WO2005024917A1 - 貼り合わせウェーハの製造方法 - Google Patents
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- WO2005024917A1 WO2005024917A1 PCT/JP2004/013069 JP2004013069W WO2005024917A1 WO 2005024917 A1 WO2005024917 A1 WO 2005024917A1 JP 2004013069 W JP2004013069 W JP 2004013069W WO 2005024917 A1 WO2005024917 A1 WO 2005024917A1
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- wafer
- active layer
- bonded
- insulating film
- bonded wafer
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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
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76251—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology using bonding techniques
- H01L21/76254—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology using bonding techniques with separation/delamination along an ion implanted layer, e.g. Smart-cut, Unibond
Definitions
- the present invention relates to a method for manufacturing a bonded wafer, and more particularly to a technique for manufacturing a high quality bonded wafer in which a crystal defect such as COP does not exist in an active layer wafer using a smart cut method.
- Patent Document 1 In recent years, as a method of manufacturing a semiconductor substrate having an SOI (Silicon On Insulator) structure, a smart cut method described in Patent Document 1 has been developed.
- SOI Silicon On Insulator
- the gate oxide film has become thinner and the source and drain have become shallower. For this reason, there is a strong demand for improving the withstand voltage characteristics of the gate oxide film and reducing the junction leakage current.
- the silicon growth rate when pulling a silicon single crystal ingot using the CZ method was as high as 1.0-2. Om mZmin. Therefore, a silicon wafer (hereinafter, referred to as a high-speed pulling wafer) obtained by slicing this ingot has many crystal defects such as COP (Crystal Originated Particle) and OSF (Oxidation Induced Stacking Fault).
- Patent Document 2 As a conventional method for solving such a problem, for example, a method described in Patent Document 2 is known.
- the lifting speed in the CZ method is set to 0.8 mmZmin or less.
- the interstitial silicon and vacancies taken in at the pulling interface vanish, making it possible to reduce or eliminate the density of COPs, which are aggregates of vacancies. Oxygen precipitates are less likely to be deposited in the silicon single crystal ingot because the required vacancy density decreases.
- Patent Document 1 Japanese Patent Laid-Open No. 5-211128
- Patent Document 2 Japanese Patent Application Laid-Open No. 2-267195
- a technology for manufacturing such a silicon wafer with a low speed pulling (hereinafter, referred to as a low speed pulling wafer) to a smart cut method. That is, the low-speed pulling film is used for the active layer of the bonded SOI substrate manufactured by the smart cut method. Then, a bonded SOI substrate having no crystal defects such as COP in the active layer can be obtained.
- a p-type active layer wafer having a boron concentration of about 1 ⁇ 10 16 at O msZcm 3 is inserted into a thermal oxidation furnace, and a silicon oxide film is formed on the active layer wafer.
- the rate of formation of silicon phosphorylation film was about 4 5 X 10- 4 ⁇ mZmin (heating temperature 1000 ° C: de Lai oxygen oxidation).
- hydrogen was ion-implanted into the active layer wafer, ion implantation damage occurred in the active layer wafer, and the quality of the active layer was degraded.
- a bonded wafer having an active layer and having no crystal defects can be manufactured at low cost and high throughput. Also, a method of manufacturing a bonded substrate that can reduce damage to the active layer due to ion implantation, improve the quality of the active layer, and shorten the formation time of the buried insulating film. Its purpose is to provide.
- the first invention provides an epitaxy growth step of growing an epitaxy layer containing boron on an active layer wafer, and an insulation film formation step of forming an insulation film on the surface of the epitaxy layer. After the formation of the insulating film, an ion implantation step of ion-implanting a light element into a predetermined depth position of the epitaxy layer to form an ion implantation region, and after the ion implantation, the active layer wafer and the support are formed.
- a wafer is bonded with the insulating film interposed therebetween, a bonding step of forming a bonded wafer, and a heat treatment of the bonded wafer to form a light element bubble in the ion-implanted region.
