WO2021131711A1 - 基板処理方法及び基板処理装置 - Google Patents
基板処理方法及び基板処理装置 Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims abstract description 116
- 238000003672 processing method Methods 0.000 title claims description 18
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000010521 absorption reaction Methods 0.000 claims description 173
- 230000003287 optical effect Effects 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000002238 attenuated effect Effects 0.000 claims description 2
- 235000012431 wafers Nutrition 0.000 description 236
- 230000003028 elevating effect Effects 0.000 description 19
- 238000004140 cleaning Methods 0.000 description 18
- 230000001678 irradiating effect Effects 0.000 description 15
- 230000001965 increasing effect Effects 0.000 description 11
- 239000004065 semiconductor Substances 0.000 description 11
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910002601 GaN Inorganic materials 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 2
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/7806—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices involving the separation of the active layers from a substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0823—Devices involving rotation of the workpiece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/57—Working by transmitting the laser beam through or within the workpiece the laser beam entering a face of the workpiece from which it is transmitted through the workpiece material to work on a different workpiece face, e.g. for effecting removal, fusion splicing, modifying or reforming
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67092—Apparatus for mechanical treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67115—Apparatus for thermal treatment mainly by radiation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/005—Processes
- H01L33/0093—Wafer bonding; Removal of the growth substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/40—Semiconductor devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
- B23K2103/56—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26 semiconducting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/268—Bombardment with radiation with high-energy radiation using electromagnetic radiation, e.g. laser radiation
Definitions
- the processing block 30 has a laser irradiation device 31 and a cleaning device 32.
- the laser irradiation device 31 irradiates the laser absorption layer P of the second wafer W2 with laser light.
- the configuration of the laser irradiation device 31 will be described later.
- the irradiation start position of the laser beam L is preferably between the outer peripheral edge Ea of the second wafer W2 and the junction end Eb of the first wafer W1 and the second wafer W2 in the polymerization wafer T.
- the eccentricity is absorbed and the laser beam L is applied to the laser absorption layer P. It can be irradiated appropriately.
- the laser light L is irradiated to the laser absorption layer P. Since the laser beam L is irradiated in a pulsed manner, the peak power of the laser beam L can be increased. Therefore, as described with reference to FIG. 1, peeling can occur at the interface between the laser absorption layer P and the second wafer W2, and the second wafer W2 is appropriately peeled from the laser absorption layer P. be able to.
- the first wafer W1 that has been subjected to all the processing is transferred to the cassette Cw1 of the cassette mounting table 11 by the wafer transfer device 22. In this way, a series of wafer processing in the wafer processing system 1 is completed.
- the laser light L is irradiated to the laser absorption layer P in a pulse shape, so that the peak power of the laser light L can be increased, and as a result, the laser absorption Peeling can occur at the interface between the layer P and the second wafer W2.
- the heat effect is small as compared with the case where a continuous wave is used, and stable laser lift-off can be performed. Therefore, the second wafer W2 can be appropriately peeled from the laser absorption layer P, and the device layer D2 can be transferred to the first wafer W1.
- the frequency of the laser beam L1 oscillated from the laser oscillator 130 is not changed, the pulse waveform of the laser beam L1 does not change, and the pulse waveform of the laser beam L2 can be the same as the pulse waveform of the laser beam L1. Therefore, the frequency of the laser beam L2 can be easily adjusted, the conventional complicated adjustment as described above becomes unnecessary, and the process control of the laser processing becomes easy.
- the output of the laser beam L1 from the laser oscillator 130 was 40 W, it was not necessary to adjust the output for the energy of 400 ⁇ J required for peeling.
- the output of the laser beam L1 may be attenuated by 20% in the attenuator 132 to adjust the output.
- the laser head 22 for example, galvano is used.
- a plurality of galvano mirrors (not shown) are arranged inside the laser head 221.
- an f ⁇ lens is used for the lens 223.
- the laser beam L input to the laser head 221 is reflected by the galvano mirror, propagated to the lens 223 via the optical system 222, transmitted through the second wafer W2, and irradiates the laser absorption layer P. Will be done.
- the angle of the galvano mirror the laser beam L can be scanned by the laser absorption layer P.
- the chuck 210 is moved so as to be displaced in the Y-axis direction, and the irradiation and scanning of the laser beam L and the movement of the chuck 210 are repeated in the same manner as described above to irradiate the laser beam L in a row in the X-axis direction. To do. Then, the laser beam L is applied to the laser absorption layer P.
- the same effects as those in the above embodiment can be enjoyed. That is, since the laser beam L is irradiated to the laser absorption layer P in a pulse shape, peeling can be appropriately caused at the interface between the laser absorption layer P and the second wafer W2. Moreover, since the irradiation and scanning of the laser beam L are not stopped in a row in the X-axis direction, the processing time of the laser irradiation can be shortened and the throughput can be further improved.
- a guide portion 240 and a holding member 250 may be provided on the upper surface of the chuck 100.
- both the guide portion 240 and the holding member 250 are provided in the present embodiment, only the guide portion 240 may be provided or only the holding member 250 may be provided.
