WO2020116169A1 - アニール装置及びアニール方法 - Google Patents
アニール装置及びアニール方法 Download PDFInfo
- Publication number
- WO2020116169A1 WO2020116169A1 PCT/JP2019/045461 JP2019045461W WO2020116169A1 WO 2020116169 A1 WO2020116169 A1 WO 2020116169A1 JP 2019045461 W JP2019045461 W JP 2019045461W WO 2020116169 A1 WO2020116169 A1 WO 2020116169A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- annealing
- intensity
- melting
- sensor
- thermal radiation
- Prior art date
Links
- 238000000137 annealing Methods 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims description 36
- 238000012545 processing Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000002344 surface layer Substances 0.000 claims abstract description 10
- 230000002123 temporal effect Effects 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims description 66
- 238000002844 melting Methods 0.000 claims description 66
- 230000005855 radiation Effects 0.000 claims description 44
- 230000008859 change Effects 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 7
- 239000000155 melt Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 description 19
- 239000002019 doping agent Substances 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005224 laser annealing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000007704 transition Effects 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
- H01L21/67—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/03—Observing, e.g. monitoring, the workpiece
- B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/03—Observing, e.g. monitoring, the workpiece
- B23K26/034—Observing the temperature of the workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/083—Devices involving movement of the workpiece in at least one axial direction
- B23K26/0853—Devices involving movement of the workpiece in at least in two axial directions, e.g. in a plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/354—Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/268—Bombardment with radiation with high-energy radiation using electromagnetic radiation, e.g. laser radiation
-
- 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
- H01L21/67253—Process monitoring, e.g. flow or thickness monitoring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
- H01L22/26—Acting in response to an ongoing measurement without interruption of processing, e.g. endpoint detection, in-situ thickness measurement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/40—Semiconductor devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
- B23K2103/56—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26 semiconducting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
Definitions
- the present invention relates to an annealing device and an annealing method.
- Patent Document 1 discloses a laser annealing apparatus suitable for activation annealing of a dopant implanted in a deep region. Further, a method of activating impurities by melting the surface layer portion of a semiconductor wafer is also known.
- An object of the present invention is to provide an annealing device and an annealing method capable of estimating the melting depth during annealing.
- a heating unit that heats the surface of the object to be annealed to temporarily melt the surface layer portion
- a sensor for detecting thermal radiation light from the annealing object heated by the heating unit
- An annealing apparatus includes a processing unit that estimates an annealing result of the annealing target based on a waveform indicating a temporal change in the intensity of the thermal radiation light detected by the sensor.
- Part of the surface of the object to be annealed is heated to melt the surface layer,
- an annealing method for estimating an annealing result of the annealing target based on a waveform showing a temporal change in intensity of thermal radiation light from a heated portion of the annealing target.
- the melting time can be calculated from the waveform that shows the time variation of the intensity of thermal radiation.
- the melting depth during heating depends on the melting time. Therefore, the annealing result such as the melting depth can be estimated from the melting time.
- FIG. 1 is a schematic diagram of an annealing apparatus according to an embodiment.
- FIG. 2 is a graph showing an example of the waveform of the thermal radiation light observed in one irradiation with the pulsed laser beam.
- FIG. 3 is a graph showing the relationship between the melting time and the melting depth.
- FIG. 4 is a flowchart of the annealing method according to the embodiment.
- FIG. 5 is a diagram showing an example of a graphic displayed on the output device.
- FIG. 6A is a graph showing the waveform of the actually measured intensity of heat radiation light
- FIG. 6B shows the melting time obtained from the waveform shown in FIG. 6A and the area of the waveform of the intensity of heat radiation light. It is a graph which shows a relationship.
- FIGS. 1 to 6 An annealing apparatus and an annealing method according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.
- FIG. 1 is a schematic diagram of an annealing device according to an embodiment.
- a holding table 13 is supported in the chamber 10 by a scanning mechanism 12.
