precisely drawn on a photomask (reticle) is applied to a semiconductor wafer or glass substrate coated with a photoresist. Optically project and transfer onto.
- the exposure apparatus 120 includes the laser apparatus 1 described above, an irradiation optical system (illumination optical system) 121, a mask support base 123 that supports a photomask 122, a projection optical system 124, and an exposure object.
- a mounting table 126 for mounting and holding a semiconductor wafer 125, which is a photosensitive object, and a driving device 127 for horizontally moving the mounting table 126 are provided.
- the output light output from the laser apparatus 1 described above is input to an irradiation optical system 121 including a plurality of lenses, and passes through the photomask 122 supported by a mask support base 123. Irradiate the entire surface.
- the laser apparatus 1 and the irradiation optical system 121 constitute a light irradiation apparatus that irradiates a photomask 122 that is an object.
- the light irradiated in this way and passed through the photomask 122 has an image of a device pattern drawn on the photomask 122, and this light was placed on the mounting table 126 via the projection optical system 124.
- a predetermined position of the semiconductor wafer 125 is irradiated. At this time, the image of the device pattern of the photomask 122 is reduced on the semiconductor wafer 125 by the projection optical system 124 and imaged and exposed.
- the possibility of occurrence of fiber fusion can be reduced.
- the semiconductor device includes a step of performing device function / performance design, a step of forming a wafer from a silicon material, and a photomask by the exposure apparatus 120 according to the third embodiment. It is manufactured through a lithography process including a process of exposing the semiconductor wafer 125 via 122, a process of forming a circuit pattern such as etching, a device assembly process (including a dicing process, a bonding process, and a package process), an inspection process, and the like.
- the present invention can be applied not only to an exposure apparatus for manufacturing a semiconductor device but also to an exposure apparatus for manufacturing various other devices.
- FIG. 7 is a schematic configuration diagram showing a mask defect inspection apparatus 130 as an inspection object inspection apparatus according to a fourth embodiment of the present invention.
- the mask defect inspection apparatus 130 optically projects a device pattern precisely drawn on the photomask 132 onto a TDI sensor (Time Delay and Integration) 136, and outputs a sensor image and a predetermined reference image. And the pattern defect is extracted from the difference.
- TDI sensor Time Delay and Integration
- the mask defect inspection apparatus 130 includes the laser apparatus 1 according to the first embodiment, the illumination optical system 131, a mask support base 133 that supports the photomask 132, and a drive device 134 that horizontally moves the mask support base 133.
- the projection optical system 135 and the TDI sensor 136 are provided.
- the output light output from the laser apparatus 1 described above is input to an illumination optical system 131 composed of a plurality of lenses, and is passed through the photo supported by the mask support base 133.
- a predetermined area of the mask 132 is irradiated.
- the light irradiated in this way and passed through the photomask 132 has an image of a device pattern drawn on the photomask 132, and this light passes through the projection optical system 135 to a predetermined position of the TDI sensor 136. Imaged.
- the horizontal movement speed of the mask support base 133 and the transfer clock of the TDI sensor 136 are synchronized.
- the possibility of occurrence of fiber diffusion can be reduced.
- the first embodiment other rare earth-doped fiber resonators or fiber amplifiers may be used instead of the EDFAs 22A, 22B, and 22C.
- a semiconductor laser such as an Er-YAG laser may be used as the excitation light source.
- the wavelength of the output light output from the laser device 1 is not limited to 193.4 nm.
- or 4th embodiment was mentioned as an apparatus using the laser apparatus 1 by this invention, the laser apparatus 1 by this invention can be used in another various apparatus.
