WO2023032706A1 - レーザーリフトオフ用の積層基板、基板処理方法、及び基板処理装置 - Google Patents
レーザーリフトオフ用の積層基板、基板処理方法、及び基板処理装置 Download PDFInfo
- Publication number
- WO2023032706A1 WO2023032706A1 PCT/JP2022/031324 JP2022031324W WO2023032706A1 WO 2023032706 A1 WO2023032706 A1 WO 2023032706A1 JP 2022031324 W JP2022031324 W JP 2022031324W WO 2023032706 A1 WO2023032706 A1 WO 2023032706A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- layer
- insulating layer
- laser beam
- electrode
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 129
- 238000003672 processing method Methods 0.000 title claims description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 45
- 229920005591 polysilicon Polymers 0.000 claims abstract description 45
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims 2
- 239000012535 impurity Substances 0.000 description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- 238000000231 atomic layer deposition Methods 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 239000000370 acceptor Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- 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
- 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
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02164—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon oxide, e.g. SiO2
-
- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
-
- 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
- H01L21/683—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 for supporting or gripping
- H01L21/687—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68742—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a lifting arrangement, e.g. lift pins
Definitions
- the present disclosure relates to a laminated substrate for laser lift-off, a substrate processing method, and a substrate processing apparatus.
- Non-Patent Document 1 When forming a device layer on a substrate such as a silicon wafer, plasma CVD (Chemical Vapor Deposition), plasma ALD (Atomic Layer Deposition), plasma etching, or the like is used. Accumulation of charged particles caused by plasma irradiation damages the device layer. Therefore, it has been proposed to form a discharge path so that the device layer is not damaged (see, for example, Non-Patent Document 1).
- One aspect of the present disclosure provides a technique for suppressing irradiation of a device layer with a laser beam through a discharge path and suppressing damage to the device layer.
- a laminated substrate for laser lift-off includes a first substrate that transmits a laser beam, a first insulating layer that absorbs the laser beam, a first polysilicon layer that transmits the laser beam, and the laser beam.
- a second insulating layer that absorbs, a second polysilicon layer that transmits the laser beam, and a first device layer are provided in that order.
- the laminated substrate includes: a first electrode penetrating the first insulating layer and electrically connecting the first substrate and the first polysilicon layer; a second electrode electrically connecting the silicon layer and the second polysilicon layer.
- the first electrode and the second electrode contain a material that transmits the laser beam, and are separated from each other without overlapping in plan view.
- the present disclosure it is possible to suppress the irradiation of the device layer with the laser beam through the discharge path, thereby suppressing damage to the device layer.
- FIG. 1 is a cross-sectional view showing a laminated substrate according to one embodiment.
- FIG. 2 is a cross-sectional view showing formation of a separation starting point by the substrate processing apparatus according to one embodiment.
- FIG. 3 is a cross-sectional view showing an example of the arrangement of separation starting points.
- FIG. 4 is a cross-sectional view showing separation by the substrate processing apparatus according to one embodiment.
- FIG. 5 is a cross-sectional view showing a laminated substrate according to a first modified example.
- FIG. 6 is a diagram showing an example of the relationship between the thickness of the first insulating layer and the energy of the laser beam required to form the separation starting point.
- FIG. 7 is a cross-sectional view showing a laminated substrate according to a second modified example.
- planar view means viewing from a direction perpendicular to the surface of the laminated substrate 1 irradiated with the laser beam LB.
- a laminated substrate 1 for laser lift-off will be described with reference to FIG.
- the laminated substrate 1 includes, for example, a first substrate 11, a first insulating layer 12, a first polysilicon layer 13, a second insulating layer 14, a second polysilicon layer 15, a first device layer 16, are prepared in this order.
- Laser lift-off which will be described later in detail, is a technique for separating the first substrate 11 from the first device layer 16 using a laser beam LB that passes through the first substrate 11, as shown in FIGS.
- the first substrate 11 is, for example, a silicon wafer.