- a method for manufacturing a bonded wafer comprising a step of peeling a part of the active layer wafer from a predetermined depth position to form an active layer.
- the active layer forming a part of the epitaxy layer is left on the supporting wafer side via the buried insulating film, and the remaining epitaxy layer is peeled off together with the active layer wafer. Therefore, the active layer is a layer obtained by epitaxial growth without any crystal defects.
- a bonded wafer with an active layer with no crystal defects was removed by using a high-speed wafer with a higher throughput and a higher yield than conventional low-speed wafers.
- the concentration of the p-type impurity (boron) in the epitaxial layer is high, so that the formation speed of the oxide film is increased.
- Oxidizing species Oxidizing Species; 0 or H 2 O
- the throughput of the insulating film formation of the wafer is further increased.
- the substrate on which the high-concentration boron epitaxial layer is formed is a silicon wafer, but the specific resistance (dopant concentration) of the silicon wafer is not limited. However, if the difference in dopant concentration between the epitaxial layer and the substrate becomes large, misfit dislocations may occur due to mismatching of the lattice constant, so that a similar value between the epitaxial layer and the substrate U, prefer specific resistance.
- the active layer wafer is a silicon wafer.
- an oxide film can be employed as the insulating film.
- the thickness of the insulating film is not limited as long as it is thinner than the epitaxial layer. For example, less than 0, preferably 0.1-0.
- the thickness of the active layer is not limited.
- the thickness is 110 m for a thick active layer. In the case of a thin active layer, it is 0.01-1 m.
- An epitaxial growth apparatus for growing an epitaxial layer on an active layer wafer is not limited.
- a vapor phase epitaxial growth apparatus can be employed.
- the vapor phase epitaxial growth apparatus may be, for example, a single-wafer type epitaxial growth apparatus for performing one epitaxial growth processing on one wafer for the active layer. Further, a batch type epitaxial growth apparatus for processing a plurality of active layer wafers at once may be used.
- the source gas for example, SiH, SiH CI, SiHCl, SiCl, etc. can be adopted.
- the carrier gas for example, hydrogen gas, inert gas, or the like can be used.
- a heating means for heating the inside of the furnace of the vapor phase epitaxial growth apparatus for example, a halogen lamp, an infrared lamp, or the like can be employed.
- the P-type impurity contained in the wafer and the epitaxial layer for the active layer for example, boron can be employed.
- the impurity concentration of the active layer wafer is not limited.
- the light element for example, in addition to hydrogen (H), rare gas elements such as helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn ), Etc.! / ,. These simple substances or compounds may be used.
- the dose of the light element at the time of ion implantation is not limited. For example, there is 2 X 10 16 — 8 X 10 16 ato ms / cm ⁇ .
- the acceleration voltage at the time of light element ion implantation is 50 keV or less, preferably 30 keV or less, and more preferably 20 keV or less. In ion implantation, the lower the accelerating voltage, the more the ion can be concentrated at the target depth.
- the heating temperature of the bonded wafer at the time of peeling is 400 ° C. or higher, preferably 400 to 700 ° C., and more preferably 450 to 550 ° C. If the temperature is lower than 400 ° C, it is difficult for the light element force ion-implanted into the active layer wafer to form light element bubbles. On the other hand, when the temperature exceeds 700 ° C., oxygen precipitates are formed in the active layer, which may cause a decrease in device characteristics.
- the atmosphere in the furnace at the time of peeling may be an atmosphere of a non-oxidizing gas (an inert gas such as nitrogen or argon). Further, it may be in a vacuum.
- a non-oxidizing gas an inert gas such as nitrogen or argon.
- the heating time of the bonded wafer at the time of peeling is 1 minute or more, preferably 10 to 60 minutes. If the time is less than 1 minute, it becomes difficult to bubble the light element ion-implanted into the bonded substrate.
- a bonding heat treatment for increasing the strength of the bonding heat treatment for the active layer wafer and the supporting wafer may be performed.