- the scanning mechanism 12 can move the holding table 13 in a horizontal plane in response to a command from the processing unit 40.
- the scanning mechanism 12 includes an encoder, and position information indicating the current position of the holding table 13 is read by the processing unit 40 from the encoder.
- the annealing object 30 is held on the holding table 13.
- the holding table 13 includes a vacuum chuck mechanism, and vacuum-holds and fixes the annealing target 30.
- the annealing object 30 is, for example, a semiconductor wafer such as a silicon wafer in which a dopant is implanted.
- the laser annealing apparatus performs, for example, dopant activation annealing.
- the laser light source 20 receives a command from the processing unit 40 and outputs a pulsed laser beam for annealing.
- the laser light source 20 for example, a solid-state laser such as an Nd:YAG laser that outputs a pulsed laser beam in the green wavelength range is used. The light of the green wavelength corresponds to the second harmonic.
- the laser beam output from the laser light source 20 passes through the transmission optical system 21, the dichroic mirror 22, and the lens 23, passes through the laser transmission window 11 provided on the top plate of the chamber 10, and is incident on the annealing target 30. To do.
- the dichroic mirror 22 transmits the pulsed laser beam for annealing.
- the transmission optical system 21 includes, for example, a beam homogenizer, a lens, a mirror and the like. The beam homogenizer and the lens 23 shape the beam spot on the surface of the object to be annealed 30 and make the beam profile uniform.
- the annealing target 30 When the pulse laser beam is incident on the annealing target 30, the annealing target 30 is locally heated.
- the thermal radiation light radiated from the heated portion of the annealing object 30 passes through the laser transmission window 11, passes through the lens 23, is reflected by the dichroic mirror 22, and further enters the sensor 25 via the lens 24.
- the dichroic mirror 22 reflects heat radiation light having a wavelength range of about 900 nm or more.
- the sensor 25 measures the intensity of heat radiation light in a specific wavelength range.
- the spectrum of thermal radiation from a black body and the temperature of the black body are theoretically related.
- the spectrum of thermal radiation from an actual object can be obtained based on the emissivity and temperature of the object.
- the spectrum of the thermal radiation light from the annealing target 30, which is an actual object changes depending on the temperature of the annealing target 30. Therefore, the intensity of the thermal radiation light in the wavelength range measured by the sensor 25 also changes depending on the temperature of the annealing target 30.
- the measurement result of the thermal radiation light by the sensor 25 is input to the processing unit 40 as a voltage value.
- the lens 23 and the lens 24 image the surface of the annealing object 30 on the light receiving surface of the sensor 25. Thereby, the intensity of the thermal radiation light radiated from the region of the surface of the annealing object 30 having a conjugate relationship with the light receiving surface of the sensor 25 is measured.
- the area of the surface to be measured is set so as to be included in the beam spot of the laser beam, for example.
- the processing unit 40 controls the scanning mechanism 12 to move the annealing target object 30 held on the holding table 13 in the two-dimensional direction within the horizontal plane. Further, based on the current position information of the holding table 13, the laser light source 20 is controlled so that the laser light source 20 outputs a pulsed laser beam. When the pulsed laser beam is output while moving the annealing object 30, the heated portion moves within the surface of the annealing object 30.
- the processing unit 40 synchronizes with each shot of the pulsed laser beam output from the laser light source 20, and a waveform showing the temporal change in the intensity of the thermal radiation light from the detection result of the sensor 25 for each irradiation of the pulsed laser beam.
- waveform of intensity of heat radiation light The acquired waveform of the intensity of the thermal radiation light is stored in the storage device 41 in association with the in-plane position of the annealing object 30.
- one laser pulse (first pulse) is made incident, and after the extremely short delay time has elapsed, the process of making the next laser pulse (second pulse) be made incident is performed once, and a plurality of times is performed. Repeat irradiation. The incidence of the second pulse is performed during the period when the influence of heat generation due to the incidence of the first pulse remains.
