WO2013179804A1 - 半導体装置の製造方法およびアニール方法 - Google Patents
半導体装置の製造方法およびアニール方法 Download PDFInfo
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- WO2013179804A1 WO2013179804A1 PCT/JP2013/061619 JP2013061619W WO2013179804A1 WO 2013179804 A1 WO2013179804 A1 WO 2013179804A1 JP 2013061619 W JP2013061619 W JP 2013061619W WO 2013179804 A1 WO2013179804 A1 WO 2013179804A1
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- 238000000137 annealing Methods 0.000 title claims abstract description 156
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- H—ELECTRICITY
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- 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
- H01L21/324—Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering
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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
- H01L21/02—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
- H01L21/22—Diffusion of impurity materials, e.g. doping materials, electrode materials, into or out of a semiconductor body, or between semiconductor regions; Interactions between two or more impurities; Redistribution of impurities
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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
- H01L21/02—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
- H01L21/265—Bombardment with radiation with high-energy radiation producing ion implantation
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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
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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
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67248—Temperature monitoring
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- 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
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- H—ELECTRICITY
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- 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
- H01L21/265—Bombardment with radiation with high-energy radiation producing ion implantation
- H01L21/26506—Bombardment with radiation with high-energy radiation producing ion implantation in group IV semiconductors
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- H—ELECTRICITY
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- 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
- H01L21/265—Bombardment with radiation with high-energy radiation producing ion implantation
- H01L21/26506—Bombardment with radiation with high-energy radiation producing ion implantation in group IV semiconductors
- H01L21/26513—Bombardment with radiation with high-energy radiation producing ion implantation in group IV semiconductors of electrically active species
Definitions
- the present invention relates to a method for manufacturing a semiconductor device and an annealing method for forming an impurity diffusion layer by performing activation annealing after doping impurities into a semiconductor substrate.
- the low-temperature annealing technique has a problem that defects generated during impurity doping cannot be sufficiently repaired.
- defects generated during impurity doping cannot be sufficiently repaired.
- SPE is performed after impurity doping is performed on an amorphized region
- many crystal defects remain at the terminal portion of the first amorphized region. If defects remain in this way, it causes a leak current during device operation.
- an object of the present invention is to provide a semiconductor device manufacturing method and an annealing method capable of sufficiently repairing crystal defects even when impurity activation annealing after doping a semiconductor substrate with impurities is performed at a low temperature. is there.
- the impurity diffusion layer forming region in the semiconductor substrate is doped with impurities, and the semiconductor substrate is subjected to lamp annealing using a heating lamp and microwave annealing for irradiating the microwave.
- a method of manufacturing a semiconductor device includes performing an annealing process including activating impurities.
- the annealing treatment is preferably performed at a temperature in the range of 300 to 600 ° C.
- the annealing treatment for activating the impurities is preferably performed by microwave annealing after performing lamp annealing.
- the impurity diffusion layer forming region is further made amorphous, and the impurity diffusion layer forming region made amorphous during annealing for activating the impurity May be recrystallized.
- an annealing method for performing an annealing process for activating an impurity after doping the impurity diffusion layer forming region in the semiconductor substrate, the lamp annealing using a heating lamp, An annealing method is provided that performs both microwave annealing to irradiate waves.
- FIG. 3 is a flowchart illustrating a method for manufacturing a semiconductor device according to an embodiment of the present invention. It is a schematic sectional drawing which shows the example of the microwave annealing apparatus used for microwave annealing. It is a schematic sectional drawing which shows the example of the lamp annealing apparatus used for lamp annealing. It is a figure which shows the relationship between the heating temperature and sheet resistance of the sample which performed various annealing after performing pre-amorphization and ion implantation. Sample after pre-amorphization and ion implantation, before annealing, sample subjected to spike annealing at 1000 ° C., sample subjected to lamp annealing at 600 ° C. and microwave annealing alone, at 600 ° C.
- FIG. 1 is a flowchart showing a method for manufacturing a semiconductor device according to an embodiment of the present invention.
- the impurity diffusion layer forming region of the semiconductor wafer is amorphized (step 1).
- Typical examples of the impurity diffusion layer include a source electrode and a drain electrode of a MOS type semiconductor device.