- the vertical portion 241 can suppress the misalignment and slippage of the second wafer W2.
- the guide portion 240 becomes useful.
- both the guide portion 240 and the holding member 250 are provided, the effect of centering the polymerized wafer T and preventing the misalignment and slipping of the second wafer W2 is enhanced.
- the interface between the laser absorption layer P and the second wafer W2 is irradiated with the laser beam L to peel off the second wafer W2 from the laser absorption layer P.
- the laser absorption layer P may be peeled off so as to remain on the second wafer W2.
- the same effects as those in the above embodiment can be enjoyed. That is, since the laser light L is irradiated to the laser absorption layer P in a pulse shape, the peak power of the laser light L can be increased, and as a result, the laser light L can be appropriately at the interface between the laser absorption layer P and the device layer D2. Peeling can occur. Moreover, the laser absorbing layer P remaining on the second wafer W2 is an oxide film (SiO 2 film), and this laser absorbing layer P is applied to the second wafer W2, for example, in a subsequent semiconductor manufacturing process. It can be used as an oxide film (insulating film) when producing Silicon Via).
- the device layer D2 and the surface film F2 are formed on the surface of the laser absorption layer P1.
- the device layer D2 and the surface film F2 are formed by a normal front end of line (FEOL) or back end of line (BEOL).
- the peeling position of the laser absorption layer P1 is adjusted in the same manner as in the case shown in FIG. 24 by adjusting the absorption position of the laser beam L, that is, the peeling position of the laser absorption layer P1 to be the second wafer. Peeling may occur at the interface between W2 and the laser absorption layer P1.
- the first wafer W1 and the second wafer W2 are joined.
- a device layer D1 and a surface film F1 are formed on the surface W1a of the first wafer W1, and the surface film F1 and the surface film F2 are bonded to each other.
- the laser beam L reflected by the reflective film R is absorbed by the laser absorption layer P. Therefore, the peeling efficiency of the second wafer W2 can be improved.
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Abstract
Description
100 チャック
110 レーザ照射部
D1、D2 デバイス層
P レーザ吸収層
T 重合ウェハ
W1 第1のウェハ
W2 第2のウェハ
Claims (29)
- 第1の基板と第2の基板が接合された重合基板において、前記第2の基板の表面に形成されたデバイス層を前記第1の基板に転写する方法であって、
前記第2の基板と前記デバイス層の間に形成されたレーザ吸収層に対して、当該第2の基板の裏面側からレーザ光をパルス状に照射する、基板処理方法。 - 前記重合基板を回転させつつ、前記レーザ吸収層に対して径方向外側から内側に向けて前記レーザ光を照射する、請求項1に記載の基板処理方法。
- 前記重合基板の回転速度は、前記レーザ光が前記レーザ吸収層の径方向外側に照射される場合に比べて内側に照射される場合の方が速い、請求項2に記載の基板処理方法。
- 前記レーザ吸収層の径方向外側に照射される前記レーザ光の周波数は、内側に照射される前記レーザ光の周波数よりも大きい、請求項2又は3に記載の基板処理方法。
- 前記第2の基板の外周端と、前記重合基板における前記第1の基板と前記第2の基板の接合端との間から、前記レーザ光の照射を開始する、請求項2~4のいずれか一項に記載の基板処理方法。