- the heat treatment conditions at this time are, for example, 1100 ° C. and 2 hours. Oxygen or the like can be used as the atmospheric gas in the thermal oxidation furnace.
- a second invention is the method for manufacturing a bonded wafer according to the first invention, wherein the concentration of boron contained in the epitaxy layer is 5 ⁇ 10 18 atoms / cm 3 or more.
- the boron concentration of the epitaxial layer is less than 5 ⁇ 10 18 atoms / cm 3 , the effect of improving the growth rate of the oxide film and the effect of recovering the ion-implanted damaged region are reduced.
- the preferred boron concentration of the epitaxial layer is 8 ⁇ 10 18 —2 ⁇ 10 19 atoms Zcm 3 .
- a third invention is directed to the first invention or the second invention, wherein the thickness of the epitaxy layer is Is a method for producing a bonded wafer having a thickness of 0.3 m or more.
- the COP existing in the active layer wafer cannot be filled with the epitaxial layer, and Depressions remain on the surface. Further, if the thickness of the epitaxial layer is less than 0.1, it is not possible to form an insulating film (an oxide film) having a predetermined thickness (about 0.2 m) on the active layer wafer including the epitaxial layer. .
- the preferred thickness of the epitaxial layer is 0.5-1 for thin-film SOI, and 1-2 m for thick SOI. After forming the SOI structure, it is preferable to further form an epitaxial film.
- a fourth invention is the method for producing a bonded wafer according to any one of the first to third inventions, wherein the ion-implanted region is formed in the epitaxy layer.
- a fifth invention is the method for manufacturing a bonded wafer according to any one of the first to fourth inventions, wherein the thickness of the insulating film is less than 0.2 ⁇ m.
- the thickness of the insulating film is less than 0.2 ⁇ m.
- the thickness is 0.2 ⁇ m or more, the ion-implanted region cannot be formed in the epitaxial layer.
- an active device having an insulating film formed thereon, containing at least 9 ⁇ 10 18 atoms / cm 3 of boron and having an oxygen concentration of less than 12 ⁇ 10 17 atoms / cm 3 (old ASTM).
- the crystal when pulling up an ingot for an active layer (eg, a silicon single crystal ingot), the crystal contains boron in an amount exceeding 9 ⁇ 10 18 atoms / cm 3. ing. Therefore, no crystal defect exists in the ingot being pulled. This is due to the fact that the silicon lattice is doped with boron, which has a small atomic size, as the boron concentration increases. Compressed and the interstitial silicon increases to relieve the compression. As a result, the thermal equilibrium concentration of the interstitial silicon increases and becomes higher than the vacancy concentration, so that there is no region in which vacancies causing COP are excessively present.
- an active layer eg, a silicon single crystal ingot
- a bonding wafer having an active layer with no crystal defects is used.
- a low-speed pulling is used.
- a high-speed pulling with higher throughput and a larger yield than the conventional wafer is used.
- the third invention only needs to increase the boron concentration in the ingot. Therefore, a bonded wafer having no crystal defects in the active layer can be manufactured at low cost.
- oxide film insulating film
- boron is contained in the active layer wafer at a high concentration (9 ⁇ 10 18 atoms / cm 3 ). I have. ⁇ ⁇ ⁇ The higher the concentration of impurities in the wafer, the faster the oxide film formation rate. Therefore, the throughput of forming the insulating film on the active layer wafer is further increased.
- the oxide film has a high concentration of impurities in the wafer.
- the boron in the eaves is localized (segregated). As a result, in silicon near the interface with the silicon oxide film, the boron concentration in the region that will eventually become the active layer of the SOI structure becomes lower than the boron concentration of the original substrate.
- the P-type impurity is contained in the active layer wafer at a high concentration, generation of charged vacancies and generation of kink sites of the active layer wafer are promoted. This accelerates the recovery (recrystallization) of crystal defects due to hydrogen ion implantation. Therefore, damage to the active layer due to ion implantation is reduced, and the quality of the active layer can be improved.