- the impurity diffusion layer formation region By making the impurity diffusion layer formation region amorphous in this way, the controllability of the implantation depth can be improved, and since there is no crystal grain boundary, it is possible to facilitate impurity doping in the next step, Impurity activation and recrystallization (SPE) are possible even if the subsequent annealing treatment is performed at a low temperature.
- SPE Impurity activation and recrystallization
- Ge is ion-implanted.
- the ranges of implantation energy: 10 to 100 keV and implantation dose amount: 1 ⁇ 10 14 to 5 ⁇ 10 15 ions / cm 2 are employed.
- Ar, Kr, or the like can be used instead of Ge.
- impurities are doped into the amorphized impurity diffusion layer forming region (step 2).
- Impurity doping can be performed by ordinary ion implantation.
- the impurity may be an n-type impurity or a p-type impurity. Examples of the n-type impurity include P and As, and examples of the p-type impurity include B.
- the conditions for doping impurities by ion implantation are, for example, in the range of an implantation energy of 1 to 100 keV and an implantation dose of 1 ⁇ 10 15 to 5 ⁇ 10 15 ions / cm 2 when B is taken as an example.
- annealing treatment including lamp annealing and microwave annealing is performed on the semiconductor wafer (semiconductor substrate) after the introduction of impurities (step 3).
- This annealing treatment activates impurities, recrystallizes, and repairs crystal defects.
- the microwave annealing is performed by irradiating the semiconductor wafer with microwaves and heating the semiconductor wafer.
- the lamp annealing is performed by heating the semiconductor wafer using, for example, a halogen lamp or a xenon lamp as a heating lamp.
- the microwave annealing apparatus 100 includes a processing container (applicator) 1 that accommodates a semiconductor wafer (semiconductor substrate) W that is a substrate to be processed.
- a processing container (applicator) 1 that accommodates a semiconductor wafer (semiconductor substrate) W that is a substrate to be processed.
- a plurality of, for example, three (only two are shown) mounting pins 2 on which the semiconductor wafer W is mounted are disposed above the lifting plate 3 provided at the bottom of the processing container 1.
- a lift bar 4 is attached to the bottom peripheral edge of the lift plate 3 so as to protrude through the bottom of the processing container 1 and extend downward.
- the lifting / lowering bar 4 is attached so as to penetrate into the lifting / lowering mechanism 5, and when the lifting / lowering mechanism 5 moves up and down along the guide member 7, the lifting / lowering bar 4, the lifting / lowering plate 3 and the mounting pin 2 are lifted and lowered. At the same time, the semiconductor wafer W placed on the placement pins 2 is also moved up and down.
- a support plate 8 is attached to a lower end portion of the guide member 7 at a position corresponding to the lifting mechanism 5.
- An insertion hole 4 a through which the lifting rod 4 is inserted is formed at the bottom of the processing container 1, and a bellows 6 a is provided between the peripheral portion of the insertion hole 4 a at the bottom of the processing container 1 and the upper surface of the lifting mechanism 5.
- a bellows 6 b is provided between the peripheral portion of the lifting rod 4 on the lower surface of the lifting mechanism 5 and the support plate 8.
- a gas introduction port 11 is formed in the upper portion of the side wall of the processing container 1, and a gas forming an atmosphere during processing is introduced from the gas supply unit 12 into the processing container 1 through the pipe 13 through the pipe 13. It has come to be.
- the pipe 13 is provided with a flow control valve 15.
- an inert gas such as Ar gas or N 2 gas can be used.
- a cooling member 20 having a disk shape corresponding to the semiconductor wafer W is disposed below the support position of the semiconductor wafer W.
- a gas flow path 21 is formed inside the cooling member 20, and cooling gas is supplied to the gas flow path 21 via a cooling gas pipe 22.
- a gas discharge hole 23 extending from the gas flow path 21 is opened on the upper surface of the cooling member 20, and the cooling gas flowing through the gas flow path 21 is discharged to the back surface of the semiconductor wafer W through the gas discharge hole 23.
- the cooling gas pipe 22 is branched from the pipe 13 extending from the gas supply unit 12 and inserted into the processing container 1, and a gas for forming an atmosphere during processing is supplied as a cooling gas.