- 前記レーザ吸収層に対して照射される前記レーザ光を、当該レーザ吸収層で走査させることと、
前記重合基板を移動させることと、を有し、
前記レーザ光の走査と前記重合基板の移動を繰り返し行う、請求項1に記載の基板処理方法。 - 前記重合基板を移動させながら、前記レーザ吸収層に対して照射される前記レーザ光を当該レーザ吸収層で走査させる、請求項1に記載の基板処理方法。
- 前記レーザ吸収層の外周部において、前記重合基板を回転させながら前記レーザ光を照射し、
前記外周部の径方向内側の中央部において、前記重合基板の回転を停止させた状態で、前記レーザ光を走査させる、請求項1に記載の基板処理方法。 - 前記レーザ光のエネルギー密度を制御して、前記レーザ吸収層におけるレーザ光の吸光位置を調整する、請求項1~8のいずれか一項に記載の基板処理方法。
- 前記レーザ吸収層に前記レーザ光を照射する際、レーザ発振器から光学素子に向けてパルス状のレーザ光を発振し、前記光学素子においてレーザ光の周波数を調整する、請求項1~9のいずれか一項に記載の基板処理方法。
- 前記レーザ発振器からのレーザ光のパルス波形と、前記レーザ吸収層に照射されるレーザ光のパルス波形とは同じである、請求項10に記載の基板処理方法。
- 前記レーザ発振器からのレーザ光の周波数は、前記光学素子が制御できる最高周波数である、請求項10又は11に記載の基板処理方法。
- 前記レーザ吸収層に前記レーザ光を照射する際、減衰器において前記レーザ発振器からのレーザ光を減衰させる、請求項10~12のいずれか一項に記載の基板処理方法。
- 前記レーザ吸収層において、前記レーザ光の入射面と反対側の面に反射膜が形成され、
前記レーザ吸収層に照射された前記レーザ光のうち、当該レーザ吸収層で吸収されない前記レーザ光は前記反射膜で反射され、
前記反射膜で反射された前記レーザ光は、前記レーザ吸収層に吸収される、請求項1~13のいずれか一項に記載の基板処理方法。 - 第1の基板と第2の基板が接合された重合基板において、前記第2の基板の表面に形成されたデバイス層を前記第1の基板に転写する装置であって、
前記第1の基板の裏面を保持する保持部と、
前記保持部が前記第1の基板を保持した状態で、前記第2の基板と前記デバイス層の間に形成されたレーザ吸収層に対して、当該第2の基板の裏面側からレーザ光をパルス状に照射するレーザ照射部と、を有する、基板処理装置。 - 前記保持部を回転させる回転機構と、
前記回転機構と前記レーザ照射部を制御する制御部と、を有し、
前記制御部は、前記重合基板を保持する前記保持部を回転させつつ、前記レーザ吸収層に対して径方向外側から内側に向けて前記レーザ光を照射するように、前記回転機構と前記レーザ照射部を制御する、請求項15に記載の基板処理装置。 - 前記制御部は、前記レーザ吸収層に対して螺旋状に前記レーザ光を照射するように、前記回転機構と前記レーザ照射部を制御する、請求項16に記載の基板処理装置。
- 前記制御部は、前記重合基板の回転速度が、前記レーザ光を前記レーザ吸収層の径方向外側に照射する場合に比べて内側に照射する場合の方が速くなるように、前記回転機構と前記レーザ照射部を制御する、請求項16又は17に記載の基板処理装置。
- 前記制御部は、前記レーザ吸収層の径方向外側に照射される前記レーザ光の周波数が、内側に照射される前記レーザ光の周波数よりも大きくなるように、前記回転機構と前記レーザ照射部を制御する、請求項16~18のいずれか一項に記載の基板処理装置。
- 前記制御部は、前記第2の基板の外周端と、前記重合基板における前記第1の基板と前記第2の基板の接合端との間から、前記レーザ光の照射を開始するように、前記レーザ照射部を制御する、請求項16~19のいずれか一項に記載の基板処理装置。
- 前記保持部を移動させる移動機構と、
前記移動機構と前記レーザ照射部を制御する制御部と、を有し、
前記レーザ照射部は、前記レーザ吸収層に対して前記レーザ光を走査させて照射し、
前記制御部は、
前記レーザ吸収層に対して照射される前記レーザ光を、当該レーザ吸収層で走査させることと、
前記保持部を移動させることと、を順に繰り返し行うように、前記移動機構と前記レーザ照射部を制御する、請求項15に記載の基板処理装置。 - 前記保持部を移動させる移動機構と、
前記移動機構と前記レーザ照射部を制御する制御部と、を有し、
前記レーザ照射部は、前記レーザ吸収層に対して前記レーザ光を走査させて照射し、
前記制御部は、前記保持部を移動させながら、前記レーザ吸収層に対して照射される前記レーザ光を当該レーザ吸収層で走査させるように、前記移動機構と前記レーザ照射部を制御する、請求項15に記載の基板処理装置。 - 前記保持部を回転させる回転機構と、
前記保持部を移動させる移動機構と、
前記回転機構、前記移動機構及び前記レーザ照射部を制御する制御部と、を有し、
前記レーザ照射部は、前記レーザ吸収層に対して前記レーザ光を走査させて照射し、
前記制御部は、
前記レーザ吸収層の外周部において、前記重合基板を回転させながら前記レーザ光を照射し、
前記外周部の径方向内側の中央部において、前記重合基板の回転を停止させた状態で、前記レーザ光を走査させるように、前記回転機構、前記移動機構及び前記レーザ照射部を制御する、請求項15に記載の基板処理装置。 - 前記レーザ照射部を制御する制御部を有し、
前記制御部は、前記レーザ光のエネルギー密度を制御して、前記レーザ吸収層におけるレーザ光の吸光位置を調整する、請求項15~23のいずれか一項に記載の基板処理装置。 - 前記レーザ照射部を制御する制御部を有し、
前記レーザ照射部は、
レーザ光をパルス状に発振するレーザ発振器と、
前記レーザ発振器からのレーザ光を異なる方向に変向させる光学素子と、を有し、
前記制御部は、前記光学素子を制御して、前記レーザ吸収層に照射されるレーザ光の周波数を調整する、請求項15~24のいずれか一項に記載の基板処理装置。 - 前記レーザ発振器からのレーザ光のパルス波形と、前記レーザ吸収層に照射されるレーザ光のパルス波形とは同じである、請求項25に記載の基板処理装置。
- 前記レーザ発振器からのレーザ光の周波数は、前記光学素子が制御できる最高周波数である、請求項25又は26に記載の基板処理装置。
- 前記レーザ照射部は、前記レーザ発振器からのレーザ光を減衰させる減衰器を有する、請求項25~27のいずれか一項に記載の基板処理装置。
- 前記光学素子は音響光学変調器である、請求項25~28のいずれか一項に記載の基板処理装置。
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