- the first substrate 11 is not limited to a silicon wafer, and may be a compound semiconductor wafer or a glass substrate.
- a first insulating layer 12, a first polysilicon layer 13, a second insulating layer 14, a second polysilicon layer 15, and a first device layer 16 are formed in this order on one side of the first substrate 11. be done. After that, a first bonding layer 17, which will be described later, may be formed.
- the first insulating layer 12 absorbs the laser beam LB and forms a separation starting point 12a.
- a crack is formed at the separation starting point 12a due to shear stress or the like.
- a modified layer obtained by modifying the first insulating layer 12 may be formed at the separation starting point 12a.
- the separation starting point 12 a is formed at the interface between the first substrate 11 and the first insulating layer 12 , but may be formed inside the first insulating layer 12 .
- the first insulating layer 12 has insulating properties. Insulating materials are excellent in absorbing the laser beam LB.
- the first insulating layer 12 is, for example, an oxide layer.
- a specific example of the oxide layer is a silicon oxide layer.
- the oxide layer is formed by a thermal oxidation method, a CVD (Chemical Vapor Deposition) method, an ALD (Atomic Layer Deposition) method, or the like.
- TEOS Tetra Ethoxy Silane
- the first insulating layer 12 may be a silicon nitride layer, a silicon carbonitride layer, or the like.
- a through hole is formed in the first insulating layer 12 .
- a first electrode 18 is provided in the through hole.
- the first electrode 18 penetrates the first insulating layer 12 and electrically connects the first substrate 11 and the first polysilicon layer 13 .
- the first electrode 18 is used as part of a discharge path for discharging charged particles (eg, electrons or holes) that accumulate in the first device layer 16 during formation of the first device layer 16 to the first substrate 11 .
- Plasma CVD, plasma ALD, plasma etching, or the like is used to form the first device layer 16 . If charged particles accumulate due to plasma irradiation, the first device layer 16 will be damaged. According to this embodiment, since the first electrode 18 and the like form the discharge path, damage to the first device layer 16 can be suppressed.
- the first electrode 18 contains polysilicon, for example, and has an impurity concentration of, for example, 1.0 ⁇ 10 19 /cm 3 or more and less than 3.0 ⁇ 10 20 /cm 3 .
- Impurities dopants
- the first polysilicon layer 13 is part of the discharge path mentioned above.
- the first polysilicon layer 13 has an impurity concentration of, for example, 1.0 ⁇ 10 19 /cm 3 or more and less than 3.0 ⁇ 10 20 /cm 3 .
- Impurities can be either donors or acceptors. If the impurity concentration is 1.0 ⁇ 10 19 /cm 3 or more, the discharge property is good. If the impurity concentration is less than 3.0 ⁇ 10 20 /cm 3 , the first polysilicon layer 13 has a high transmittance with respect to the laser beam LB.
- the second insulating layer 14 absorbs the laser beam LB.
- the absorption rate of the laser beam LB in the second insulating layer 14 is, for example, 70% to 100%. It is possible to prevent the first device layer 16 from being irradiated with the high-intensity laser beam LB, so that damage to the first device layer 16 can be suppressed.
- the second insulating layer 14 has the same thickness as the first insulating layer 12, but may have a different thickness as described below.
- the second insulating layer 14 has insulating properties like the first insulating layer 12 . Insulating materials are excellent in absorbing the laser beam LB.
- the second insulating layer 14 is, for example, an oxide layer. A specific example of the oxide layer is a silicon oxide layer.
- the oxide layer is formed by a thermal oxidation method, a CVD method, an ALD method, or the like.
- the second insulating layer 14 may be a silicon nitride layer, a silicon carbonitride layer, or the like.
- a second electrode 19 is provided in the through hole.
- the second electrode 19 penetrates the second insulating layer 14 and electrically connects the first polysilicon layer 13 and the second polysilicon layer 15 .
- the second electrode 19 is part of the discharge path described above.