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Abstract
Description
fusionが発生する可能性をより一層低減することができるレーザ装置、並びに、このようなレーザ装置を用いた光治療装置、露光装置、デバイス製造方法及び被検物検査装置を提供することを目的とする。
2 励起光源側装置
3 光増幅部側装置
4A,4B,4C,4Aa,4Ba,4Ca,4Ab,4Bb,4Cb 光ファイバ
4Ac,4Bc,4Cc 接続部
61A,61B,61C レーザユニット
62 中央制御部
52A,52B,52C 検出器(モニタ部)
20 光増幅部
30 波長変換部
80 光治療装置
120 露光装置
130 マスク欠陥検査装置
Claims (8)
- 励起光源と、途中に接続部を持つ光ファイバを介して前記励起光源から出力される励起光を受けて光増幅を行う光増幅部とを有し、前記光増幅部から出力される光又はその光に基づく光を出力光として出力するレーザ装置であって、
前記励起光源を制御する制御部と、
前記励起光源から前記光ファイバを介して前記光増幅部側に伝送されてきた励起光のパワーレベルをモニタするモニタ部と、
を備え、
前記制御部は、前記励起光源の励起光出力開始当初において前記励起光源に所定パワーレベルの励起光を出力させた後に、前記励起光源から前記所定パワーレベルの励起光が出力されている際に前記モニタ部によりモニタされたパワーレベルが所定値よりも高い場合に、前記励起光源に前記所定パワーレベルよりも高いパワーレベルの励起光を出力させる一方、前記励起光源から前記所定パワーレベルの励起光が出力されている際に前記モニタ部によりモニタされたパワーレベルが前記所定値以下である場合に、前記励起光源に励起光の出力を停止させるように、前記励起光源を制御する、
ことを特徴とするレーザ装置。 - 前記制御部は、前記励起光源が前記所定パワーレベルよりも高いパワーレベルの励起光を出力している際に、前記モニタ部によりモニタされたパワーレベルが所定値以下となった場合に、前記励起光源に励起光の出力を停止させるように、前記励起光源を制御することを特徴とする請求項1記載のレーザ装置。
- 励起光源と、光ファイバを介して前記励起光源から出力される励起光を受けて光増幅を行う光増幅部とを有し、前記光増幅部から出力される光又はその光に基づく光を出力光として出力するレーザ装置であって、
前記励起光源を制御する制御部と、
前記励起光源から前記光ファイバを介して前記光増幅部側に伝送されてきた励起光のパワーレベルをモニタするモニタ部と、
を備え、
前記制御部は、前記励起光源が励起光を出力している際に、前記モニタ部によりモニタされたパワーレベルが所定値以下となった場合に、前記励起光源に励起光の出力を停止させるように、前記励起光源を制御することを特徴とするレーザ装置。 - 前記光増幅部から出力された光を所定波長の光に変換する波長変換部を備え、波長変換部から出力された光を前記出力光として出力することを特徴とする請求項1乃至3のいずれかに記載のレーザ装置。
- 請求項1乃至4のいずれかに記載のレーザ装置と、
前記レーザ装置から出力される出力光を治療部位に導いて照射させる照射光学系と、
を備えたことを特徴とする光治療装置。 - マスクのパターンを感光物体上に転写する露光装置であって、
請求項1乃至4のいずれかに記載のレーザ装置と、
前記レーザ装置から出力される出力光を前記マスクに照射する照明光学系と、
前記マスクからの光を前記感光物体に投影する投影光学系と、
を備えたことを特徴とする露光装置。 - リソグラフィ工程を含むデバイス製造方法であって、
前記リソグラフィ工程では、請求項6記載の露光装置を用いて前記マスクのパターンを前記感光物体に転写することを特徴とするデバイス製造方法。 - 請求項1乃至4のいずれかに記載のレーザ装置と、
被検物を保持する支持部と、
前記被検物の投影像を検出する検出器と、
前記レーザ装置から出力される出力光を前記被検物に照射する照明光学系と、
前記被検物からの光を前記検出器に投影する投影光学系と、
を備えたことを特徴とする被検物検査装置。
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JP2013007931A (ja) * | 2011-06-24 | 2013-01-10 | Nikon Corp | レーザ装置、露光装置及び検査装置 |
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US9687669B2 (en) | 2011-11-09 | 2017-06-27 | John Stephan | Wearable light therapy apparatus |
US9352170B1 (en) | 2012-01-31 | 2016-05-31 | Christina Davis | Spectral light therapy for autism spectral disorders |
US10737107B2 (en) * | 2014-04-08 | 2020-08-11 | Ori Ledany | LED-laser biomagnetic wave therapy device |
US20190083809A1 (en) | 2016-07-27 | 2019-03-21 | Z2020, Llc | Componentry and devices for light therapy delivery and methods related thereto |
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AU6865300A (en) | 1999-09-10 | 2001-04-17 | Nikon Corporation | Light source and wavelength stabilization control method, exposure apparatus andexposure method, method for producing exposure apparatus, and device manufactur ing method and device |
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EP1215527B1 (en) * | 2000-08-30 | 2006-10-04 | Fujitsu Limited | Light amplifier using raman amplification and control method thereof |
NZ518704A (en) * | 2002-05-03 | 2004-11-26 | Auckland Uniservices Ltd | Connector set where the pins are angled, such that a pull force on the cables result in a stronger connection |
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2009
- 2009-08-18 KR KR1020117006318A patent/KR101650212B1/ko active IP Right Grant
- 2009-08-18 WO PCT/JP2009/003916 patent/WO2010023841A1/ja active Application Filing
- 2009-08-18 JP JP2010526520A patent/JP5246262B2/ja active Active
- 2009-08-25 TW TW98128446A patent/TWI470889B/zh active
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2011
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JPH11312848A (ja) * | 1998-02-27 | 1999-11-09 | Fujitsu Ltd | 光増幅器 |
JP2003318472A (ja) * | 2002-04-24 | 2003-11-07 | Mitsubishi Cable Ind Ltd | 電気光学複合機器 |
WO2004054050A1 (ja) * | 2002-12-10 | 2004-06-24 | Nikon Corporation | 紫外光源、紫外光源を用いた光治療装置、および紫外光源を用いた露光装置 |
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JP2013007931A (ja) * | 2011-06-24 | 2013-01-10 | Nikon Corp | レーザ装置、露光装置及び検査装置 |
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US20110143286A1 (en) | 2011-06-16 |
JP5246262B2 (ja) | 2013-07-24 |
KR20110069782A (ko) | 2011-06-23 |
US9160132B2 (en) | 2015-10-13 |
KR101650212B1 (ko) | 2016-08-22 |
TW201014092A (en) | 2010-04-01 |
TWI470889B (zh) | 2015-01-21 |
JPWO2010023841A1 (ja) | 2012-01-26 |
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