- the annealing in which two laser pulses are combined and irradiated once is referred to as "double pulse annealing" in this specification.
- the processing unit 40 outputs the information of the intensity distribution of the thermal radiation light in the surface of the annealing target 30 to the output device 42 as an image, a graph, or a numerical value.
- the output device 42 includes a display unit that displays an image.
- FIG. 2 is a graph showing an example of the waveform of the thermal radiation light observed in one irradiation of the pulsed laser beam, with the timing chart of the laser pulse superimposed.
- the horizontal axis represents the elapsed time, and the vertical axis represents the output voltage of the sensor 25.
- the time change of the output voltage of the sensor 25 can be considered as the time change of the temperature of the annealing object 30.
- the temperature of the annealing object 30 rises, and the peak P1 appears. At this point, the temperature of the surface of the annealing object 30 reaches the melting point. When the surface temperature reaches the melting point, melting starts on the surface of the annealing object 30.
- a slightly flat part B1 following the peak P1 indicates a period in which the energy input by the incidence of the first pulse LP1 is consumed as heat of fusion. The energy input is consumed as heat of fusion, which promotes melting in the depth direction. Since the incidence of the first pulse LP1 continues during this period, the temperature gradually rises. When the incidence of the first pulse LP1 ends, the temperature starts to drop and solidification starts.
- the temperature of the annealing object 30 rises again by the incidence of the second pulse LP2, and the peak P2 appears. At this time, the surface of the annealing object 30 is remelted. Then, the melting proceeds in the depth direction. While the second pulse LP2 is incident, the output voltage of the sensor 25 (FIG. 1) rises and then begins to fall.
- the following two points can be considered as the reason why the output voltage of the sensor 25 rises after the peak P2 appears.
- the first point is that the surface of the annealing object 30 is melted to become a liquid, so that the temperature becomes higher and the intensity of the radiated light becomes stronger than when the surface is solid.
- a second point is that the intensity of the radiated light observed by the sensor 25 increases as the area of the melted portion of the observation target region where the intensity of the radiated light is detected by the sensor 25 increases.
- the output voltage of the sensor 25 increases due to the above two reasons.
- the temperature continues to drop and solidification progresses from the deep region to the shallow region.
- the peak P3 that appears when the temperature is gradually decreasing is considered to be because the heat generated by the phase transition from the liquid phase to the solid phase was observed as a temporary temperature increase when solidification proceeded to the surface. .. Therefore, the elapsed time from the peak P2 to the peak P3 corresponds to the melting time by the incidence of the second pulse LP2.
- FIG. 3 is a graph showing an example of the relationship between melting time and melting depth.
- the relationship between the melting time and the melting depth can be obtained by performing an evaluation experiment in which the evaluation sample is actually annealed. Hereinafter, an example of the evaluation experiment will be described.
- the melting depth can be determined by measuring the dopant concentration distribution in the depth direction of the semiconductor wafer.
- the dopant concentration distribution in the depth direction can be measured by, for example, secondary ion mass spectrometry (SIMS).
- SIMS secondary ion mass spectrometry
- FIG. 3 shows the relationship between the melting time and the melting depth obtained by actually performing an evaluation experiment.
- the evaluation experiment was performed under three conditions of pulse energy density of 2.2 J/cm 2 , 1.8 J/cm 2 , and 1.4 J/cm 2 .
- the actual measurement result is shown by a circle symbol and its approximate curve is also shown.
- the relationship between the melting time and the melting depth shown in FIG. 3 is stored in the storage device 41 in advance.
- FIG. 4 is a flowchart of the annealing method according to the embodiment.
- the processing unit 40 controls the laser light source 20 to start the output of the pulse laser beam.
- the scanning mechanism 12 is controlled to start the movement of the annealing object 30 held on the holding table 13 (step S1). As a result, the scanning of the surface of the annealing object 30 with the pulsed laser beam is started.