- the second electrode 19 contains polysilicon, for example, and has an impurity concentration of, for example, 1.0 ⁇ 10 19 /cm 3 or more and less than 3.0 ⁇ 10 20 /cm 3 . Impurities can be either donors or acceptors.
- the second polysilicon layer 15 is part of the discharge path mentioned above.
- the second polysilicon layer 15 has an impurity concentration of, for example, 1.0 ⁇ 10 19 /cm 3 or more and less than 3.0 ⁇ 10 20 /cm 3 .
- Impurities can be either donors or acceptors. If the impurity concentration is 1.0 ⁇ 10 19 /cm 3 or more, the discharge property is good. If the impurity concentration is less than 3.0 ⁇ 10 20 /cm 3 , the second polysilicon layer 15 has a high transmittance with respect to the laser beam LB.
- the first device layer 16 includes, for example, semiconductor elements.
- the first device layer 16 includes, for example, 3D NAND cells, logic cells, or DRAM cells.
- the laser beam LB after passing through the first electrode 18, is not absorbed by the second insulating layer 14, and irradiates the first device layer 16 as it is. It will be done. Since the first device layer 16 is irradiated with the high-intensity laser beam LB, the first device layer 16 is damaged.
- the laminated substrate 1 of this embodiment includes a second insulating layer 14 . Therefore, the laser beam LB is absorbed by the second insulating layer 14 after passing through the first electrode 18, as indicated by the two-dot chain line arrow in FIG. Therefore, it is possible to prevent the first device layer 16 from being irradiated with the high-intensity laser beam LB, thereby suppressing damage to the first device layer 16 . Outside the first electrode 18, the laser beam LB is absorbed by the first insulating layer 12 as indicated by the solid line arrow in FIG.
- the first polysilicon layer 13, the second polysilicon layer 15, the first electrode 18, and the second electrode 19 contain a material (for example, polysilicon) that transmits the laser beam LB. If the first electrode 18 overlaps the second electrode 19 in a plan view (viewed from above in FIG. 3), the laser beam LB passes through the first electrode 18 and then the second electrode 19. , reaches the first device layer 16 as it is.
- a material for example, polysilicon
- the first electrode 18 and the second electrode 19 are separated without overlapping. Therefore, the laser beam LB is absorbed by the second insulating layer 14 after passing through the first electrode 18, as indicated by the two-dot chain line arrow in FIG. Therefore, it is possible to prevent the first device layer 16 from being irradiated with the high-intensity laser beam LB, thereby suppressing damage to the first device layer 16 .
- the laminated substrate 1 includes a first bonding layer 17, a second bonding layer 27, a second device layer 26, a second substrate 21, and a may be provided in this order.
- the first substrate 11 and the second substrate 21 are bonded via the first device layer 16 and the second device layer 26 .
- the first bonding layer 17 is formed on the surface of the first device layer 16 .
- the first bonding layer 17 is an insulating layer such as a silicon oxide layer.
- the first bonding layer 17 may include wiring that electrically connects the first device layer 16 and the second device layer 26 .
- the first bonding layer 17 has a bonding surface 17 a in contact with the second bonding layer 27 .
- the bonding surface 17a may be activated by plasma or the like before the first bonding layer 17 and the second bonding layer 27 are opposed to each other and bonded, and may be made hydrophilic by supplying water or steam.
- the second substrate 21 is, for example, a silicon wafer.
- the second substrate 21 is not limited to a silicon wafer, and may be a compound semiconductor wafer or a glass substrate.
- a second device layer 26 and a second bonding layer 27 are formed in this order on the surface of the second substrate 21 facing the first substrate 11 .
- the second device layer 26 includes, for example, semiconductor elements.
- the second device layer 26 is electrically connected with the first device layer 16 .
- Second device layer 26 has a different function than first device layer 16 .
- the second device layer 26 contains CMOS (Complementary Metal Oxide Semiconductor) logic circuits and the first device layer 16 contains 3D NAND cells.
- CMOS Complementary Metal Oxide Semiconductor
- the second bonding layer 27, like the first bonding layer 17, is an insulating layer such as a silicon oxide layer.