- the cooling gas pipe 22 is provided with a flow rate control valve 25.
- a baffle plate 27 is provided between the cooling member 20 and the inner surface of the processing container 1.
- An exhaust port 31 is provided at the bottom of the processing vessel 1, and an exhaust pipe 32 is connected to the exhaust port 31.
- the exhaust pipe 32 is provided with a dry pump (DP) 33 for exhausting the inside of the processing container 1.
- DP dry pump
- An open / close valve 34 and the processing container 1 are provided between the processing container 1 and the dry pump 33 in the exhaust pipe 32.
- An automatic pressure control valve (APC) 35 for controlling the internal pressure is interposed.
- the inside of the processing container 1 is maintained at a predetermined pressure suitable for the microwave annealing process.
- the pressure in the processing container 1 is maintained at a pressure at which plasma is not generated when microwaves are irradiated therein, for example, a predetermined pressure in the vicinity of atmospheric pressure.
- a loading / unloading port for loading / unloading the semiconductor wafer is provided on the side wall of the processing chamber 1 by a gate valve.
- the mounting pin 2 is formed with a suction hole 2a for vacuum suction.
- a space 3a is formed in the elevating plate 3
- a hole 4b is formed in the elevating rod 4
- a hole 8a is formed in the support plate 8
- a pipe 36 is connected to the hole 8a.
- the pipe 36 is connected to the exhaust pipe 32, and the dry pump 33 is operated to suck the semiconductor wafer W through the pipe 36, the hole 8a, the inside of the bellows 6b, the hole 4b, the space 3a, and the suction hole 2a.
- a valve 37 is interposed in the pipe 36.
- a radiation thermometer (pyro sensor) 41 for measuring the temperature of the semiconductor wafer W is provided on the back side of the semiconductor wafer W.
- a radiation thermometer 41 for measuring the temperature of the semiconductor wafer W.
- three radiation thermometers 41 are provided in the figure, the number thereof is set as appropriate.
- the microwave supply unit 50 includes a waveguide 52 connected to the microwave introduction port 1a, and a microwave having a frequency of, for example, 5.8 GHz, provided at the end of the waveguide 52 opposite to the microwave introduction port 1a. And a magnetron 53 for generating waves. The introduction of the microwave from the magnetron 53 to the waveguide 52 is performed via the launcher 53a.
- the waveguide 52 is provided with an isolator 54 for separating the reflected microwave and a tuner 55 for matching impedance. Power is supplied to the magnetron 53 from the power supply unit 60.
- a dielectric member 56 is provided between the waveguide 52 and the microwave introduction port 1a.
- a rotary stirring plate (stirrer) 57 for stirring the atmosphere is provided at a position above the semiconductor wafer W in the processing container 1 to prevent the formation of standing waves.
- a mechanism for rotating the semiconductor wafer W may be provided to prevent the formation of standing waves.
- microwave annealing apparatus 100 it is possible to efficiently heat the semiconductor wafer W by irradiating the semiconductor wafer W with the microwave from the microwave supply unit 50.
- the lamp annealing apparatus 200 includes a processing container 101 that houses a semiconductor wafer (semiconductor substrate) W that is a substrate to be processed.
- the processing container 101 is provided with a mounting table 102 on which the semiconductor wafer W is mounted, and is mounted on a mounting pin 102 a provided on the surface of the mounting table 102 of the semiconductor wafer W. It has become.
- the mounting table 102 is supported by a support member 103, and the support member 103 passes through a hole 101 a formed in the bottom of the processing container 101 and is supported by an elevating plate 104 provided therebelow.
- the lifting plate 104 can be moved up and down by a lifting mechanism 105.
- a bellows 106 is provided between the processing container 101 and the lifting plate 104.
- a gas introduction port 111 is formed on the side wall of the processing container 101, and a gas forming an atmosphere during the processing is introduced from the gas supply port 112 through the pipe 113 into the processing container 101 from the gas introduction port. It is like that.
- a gas for forming such an atmosphere an inert gas such as Ar gas or N 2 gas can be used.
- An exhaust port 121 is provided at the bottom of the processing vessel 101, and an exhaust pipe 122 is connected to the exhaust port 121.