- the processing unit 40 reads the measured value of the intensity of the heat radiation light from the sensor 25, and stores the read result in the storage device 41 in association with the incident position of the pulse laser beam (step S2).
- Step S2 is executed until the entire surface of the annealing object 30 is scanned with the pulsed laser beam (step S3).
- the processing unit 40 ends the output of the pulse laser beam from the laser light source 20. Further, the movement of the holding table 13 by the scanning mechanism 12 is completed (step S4).
- the processing unit 40 reads the measured value of the intensity of the thermal radiation light stored in the storage device 41, and estimates the annealing result based on the waveform of the intensity of the thermal radiation light (step S5).
- the melting time is calculated based on the characteristic shape of the waveform of the intensity of the heat radiation light. For example, the peak P2 and the peak P3 of the waveform shown in FIG. 2 are detected, and the elapsed time from the peak P2 to the peak P3, that is, the melting time by the second pulse is calculated. Then, based on the calculated melting time and the relationship between the melting time and the melting depth shown in FIG. 3, the melting depth for each position in the surface of the annealing object 30 is estimated.
- the processing unit 40 After the estimation of the annealing result, the processing unit 40 outputs the estimation result to the output device 42. For example, the distribution of the melting depth in the surface of the annealing object 30 is displayed in a color-coded image.
- FIG. 5 is a diagram showing an example of an image displayed on the output device 42.
- the surface of the annealing object 30 is color-coded according to the melting depth and displayed on the display screen.
- the excellent effect of this embodiment will be described.
- the operator can determine whether or not the annealing process is normal by looking at the information displayed on the output device 42.
- the melting time can also be obtained by making the reference light incident on the surface of the annealing target 30 and detecting the intensity of the reflected light.
- the intensity of the thermal radiation light emitted from the annealing object 30 during the normal annealing process is detected, and thus the reference light is applied to the annealing object 30.
- the melting depth can be estimated without disposing an optical system for incidence.
- the annealing result is estimated based on the waveform of the thermal radiation light in step S5.
- the process of estimating the annealing result for the region where the laser pulse is incident may be executed in parallel.
- the double pulse annealing method was applied, but it is not always necessary to apply this method.
- one irradiation may be completed by injecting one laser pulse.
- two peaks P1 and P2 corresponding to the start of melting do not appear in the waveform of the intensity of the heat radiation light shown in FIG. 2, but only one peak appears.
- the time from one peak corresponding to the start of melting to the peak P3 corresponding to complete solidification may be considered as the melting time.
- three or more laser pulses may be incident on the object to be annealed 30 with an extremely short delay time.
- the laser light source 20, the transmission optical system 21, and the lens 23 shown in FIG. 1 function as a heating unit that heats the annealing target 30.
- the pulsed laser beam for the annealing has a wavelength in the green wavelength range, but a pulsed laser beam in another wavelength range which can melt the surface layer of the annealing object 30 may be used. .. Further, instead of the pulsed laser beam for heating, another energy beam may be used. As described above, an apparatus having a heating function other than the laser light source may be used as the heating unit.
- the processing unit 40 estimates the annealing result and outputs the estimation result to the output device 42. It is preferable that the processing unit 40 has a function of estimating the annealing result (melting depth) and further determining the quality of the annealing process based on the estimation result of the melting depth. For example, the processing unit 40 determines that the annealing process is defective when the melting depth is out of the allowable range, and determines that the annealing result is good when the melting depth is within the allowable range. Good to do.
- the processing unit 40 performs a process of advancing the annealing object 30 after the annealing process to the next process, and if it is determined that the annealing result is poor, the processing unit 40 outputs A warning may be issued from the device 42 to inform the operator of the occurrence of the defect.
- FIGS. 6A and 6B an annealing apparatus and an annealing method according to another embodiment will be described with reference to FIGS. 6A and 6B.