- the preferred boron concentration of the active layer wafer is 12 ⁇ 10 18 atoms / cm 3 or more (specific resistance p ⁇ 6 m ⁇ cm). If the boron concentration of the active layer wafer is less than 9 ⁇ 10 18 atoms / cm 3 (P> 10 m Q cm), COP does not disappear depending on the crystal pulling conditions.
- the resistivity p is not more than 10 m Omega cm
- the interstitial oxygen atoms concentration Oi is less than 12 X 10 17 a t O msZcm 3 [old ASTM terms, oxide film (insulating film) Formation
- a seventh invention is the method according to any one of the first to sixth inventions, wherein after the insulating film is formed on the wafer for the active layer or after the wafer is peeled off, the reduction containing hydrogen gas is performed.
- This is a method of manufacturing a bonded wafer in which the above-mentioned active layer wafer or bonded wafer is subjected to an annealing treatment at 1000 ° C. or more for 1 hour or more in a gas atmosphere.
- annealing is performed on the active layer wafer or the bonded wafer under predetermined conditions after forming or peeling off the insulating film. This promotes outward diffusion of p-type impurities in the vicinity of the surface of the active layer wafer or in the active layer, reduces the specific resistance of the active layer, and obtains 11 Om An active layer of about ⁇ cm is obtained.
- the annealing treatment may be performed after the formation of the insulating film on the active layer wafer. Alternatively, it may be after the wafer for the active layer is peeled off.
- the anneal temperature is less than 1000 ° C and the anneal time is less than 1 hour, the boron concentration in the active layer where the outdiffusion of boron is insufficient is higher than required.
- Laminating ⁇ Aha is preferred, anneal temperature is 1100-1200 ° C, and shellfish divination ⁇ Aha is preferred ⁇ aniel time is 114 hours.
- the active layer is an epitaxy layer produced by epitaxy growth without crystal defects
- the active layer is produced by the smart cut method and has an active layer having no crystal defects.
- the combined wafer can be manufactured with a higher throughput and a higher yield than when a conventional low-speed pulling wafer is used as an active layer wafer.
- the concentration of impurities in the epitaxial layer is high, the formation speed of the oxide film, which is a kind of insulating film, is increased.
- the throughput of the bonded wafer can be further increased.
- the damage of the active layer due to the ion implantation can be reduced, and the quality of the active layer can be improved.
- an annealing process is performed on the wafer for the active layer or the bonded wafer under predetermined conditions, so that the p-type impurity in the vicinity of the surface layer of the wafer for the active layer or in the active layer is obtained. Out diffusion is promoted. As a result, the specific resistance of the active layer can be reduced.
- FIG. 1 is a flow sheet showing a method for manufacturing a bonded wafer according to Example 1 of the present invention.
- FIG. 2 is a flow sheet showing a method for manufacturing a bonded wafer according to Embodiment 2 of the present invention.
- a p-type silicon single crystal ingot doped with boron at a high concentration of about 1 ⁇ 10 19 atoms Zcm 3 is pulled up by the CZ method.
- the lifting speed is 1. OmmZmin.
- the silicon single crystal ingot is subjected to block cutting, slicing, chamfering, mirror polishing, and the like.
- a p-type mirror-finished active layer wafer 10 having a thickness of 725 m, a diameter of 200 mm, a specific resistance of 9 m Q cm and a p-type is obtained.
- a p-type silicon single crystal ingot doped with boron at a low concentration of about 1 ⁇ 10 15 atoms Zcm 3 is pulled up by the CZ method. Thereafter, the silicon single crystal ingot is sequentially subjected to block cutting, slicing, chamfering, mirror polishing, and the like.
- a p-type mirror-finished supporting wafer 20 having a thickness of 725 m, a diameter of 200 mm, a specific resistance of 10 Qcm, and the like can be obtained.