- the second bonding layer 27 may include wiring that electrically connects the first device layer 16 and the second device layer 26 .
- the second bonding layer 27 has a bonding surface 27 a that contacts the first bonding layer 17 .
- the bonding surface 27a may be activated by plasma or the like, and may be made hydrophilic by supplying water or steam.
- the first bonding layer 17 and the second bonding layer 27 are bonded by van der Waals forces (intermolecular forces) and hydrogen bonds between OH groups.
- a covalent bond may be generated by a dehydration condensation reaction of a hydrogen bond. Since the solids are directly bonded together without using a liquid adhesive, misalignment due to deformation of the adhesive can be prevented. In addition, it is possible to prevent the occurrence of inclination due to uneven thickness of the adhesive.
- the laminated substrate 1 includes a first substrate 11, a first insulating layer 12, a first polysilicon layer 13, a second insulating layer 14, a second polysilicon layer 15, a first device layer 16, should be provided in this order.
- the laminated substrate 1 does not have to include the first bonding layer 17 , the second bonding layer 27 , the second device layer 26 and the second substrate 21 .
- the substrate processing apparatus 3 separates the first substrate 11 from the first device layer 16 using a laser beam LB that passes through the first substrate 11 .
- the substrate processing apparatus 3 includes, for example, a first substrate holding section 31, an irradiator 32, a first driving section 33, a second substrate holding section 34, a second driving section 35, and a control section 39. .
- the first substrate holding part 31 holds the laminated substrate 1 as shown in FIG.
- the first substrate holding part 31 holds the laminated substrate 1 horizontally from below, for example, with the first substrate 11 facing upward.
- the first substrate holder 31 is, for example, a vacuum chuck.
- the first driving section 33 moves the first substrate holding section 31 in the horizontal direction and rotates it about a vertical rotation axis.
- the first driving section 33 may move the first substrate holding section 31 in the vertical direction.
- the irradiator 32 irradiates the laminated substrate 1 held by the first substrate holding portion 31 with the laser beam LB.
- the laser beam LB is, for example, infrared rays and has a wavelength of, for example, 8.8 ⁇ m to 11 ⁇ m.
- the silicon wafer that is the first substrate 11 has high infrared transmittance, and the first insulating layer 12 has high infrared absorption.
- a peeling starting point 12 a is formed at the irradiation point of the laser beam LB on the first insulating layer 12 .
- the irradiator 32 includes an oscillator that oscillates the laser beam LB.
- the oscillator pulse-oscillates the laser beam LB.
- the oscillator is for example a CO2 laser.
- the wavelength of the CO2 laser is about 9.3 ⁇ m.
- Illuminator 32 may include a condenser lens. The condensing lens converges the laser beam LB toward the laminated substrate 1 .
- the irradiator 32 may include a galvanometer scanner or a polygon scanner in order to move the irradiation point of the laser beam LB on the laminated substrate 1.
- the first driving unit 33 may move the irradiation point of the laser beam LB on the laminated substrate 1 by moving the first substrate holding unit 31 in the horizontal direction or rotating it about the vertical rotation axis. . In this case, a galvanometer scanner or the like is unnecessary.
- the second substrate holding part 34 holds the laminated substrate 1 as shown in FIG.
- the second substrate holding part 34 holds the laminated substrate 1 from the side opposite to the first substrate holding part 31 (for example, from above).
- the second substrate holding part 34 is, for example, a vacuum chuck.
- the second driving section 35 moves the second substrate holding section 34 in the horizontal direction and rotates it about the vertical rotation axis.
- the second driving section 35 may move the second substrate holding section 34 in the vertical direction.
- the control unit 39 is, for example, a computer, and includes a CPU (Central Processing Unit) 391 and a storage medium 392 such as a memory.
- the storage medium 392 stores programs for controlling various processes executed in the substrate processing apparatus 3 .