- the exhaust pipe 122 is provided with an exhaust device 123 including a dry pump and valves for exhausting the inside of the processing vessel 101. In this way, by exhausting by the exhaust device 123 while supplying a predetermined gas into the processing container 101, the inside of the processing container 101 is maintained in an atmosphere suitable for lamp heating.
- a temperature measuring mechanism 130 is provided on the side wall of the processing vessel 101.
- the temperature measurement mechanism 130 includes a reference light irradiation unit 131 and a radiation temperature measurement unit 132.
- the reference light irradiation unit 131 irradiates a reference light source 133 that emits reference light for measuring a radiation temperature, and an introduction provided on the side wall of the processing container 101 to introduce the reference light from the reference light source 133 into the processing container 101.
- a port 134 and a quartz glass window 135 provided in the introduction port 134 are provided.
- the radiation temperature measurement unit 132 includes a two-polarization radiation thermometer 136 for measuring the radiation temperature of the semiconductor wafer W, an injection port 137 provided at a position facing the introduction port 134 on the side wall of the processing vessel 101, and an injection And a quartz glass window 138 provided at the port 137.
- the two-polarized radiation thermometer 136 receives the reference light reflected from the reference light source 133 through the introduction port 134 and the semiconductor wafer W, and the thermal radiation light emitted from the semiconductor wafer W, and based on these, the semiconductor wafer W Measure the temperature.
- a loading / unloading port for loading / unloading semiconductor wafers is provided on the side wall of the processing chamber 101 by a gate valve.
- a lamp unit 140 is provided above the processing vessel 101 so as to face the semiconductor wafer W on the mounting table 102.
- the lamp unit 140 includes a lamp house 141 and a plurality of heating lamps 142 arranged therein.
- As the heating lamp 142 a halogen lamp or a xenon lamp can be used.
- the lamp unit 140 and the processing container 101 are partitioned by two transparent plates 151 and 152 and a water filter film 153 provided therebetween.
- the water filter film 153 absorbs and removes part of infrared light from the light component from the heating lamp 142 so that the light wavelength of the heating lamp 142 and the light wavelength used in the temperature measurement mechanism 130 do not interfere with each other. ing.
- the semiconductor lamp W can be heated to a required temperature in an extremely short time of 0.01 sec or less by the heating lamp 142.
- annealing was performed only by lamp heating at 1000 ° C. or higher. However, this spreads the diffusion layer and cannot meet the demand for miniaturization of semiconductor elements. For this reason, a lower temperature annealing process is required.
- the temperature of lamp annealing and microwave annealing is preferably 300 to 600 ° C. If the temperature is lower than 300 ° C., impurity activation and crystal defect repair are not sufficient, while if it exceeds 600 ° C., the controllability of the impurity diffusion region decreases. These times are preferably 1 to 100 min. Further, the microwave frequency in the microwave annealing can be in the range of 1 to 100 GHz, and among these, 2.54 GHz and 5.8 GHz are preferable. Further, the output of the microwave depends on the volume of the object to be heated, and in order to heat to 300 to 600 ° C. as described above, the power density of 10 to 36 W / cm 3 is used with the microwave of 5.8 GHz. It is necessary, and a power of 600 to 2000 W is necessary for a 300 mm wafer.
- the impurity activation was evaluated by measuring the resistance value of the diffusion layer by four-probe sheet resistance measurement.
- impurities are doped in the source and drain of a MOS transistor, and Ge ion implantation (implantation energy: 30 keV, implantation dose: 5 ⁇ 10 14) for preamorphization is performed on a single crystal n-type Si wafer. ions / cm 2 ), followed by B ion implantation (implantation energy: 3 keV, implantation dose: 3 ⁇ 10 15 ions / cm 2 ).
- This sample was subjected to halogen lamp annealing (RTA) only for 5 min and 10 min at 400 ° C., 500 ° C., and 600 ° C.