- the active layer wafer 10 is inserted into a thermal oxidation apparatus, and a thermal oxidation treatment is performed in an oxygen gas atmosphere.
- a silicon oxide film 12a having a thickness of about 0.15 m is formed on the entire exposed surface of the active layer wafer 10.
- the heat treatment condition is 1000. C, 180 minutes.
- hydrogen was ion-implanted at a predetermined depth position from the mirror-finished surface of the active layer wafer 10 using a medium current ion implanter at an acceleration voltage of 50 keV. inject.
- a hydrogen ion implanted region 14 is formed in the active layer wafer 10.
- the dose at this time is 5 ⁇ 10 16 atoms / cm 2 .
- step S104 of FIG. 1 the surface of the active layer wafer 10 and the mirror surface of the supporting wafer 20 are used as a bonding surface (overlapping surface), and the silicon oxide film is formed.
- the two wafers 10 and 20 are pasted together via the film 12a by, for example, a known jig in a vacuum apparatus to produce the wafer 30.
- the active layer wafer 10 and the supporting wafer 20 are bonded via the silicon oxide film 12a, and the silicon oxide film 12a at the bonding portion is buried.
- the silicon oxide film (insulating film) 12b It becomes.
- a method of bonding surfaces that have been subjected to plasma treatment to activate the surface by plasma irradiation
- the shellfish fortune-telling @ aha 30 is peeled off, not shown. It is inserted into a heat treatment apparatus and heat-treated in a furnace temperature of 500 ° C and an atmosphere of nitrogen gas. The heat treatment time is 30 minutes. As a result, a low-temperature heat treatment for removing the active layer wafer 10 from the hydrogen ion implanted region 14 while leaving the active layer 13 on the bonding interface side of the supporting wafer 20 is performed. The remaining portion of the peeled active layer wafer 10 can be reused as a supporting wafer 20 for IJ.
- step S106 in FIG. 1 the shellfish divination Aha 30 is subjected to a bonding heat treatment at 1100 ° C. for 2 hours. Thereby, the bonding strength between the active layer wafer 10 and the supporting wafer 20 is enhanced.
- step S107 of FIG. 1 the surface of the active layer 13 is polished by a polishing apparatus.
- a bonded SOI substrate bonded @ Eno
- the crystal contains a large amount of boron as 1 ⁇ 10 19 atoms / cm 3 , the silicon There is no crystal defect in the crystal ingot, and in the active layer 13.
- Example 1 since boron was added at a high concentration in the silicon single crystal ingot, a silicon single crystal ingot having no crystal defects can be pulled at a high pulling rate of 1. OmmZmin. As a result, a bonded SOI substrate having an active layer 13 having no crystal defects can be manufactured with higher throughput and higher yield than when a low-speed pulling-up wafer is used for a conventional active layer wafer. In Example 1, since it is only necessary to increase the boron concentration in the silicon single crystal ingot, such a bonded SOI substrate can be manufactured at low cost.
- the formation rate of the silicon oxide film 12a is increased because boron is added to the active layer wafer 10 at a high concentration. Therefore, the throughput of the bonded SOI substrate can be further increased.
- boron in the active layer wafer 10 is localized (segregated) in the silicon oxide film 12a due to a difference in boron solid solubility.
- the boron concentration of the active layer 13 is reduced to about 1Z2.
- the surface of the SOI layer after peeling was flattened and thinned by polishing, but this was further increased by applying a sacrificial oxidation method. It is also possible to reduce the degree.
- the active layer wafer 10 has a specific resistance p of less than 10 m ⁇ cm, an interstitial oxygen atom concentration Oi of less than 12 ⁇ 10 17 atoms / cm 3 , and a formation temperature of the silicon oxide film 12 a exceeding 1000 ° C. Satisfies manufacturing conditions. Therefore, even after the separation, crystal defects such as oxygen precipitates and OSF do not occur in the remaining portion of the active layer wafer 10. As a result, the active layer wafer 10 can be reused.