- the control unit 39 controls the operation of the substrate processing apparatus 3 by causing the CPU 391 to execute programs stored in the storage medium 392 .
- the control unit 39 controls the irradiator 32 and the first driving unit 33 to form the separation starting point 12 a at the interface between the first substrate 11 and the first insulating layer 12 .
- a large number of peeling starting points 12 a are formed at intervals in the radial direction and the circumferential direction of the first substrate 11 .
- the plurality of separation starting points 12a may be arranged concentrically or spirally. Note that the separation starting point 12a may be formed inside the first insulating layer 12 as described above.
- control unit 39 controls the second driving unit 35 to control the peeling of the first substrate 11 from the first device layer 16 .
- the second driving section 35 raises the second substrate holding section 34 while the first substrate holding section 31 sucks the second substrate 21 and the second substrate holding section 34 holds the first substrate 11 .
- a crack connecting the plurality of separation starting points 12a in a plane is formed, and the first substrate 11 and the first device layer 16 are separated.
- control section 39 may lower the first substrate holding section 31 instead of or in addition to raising the second substrate holding section 34 .
- the control unit 39 may relatively separate the first substrate holding unit 31 and the second substrate holding unit 34 in the vertical direction.
- the controller 39 may rotate the first substrate holder 31 or the second substrate holder 34 .
- the thickness t1 of the first insulating layer 12 may be greater than the thickness t2 of the second insulating layer .
- a thickness t1 of the first insulating layer 12 is, for example, greater than 1.0 ⁇ m.
- the thickness t2 of the second insulating layer 14 is, for example, 0.5 ⁇ m to 1.0 ⁇ m.
- FIG. 6 shows an example of the relationship between the thickness t1 of the first insulating layer 12 and the energy E of the laser beam LB required to form the separation starting point 12a.
- the laser beam LB with a small energy E can not only form the peeling starting point 12a in the first insulating layer 12, but also It is possible to suppress the formation of a peeling starting point at 14 and suppress the occurrence of peeling at an unintended position.
- the magnitude relationship between the thickness t1 of the first insulating layer 12 and the thickness t2 of the second insulating layer 14 may be reversed, and the thickness t2 of the second insulating layer 14 may be greater than the thickness t1 of the first insulating layer 12.
- the separation starting point 12 a is formed at the interface between the first polysilicon layer 13 and the second insulating layer 14 or inside the second insulating layer 14 .
- the laminated substrate 1 may have a conductive layer 41 between the second insulating layer 14 and the second polysilicon layer 15 that reflects the laser beam LB.
- the reflectance of the laser beam LB on the conductive layer 41 is, for example, 70% to 100%.
- Conductive layer 41 is part of the discharge path described above.
- Conductive layer 41 includes, for example, a transition metal, a conductive oxide, or polysilicon.
- Transition metals include, for example, at least one selected from the group consisting of Cu, Co, Ru, Mo, W, and Ti.
- Conductive oxides include, for example, IGZO (an oxide containing indium, gallium, and zinc), or ITO (indium tin oxide).
- Polysilicon contained in the conductive layer 41 has an impurity concentration higher than that of the second polysilicon layer 15, for example, 3.0 ⁇ 10 20 /cm 3 or more and 3.0 ⁇ 10 21 /cm 3 or less. have.
- the conductive layer 41 can reduce the intensity of the laser beam LB reaching the first device layer 16 and reliably suppress damage to the first device layer 16 .