- sample A subjected to spike annealing at 1000 ° C. with a halogen lamp as an annealing treatment
- sample B subjected to halogen lamp annealing at 600 ° C. for 10 min
- microwave annealing 5.8 GHz
- sample D for 5 minutes (sample D), and after microwave annealing was performed at 600 ° C. for 5 minutes, the halogen lamp
- sample E annealed at 600 ° C. for 5 min
- the resistance value measurement of the diffusion layer four-probe sheet resistance measurement
- the cathodoluminescence measurement for grasping the crystal defect
- Table 1 The results of resistance measurement are shown in Table 1 below. As shown in Table 1, all the samples exhibited the same sheet resistance. Both the conventional spike annealing at a high temperature, the lamp annealing at 600 ° C., and the microwave annealing alone, both of them were used. It was confirmed that the effect on impurity activation did not change.
- FIG. 5 is a diagram showing a CL spectrum.
- CL is a light emission phenomenon caused by electron beam excitation, whereby crystal defects can be easily grasped.
- TO is an emission line due to bound excitons related to TO phonons
- X is attributed to emission due to interstitial Si complex center.
- the emission line, W is the emission line attributed to the emission due to the interstitial Si cluster
- W ′ is the emission line in which the peak of W is shifted due to the rare gas. it is conceivable that. Therefore, the emission due to the interstitial Si cluster is recognized as W + W ′.
- Samples D and E which used both lamp annealing and microwave annealing at 600 ° C., both have higher spectral intensities than Sample A, but the spectral intensities are significantly lower than Samples B and C. It has been confirmed that the effect of repairing crystal defects can be enhanced by performing both lamp annealing and microwave annealing. Further, when comparing the sample D and the sample E, the spectral intensity is lower in the sample D that is subjected to the microwave annealing after the lamp annealing, and the crystal annealing is performed by performing the microwave annealing after performing the lamp annealing. It was confirmed that the effect of repairing the defect is higher.
- the intensity of W + W ′ indicating typical crystal defects was determined from the CL spectrum.
- the result is shown in FIG.
- the sample D which was subjected to the microwave annealing after the lamp annealing at 600 ° C. has a slight peak height of W + W ′, and the sample B and 600 ° C. which were subjected to the lamp annealing at 600 ° C.
- the number of crystal defects is smaller than that of the sample C subjected to the microwave annealing in the above, and by performing the lamp annealing and the microwave annealing at 600 ° C. for 5 minutes each, the lamp annealing alone and the microwave annealing corresponding to the same thermal budget are performed. It was confirmed that the repair effect was extremely high.
- TEM transmission electron microscope
- the annealing process for activating the impurity after doping the impurity diffusion layer forming region in the semiconductor substrate is performed by the lamp annealing using the heating lamp and the microwave.
- the microwave annealing to irradiate it is possible to obtain a high crystal defect repair effect as well as the impurity activation effect even in the annealing treatment at a low temperature.
- an apparatus for performing lamp annealing and microwave annealing is not limited to the microwave annealing apparatus and lamp annealing apparatus exemplified in the above embodiment.
- the impurity diffusion layer forming region is amorphized in advance, and after impurity doping, recrystallization is performed simultaneously with impurity activation by annealing.
- amorphization is not essential.
- a silicon wafer (substrate) has been described as an example of a semiconductor wafer (substrate), the present invention is not limited to this, and a compound semiconductor wafer (substrate) such as SiC may be used.