- the temperature is not less than 1000 ° C. with respect to the active layer wafer 10 or the bonded wafer 30 in a hydrogen gas or other reducing gas atmosphere.
- An annealing treatment for more than an hour may be performed. This promotes outward diffusion of boron near the surface of active layer wafer 10 or in active layer 13. As a result, the specific resistance of the active layer 13 can be reduced.
- a feature of the second embodiment is that, instead of the active layer wafer 10 having a boron concentration of 1 ⁇ 10 19 at O m S / cm 3 , a single crystal silicon epitaxy layer 40 containing a high concentration of boron grows on the surface.
- a wafer 10B for an active layer containing boron at a low concentration is employed for the entire balta.
- Example 2 a method for manufacturing the bonded wafer of Example 2 will be specifically described.
- a p-type silicon single crystal ingot doped with boron at a low concentration of about l ⁇ 10 15 atoms / cm 3 is pulled up by the CZ method.
- the lifting speed is 1. OmmZmin.
- the silicon single crystal ingot is sequentially subjected to block cutting, slicing, chamfering, mirror polishing, and the like.
- a mirror-finished active layer wafer 10 and a supporting wafer 20 having a thickness of 725 m, a diameter of 200 mm, and a specific resistance of 10 ⁇ « ⁇ , ⁇ type are obtained. , Respectively.
- the active layer wafer 10 is inserted into an epitaxial growth apparatus (not shown), and boron is added in a large amount of 1 ⁇ 10 19 atoms / cm 3 to the mirror-finished surface of the active layer wafer 10.
- the grown P + type epitaxial layer 40 is grown.
- step S202 of FIG. 2 the active layer wafer 10 is placed on a susceptor provided in a reactor of an epitaxy growth apparatus. Then, use SiHCl gas (0.1
- n is supplied to the reaction furnace, and the epitaxial layer 40 is grown on the surface of the active layer wafer 10.
- the epitaxy growth temperature is 1100 ° C and the epitaxy growth time is 2 minutes.
- an epitaxial layer 40 having a thickness of about 0.6 / ⁇ and a specific resistance of about 9 mQcm is grown on the surface of the active layer wafer 10.
- the active layer wafer 10 is inserted into a thermal oxidation apparatus, and a thermal oxidation treatment is performed in an oxygen gas atmosphere.
- a silicon oxide film 12a having a thickness of 0.15 / zm is formed on the entire exposed surface of the active layer wafer 10 including the surface of the epitaxial layer 40.
- the heat treatment conditions are 1000 ° C and 180 minutes.
- step S204 of FIG. 2 hydrogen is ion-implanted at a predetermined depth position from the surface of the epitaxial layer 40 by using a medium-current ion implantation apparatus at an acceleration voltage of 50 keV.
- the hydrogen ion implanted region 14 is formed in the epitaxial layer 40.
- the dose at this time is 5 ⁇ 10 16 atoms / cm 2 .
- step S205 in FIG. 2 the surface of the active layer wafer 10 and the mirror surface of the supporting wafer 20 are used as a bonding surface (overlapping surface), and the silicon oxide film is formed.
- the two wafers 10 and 20 are bonded to each other by a known jig in a vacuum device through the 12a, for example, and the wafer 30 is manufactured.
- the active layer wafer 10 and the supporting wafer 20 are bonded via the silicon oxide film 12a, and the silicon oxide film 12a at the bonding portion is buried.
- the silicon oxide film (insulating film) 12b It becomes.
- step S206 of FIG. 2 the bonded wafer 30 is inserted into a peeling heat treatment apparatus (not shown) and subjected to peeling heat treatment at a furnace temperature of 500 ° C. and a nitrogen gas atmosphere for 30 minutes.
- the active layer 13 is formed on the bonding interface side of the supporting wafer 20.
- a low-temperature heat treatment for removing the active layer wafer 10 from the hydrogen ion implanted region 14 is performed.