- first substrate 12 first insulating layer 13 first polysilicon layer 14 second insulating layer 15 second polysilicon layer 16 first device layer 18 first electrode 19 second electrode LB laser beam
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Drying Of Semiconductors (AREA)
- Laser Beam Processing (AREA)
- Recrystallisation Techniques (AREA)
Abstract
Description
11 第1基板
12 第1絶縁層
13 第1ポリシリコン層
14 第2絶縁層
15 第2ポリシリコン層
16 第1デバイス層
18 第1電極
19 第2電極
LB レーザー光線
Claims (8)
- レーザーリフトオフ用の積層基板であって、
レーザー光線を透過する第1基板と、前記レーザー光線を吸収する第1絶縁層と、前記レーザー光線を透過する第1ポリシリコン層と、前記レーザー光線を吸収する第2絶縁層と、前記レーザー光線を透過する第2ポリシリコン層と、第1デバイス層と、をこの順番で備え、
前記第1絶縁層を貫通して前記第1基板と前記第1ポリシリコン層とを電気的に接続する第1電極と、前記第2絶縁層を貫通して前記第1ポリシリコン層と前記第2ポリシリコン層とを電気的に接続する第2電極と、を備え、
前記第1電極と前記第2電極は、前記レーザー光線を透過する材料を含み、平面視にて重なることなく離れている、レーザーリフトオフ用の積層基板。 - 前記第1電極と前記第2電極は、ポリシリコンを含む、請求項1に記載のレーザーリフトオフ用の積層基板。
- 前記第1絶縁層と前記第2絶縁層は、一方の厚みが他方の厚みよりも大きい、請求項1又は2に記載のレーザーリフトオフ用の積層基板。
- 前記第2絶縁層と前記第2ポリシリコン層との間に、前記レーザー光線を反射する導電層を更に備える、請求項1又は2に記載のレーザーリフトオフ用の積層基板。
- 前記第1絶縁層と前記第2絶縁層は、シリコン酸化層である、請求項1又は2に記載のレーザーリフトオフ用の積層基板。
- 前記第1デバイス層と電気的に接続される第2デバイス層と、前記第2デバイス層が形成される第2基板と、を備え、
前記第1基板と前記第2基板は、前記第1デバイス層と前記第2デバイス層を介して接合されている、請求項1又は2に記載のレーザーリフトオフ用の積層基板。 - 請求項1又は2に記載のレーザーリフトオフ用の積層基板を準備することと、
前記第1基板を介して前記レーザー光線を前記第1絶縁層に照射することで、前記第1基板と前記第1絶縁層の界面、前記第1絶縁層の内部、前記第1ポリシリコン層と前記第2絶縁層の界面、又は前記第2絶縁層の内部に剥離起点を形成することを有する、基板処理方法。 - 請求項1又は2に記載のレーザーリフトオフ用の積層基板を保持する基板保持部と、
前記基板保持部で保持されている前記積層基板に対して、前記レーザー光線を照射する照射器と、
前記照射器を制御する制御部と、
を備え、
前記制御部は、前記第1基板を介して前記レーザー光線を前記第1絶縁層に照射することで、前記第1基板と前記第1絶縁層の界面、前記第1絶縁層の内部、前記第1ポリシリコン層と前記第2絶縁層の界面、又は前記第2絶縁層の内部に剥離起点を形成する制御を行う、基板処理装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280057262.4A CN117836903A (zh) | 2021-09-02 | 2022-08-19 | 激光剥离用的层叠基板、基板处理方法以及基板处理装置 |
JP2023545446A JPWO2023032706A1 (ja) | 2021-09-02 | 2022-08-19 | |
KR1020247009730A KR20240046917A (ko) | 2021-09-02 | 2022-08-19 | 레이저 리프트 오프용의 적층 기판, 기판 처리 방법 및 기판 처리 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021142969 | 2021-09-02 | ||
JP2021-142969 | 2021-09-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023032706A1 true WO2023032706A1 (ja) | 2023-03-09 |
Family
ID=85412240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/031324 WO2023032706A1 (ja) | 2021-09-02 | 2022-08-19 | レーザーリフトオフ用の積層基板、基板処理方法、及び基板処理装置 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPWO2023032706A1 (ja) |
KR (1) | KR20240046917A (ja) |
CN (1) | CN117836903A (ja) |
TW (1) | TW202338911A (ja) |
WO (1) | WO2023032706A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003163323A (ja) * | 2001-11-27 | 2003-06-06 | Sony Corp | 回路モジュール及びその製造方法 |
WO2021131711A1 (ja) * | 2019-12-26 | 2021-07-01 | 東京エレクトロン株式会社 | 基板処理方法及び基板処理装置 |
JP2021106197A (ja) * | 2019-12-26 | 2021-07-26 | 東京エレクトロン株式会社 | 基板処理装置及び基板処理方法 |
JP2021114534A (ja) * | 2020-01-17 | 2021-08-05 | 凸版印刷株式会社 | 配線基板および配線基板の製造方法 |