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Abstract
Description
図1は、本発明の一実施形態に係る半導体装置の製造方法を示すフローチャートである。
マイクロ波アニール装置100は、被処理基板である半導体ウエハ(半導体基板)Wを収容する処理容器(アプリケータ)1を有している。処理容器1内には、その中で半導体ウエハWを載置する複数、例えば3本(2本のみ図示)の載置ピン2が処理容器1内の底部に設けられた昇降板3から上方に突出するように設けられ、昇降板3の底面周縁部には、昇降棒4が処理容器1の底部を貫通して下方に延びるように取り付けられている。昇降棒4は昇降機構5内に貫通するようにして取り付けられており、昇降機構5がガイド部材7に沿って昇降することにより昇降棒4、昇降板3、載置ピン2が昇降し、それにともなって載置ピン2に載置された半導体ウエハWも昇降するようになっている。ガイド部材7の下端部には、昇降機構5に対応した位置に支持板8が取り付けられている。処理容器1の底部には昇降棒4が挿通する挿通孔4aが形成されており、処理容器1底部の挿通孔4aの周囲部分と昇降機構5の上面との間にはベローズ6aが設けられている。一方、昇降機構5下面の昇降棒4の周囲部分と支持板8との間にはベローズ6bが設けられている。
ランプアニール装置200は、被処理基板である半導体ウエハ(半導体基板)Wを収容する処理容器101を有している。処理容器101には、その中で半導体ウエハWを載置する載置台102が設けられており、半導体ウエハWの載置台102の表面に設けられた載置ピン102a上に載置されるようになっている。載置台102は支持部材103に支持されており、支持部材103は処理容器101の底部に形成された穴101aを貫通してその下方に設けられた昇降板104に支持されている。昇降板104は昇降機構105により昇降可能となっている。処理容器101と昇降板104との間にはベローズ106が設けられている。
Claims (7)
- 半導体基板における不純物拡散層形成領域へ不純物をドーピングすることと、
前記半導体基板に、加熱ランプを用いたランプアニールとマイクロ波を照射するマイクロ波アニールを含むアニール処理を施して不純物を活性化することと
を有する、半導体装置の製造方法。 - 前記アニール処理は、300~600℃の範囲の温度で行う、請求項1に記載の半導体装置の製造方法。
- 前記不純物を活性化するためのアニール処理は、ランプアニールを行った後にマイクロ波アニールを行う、請求項1に記載の半導体装置の製造方法。
- 前記不純物をドーピングすることに先立って、前記不純物拡散層形成領域をアモルファス化することをさらに有し、前記不純物を活性化するためのアニール処理の際にアモルファス化した前記不純物拡散層形成領域を再結晶化する、請求項1に記載の半導体装置の製造方法。
- 半導体基板における不純物拡散層形成領域へ不純物をドーピングした後に不純物を活性化するためのアニール処理を行うアニール方法であって、
加熱ランプを用いたランプアニールと、マイクロ波を照射するマイクロ波アニールの両方を行う、アニール方法。 - 300~600℃の範囲の温度で行う、請求項5に記載のアニール方法。
- ランプアニールを行った後にマイクロ波アニールを行う、請求項5に記載のアニール方法。
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EP13796377.3A EP2858095A4 (en) | 2012-05-31 | 2013-04-19 | SEMICONDUCTOR MANUFACTURING METHOD AND ANNEALING METHOD |
US14/403,566 US20150132930A1 (en) | 2012-05-31 | 2013-04-19 | Method for manufacturing semiconductor device and annealing method |
KR20147036645A KR20150023508A (ko) | 2012-05-31 | 2013-04-19 | 반도체 장치의 제조 방법 및 어닐링 방법 |
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CN107112187A (zh) * | 2014-12-18 | 2017-08-29 | 瓦里安半导体设备公司 | 动态加热方法以及晶圆处理系统 |
US20180114690A1 (en) * | 2015-03-19 | 2018-04-26 | Sharp Kabushiki Kaisha | Cleaning method, method for manufacturing semiconductor device, and plasma treatment device |
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US9129918B2 (en) * | 2013-10-30 | 2015-09-08 | Taiwan Semiconductor Manufacturing Company Limited | Systems and methods for annealing semiconductor structures |
JP6163442B2 (ja) * | 2014-03-05 | 2017-07-12 | 株式会社東芝 | 半導体製造装置及び半導体装置の製造方法 |
JP6891655B2 (ja) * | 2017-06-14 | 2021-06-18 | 株式会社Sumco | 半導体ウェーハの製造方法および半導体ウェーハ |
CN107706127A (zh) * | 2017-07-18 | 2018-02-16 | 中国科学院微电子研究所 | 一种混合退火装置及退火方法 |
JP2019106457A (ja) * | 2017-12-12 | 2019-06-27 | トヨタ自動車株式会社 | 評価用ウエハの製造方法 |
TWI674630B (zh) * | 2018-10-18 | 2019-10-11 | 環球晶圓股份有限公司 | 高電子遷移率電晶體的製造方法 |
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US20150132930A1 (en) | 2015-05-14 |
EP2858095A4 (en) | 2016-02-17 |
EP2858095A1 (en) | 2015-04-08 |
KR20150023508A (ko) | 2015-03-05 |
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