- the description of the configuration common to the annealing apparatus and the annealing method according to the embodiments described with reference to FIGS. 1 to 5 will be omitted.
- the characteristic shape of the intensity waveform of the heat radiation light is detected, and the melting time is calculated based on that shape.
- the melting time is calculated based on the area of the waveform of the intensity of the heat radiation light. A method of calculating the melting time from the waveform of the intensity of the heat radiation light will be described with reference to FIGS. 6A and 6B.
- FIG. 6A is a graph showing the waveform of the actually measured intensity of thermal radiation light.
- the horizontal axis represents the elapsed time in the unit of “ns”, and the vertical axis represents the output voltage of the sensor 25 (FIG. 1) in the unit of “mV”. That is, the vertical axis of the graph shown in FIG. 6 represents the intensity of heat radiation light.
- Thin solid line e1 in the graph, the broken line e2, and a thick solid line e3, respectively pulse energy density 1.4J / cm 2, 1.8J / cm 2, when the annealing was performed under a condition of 2.2 J / cm 2
- the waveform of the intensity of thermal radiation is shown.
- FIG. 6B is a graph showing the relationship between the melting time obtained from the waveform shown in FIG. 6A and the area of the waveform of the intensity of heat radiation light.
- the horizontal axis represents the melting time in the unit of “ns”, and the vertical axis represents the area of the waveform in the unit of “nWb”.
- the area of the waveform the area from the time when the waveform rises from the base level by the incidence of the first pulse to the time when the incidence of the second pulse ends and the waveform returns to the base level is adopted.
- the melting time t and the area S of the waveform have a substantially linear relationship.
- the following approximate expression is derived from the graph shown in FIG. 6B.
- S and t represent the area of the waveform and the melting time, respectively.
- a and C are constants.
- the melting time t can be obtained from the calculation result of the area S of the waveform and the graph of the relationship shown in FIG. 6B or the equation (1).
- the melting depth can be obtained based on the relationship shown in FIG.
- the melting depth can be estimated by calculating the area of the waveform without detecting the characteristic shape of the waveform of the intensity of the heat radiation light.
- the area of the waveform can be calculated, for example, by simply adding the output voltage values obtained from the sensor 25 (FIG. 1) in predetermined time intervals.
- the process of calculating the area of the waveform is completed in a shorter time than the process of detecting the characteristic shape of the waveform. Therefore, when the method according to the present embodiment is used, it is possible to in-line inspect all of the objects to be annealed 30 each time the annealing process is completed.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- High Energy & Nuclear Physics (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Recrystallisation Techniques (AREA)