- step S207 of Fig. 2 the shellfish divination Aha 30 is subjected to a bonding heat treatment at 1100 ° C for 2 hours. Thereby, the bonding strength between the active layer wafer 10 and the supporting wafer 20 is enhanced.
- step S208 of FIG. 2 the surface of the active layer 13 is polished by a polishing apparatus.
- a bonded SOI substrate bonded @ Eno
- the active layer 13 is left on the supporting wafer 20 side via the embedded silicon oxide film 12b, and the remaining part of the active layer wafer 10 is peeled. Therefore, there is no crystal defect in the bonded SOI substrate employing the smart printing method.
- the bonded SOI substrate having the active layer 13 can be pulled up at a low speed in the past. The force can be produced using a high-speed pulling wafer having a large yield. Further, in the manufacture thereof, it is only necessary to increase the boron concentration in the silicon single crystal ingot. Therefore, a bonded SOI substrate having no crystal defects in the active layer 13 can be manufactured at low cost.
- the BMD Bulk Micro Defect
- the OSF Oxidation Induced Sacking Fault
- a light etch evaluation method in which the wafer for the active layer is heat-treated at 1000 ° C. for 16 hours, and then the wafer for the active layer is etched.
- Test example 1 1 1 X 1 0 1 Vcm 3 1 000 ° c ⁇
- Test example 2 1 2 X 10 'Vc m 3 1 000 ° c ⁇
- Test Example 1 exemplary experiment 2 is a result of the are all evaluated in BMDZOSF in 5X 10 less than 3 ZCM 2, Comparative Example 1 one It was improved compared to Comparative Example 3.
- Comparative Example 1 since the formation temperature of the buried silicon oxide film was lower than 1000 ° C., crystal defects slightly exceeding 5 ⁇ 10 3 Zcm 2 were present in the remaining active layer wafer after peeling. It was not suitable for reusing the wafer 10 for the active layer.
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JP2005513711A JP4419147B2 (ja) | 2003-09-08 | 2004-09-08 | 貼り合わせウェーハの製造方法 |
US10/570,663 US7446016B2 (en) | 2003-09-08 | 2004-09-08 | Method for producing bonded wafer |
EP20040787752 EP1667208A4 (en) | 2003-09-08 | 2004-09-08 | PROCESS FOR PRODUCTION OF PLATELET LI |
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JP2007201430A (ja) * | 2006-01-23 | 2007-08-09 | Soi Tec Silicon On Insulator Technologies Sa | 電気特性を向上させた複合基板の作製方法 |
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WO2009125844A1 (ja) * | 2008-04-10 | 2009-10-15 | 信越化学工業株式会社 | 貼り合わせ基板の製造方法 |
US8314006B2 (en) | 2008-04-10 | 2012-11-20 | Shin-Etsu Chemical Co., Ltd. | Method for manufacturing bonded wafer |
US9240543B2 (en) | 2008-10-31 | 2016-01-19 | Murata Manufacturing Co., Ltd. | Method for manufacturing piezoelectric device |
JP2010135451A (ja) * | 2008-12-03 | 2010-06-17 | Sumco Corp | 貼り合わせ基板のボイド検査方法 |
WO2011151968A1 (ja) | 2010-06-01 | 2011-12-08 | 信越半導体株式会社 | 貼り合わせウェーハの製造方法 |
JP2012059726A (ja) * | 2010-09-03 | 2012-03-22 | Shin Etsu Handotai Co Ltd | 貼り合わせsoiウェーハの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2005024917A1 (ja) | 2007-11-08 |
EP1667208A9 (en) | 2006-10-18 |
EP1667208A4 (en) | 2010-05-19 |
US20060281280A1 (en) | 2006-12-14 |
EP1667208A1 (en) | 2006-06-07 |
JP4419147B2 (ja) | 2010-02-24 |
US7446016B2 (en) | 2008-11-04 |
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