-
2022
- 2022-08-19 CN CN202280057262.4A patent/CN117836903A/zh active Pending
- 2022-08-19 WO PCT/JP2022/031324 patent/WO2023032706A1/ja active Application Filing
- 2022-08-19 JP JP2023545446A patent/JPWO2023032706A1/ja active Pending
- 2022-08-19 KR KR1020247009730A patent/KR20240046917A/ko unknown
- 2022-08-23 TW TW111131606A patent/TW202338911A/zh unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003163323A (ja) * | 2001-11-27 | 2003-06-06 | Sony Corp | 回路モジュール及びその製造方法 |
WO2021131711A1 (ja) * | 2019-12-26 | 2021-07-01 | 東京エレクトロン株式会社 | 基板処理方法及び基板処理装置 |
JP2021106197A (ja) * | 2019-12-26 | 2021-07-26 | 東京エレクトロン株式会社 | 基板処理装置及び基板処理方法 |
JP2021114534A (ja) * | 2020-01-17 | 2021-08-05 | 凸版印刷株式会社 | 配線基板および配線基板の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2023032706A1 (ja) | 2023-03-09 |
KR20240046917A (ko) | 2024-04-11 |
CN117836903A (zh) | 2024-04-05 |
TW202338911A (zh) | 2023-10-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9269561B2 (en) | Wafer debonding using long-wavelength infrared radiation ablation | |
JP5423880B2 (ja) | 放射線検出器およびそれを製造する方法 | |
TWI240965B (en) | Semiconductor wafer dividing method and apparatus | |
JP5967211B2 (ja) | 半導体デバイスの製造方法 | |
WO2016103846A1 (ja) | 半導体装置及び半導体装置の製造方法 | |
TW201312633A (zh) | 用於防治半導體層中的缺陷之方法 | |
WO2007055010A1 (ja) | 半導体装置の製造方法および半導体装置 | |
CN1674223A (zh) | 半导体器件及其制造方法 | |
JP2014053510A (ja) | 端面加工方法及び端面加工装置 | |
TWI816969B (zh) | 載板移除方法 | |
US12040190B2 (en) | Semiconductor manufacturing method and manufacturing device of edge laser removal of combined substrate | |
CN106409732B (zh) | 一种利用uv实现晶圆与玻璃分离的方法 | |
WO2023032706A1 (ja) | レーザーリフトオフ用の積層基板、基板処理方法、及び基板処理装置 | |
TWI675412B (zh) | 半導體裝置及其製造方法 | |
JP2023036132A (ja) | レーザーリフトオフ用の積層基板、基板処理方法、及び基板処理装置 | |
US20200402794A1 (en) | Silicon doping for laser splash blockage | |
WO2022190914A1 (ja) | 半導体チップの製造方法、及び基板処理装置 | |
TWI699009B (zh) | Led基板之形成方法 | |
JP2010021171A (ja) | 半導体装置の製造方法およびそれに用いる半導体製造装置 | |
JP2010021466A (ja) | 基板接合方法及び電子部品 | |
WO2023032833A1 (ja) | 基板処理方法及び基板処理装置 | |
TWI242288B (en) | Semiconductor device | |
US20240304494A1 (en) | Method of manufacturing semiconductor device, method for separating substrate, and substrate processing apparatus | |
US20240355669A1 (en) | Substrate processing method and substrate processing apparatus | |
JP7262903B2 (ja) | キャリア板の除去方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22864290 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023545446 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280057262.4 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18688382 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20247009730 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22864290 Country of ref document: EP Kind code of ref document: A1 |