- Laser Beam Processing (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
Description
アニール対象物の表面を加熱して表層部を一時的に溶融させる加熱部と、
前記加熱部によって加熱された前記アニール対象物からの熱放射光を検出するセンサと、
前記センサによって検出された熱放射光の強度の時間変化を示す波形に基づいて、前記アニール対象物のアニール結果を推定する処理部と
を有するアニール装置が提供される。
アニール対象物の表面の一部を加熱して表層部を溶融させ、
前記アニール対象物の加熱された箇所からの熱放射光の強度の時間変化を示す波形に基づいて、前記アニール対象物のアニール結果を推定するアニール方法が提供される。
保持テーブル13にアニール対象物30を保持させた後、処理部40がレーザ光源20を制御して、パルスレーザビームの出力を開始させる。さらに、走査機構12を制御して保持テーブル13に保持されているアニール対象物30の移動を開始させる(ステップS1)。これにより、アニール対象物30の表面の、パルスレーザビームによる走査が開始される。
本実施例では、アニール処理後に他の装置でシート抵抗の測定や、広がり抵抗の測定を行うことなくアニール処理時に一時的に溶融した部分の溶融深さの分布を推定することができる。オペレータは、出力装置42に表示された情報を見て、アニール処理が正常であったか否かを判定することができる。
上記実施例では、ステップS4においてアニール対象物30に対するアニール処理が終了した後に、ステップS5において熱放射光の波形に基づいてアニール結果を推定している。レーザパルスの入射ごとにステップS2で熱放射光の強度の測定が終了したら、レーザパルスが入射した領域についてアニール結果を推定する処理を行うことが可能である。従って、アニールを行っている期間に、既にアニールが終了した領域のアニール結果を推定する処理を並行して実行してもよい。
本実施例では、熱放射光の強度の波形の特徴的な形状を検出することなく、波形の面積を算出することにより、溶融深さを推定することができる。波形の面積の算出は、例えば、センサ25(図1)から所定の時間刻み幅で得られた出力電圧値を単純に足し合わせることにより行うことができる。これに対し、波形の特徴的な形状を検出するには、波形に重畳されているノイズを除去する処理、微分演算、比較判定処理等を行わなければならない。従って、波形の面積を算出する処理は、波形の特徴的な形状を検出する処理に比べて短時間で完了する。このため、本実施例による方法を用いると、アニール対象物30のアニール処理が終了するごとに、全数をインライン検査することが可能になる。
11 レーザ透過窓
12 走査機構
13 保持テーブル
20 レーザ光源
21 伝送光学系
22 ダイクロイックミラー
23、24 レンズ
25 センサ
30 アニール対象物
40 処理部
41 記憶装置
42 出力装置
Claims (6)
- アニール対象物の表面を加熱して表層部を一時的に溶融させる加熱部と、
前記加熱部によって加熱された前記アニール対象物からの熱放射光を検出するセンサと、
前記センサによって検出された熱放射光の強度の時間変化を示す波形に基づいて、前記アニール対象物のアニール結果を推定する処理部と
を有するアニール装置。 - 前記処理部は、前記センサで検出された熱放射光の強度の時間変化を示す波形の特徴的な形状に基づいて、前記アニール対象物の表層部の溶融時間を求め、溶融時間に基づいて前記アニール対象物の表層部の溶融深さを推定する請求項1に記載のアニール装置。
- 前記処理部は、前記センサで検出された熱放射光の強度の時間変化を示す波形の面積に基づいて、前記アニール対象物の表層部の溶融深さを推定する請求項1に記載のアニール装置。
- さらに、画像を表示する表示部を有し、
前記加熱部は、前記アニール対象物の表面上において加熱箇所を移動させ、
前記処理部は、前記アニール対象物の表面内の位置と、推定された溶融深さとを関連付けて、溶融深さの分布を前記表示部に表示する請求項2または3に記載のアニール装置。 - 前記処理部は、前記センサによって検出された熱放射光の強度に基づいてアニール結果の良否を判定する請求項1乃至4のいずれか1項に記載のアニール装置。
- アニール対象物の表面の一部を加熱して表層部を溶融させ、
前記アニール対象物の加熱された箇所からの熱放射光の強度の時間変化を示す波形に基づいて、前記アニール対象物のアニール結果を推定するアニール方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201980080294.4A CN113169053A (zh) | 2018-12-03 | 2019-11-20 | 退火装置及退火方法 |
KR1020217016678A KR102646994B1 (ko) | 2018-12-03 | 2019-11-20 | 어닐링장치 및 어닐링방법 |
JP2020559897A JP7384826B2 (ja) | 2018-12-03 | 2019-11-20 | アニール装置及びアニール方法 |
EP19893052.1A EP3893269B1 (en) | 2018-12-03 | 2019-11-20 | Annealing device and annealing method |
US17/336,932 US20210287921A1 (en) | 2018-12-03 | 2021-06-02 | Annealing device and annealing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018226435 | 2018-12-03 | ||
JP2018-226435 | 2018-12-03 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/336,932 Continuation US20210287921A1 (en) | 2018-12-03 | 2021-06-02 | Annealing device and annealing method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020116169A1 true WO2020116169A1 (ja) | 2020-06-11 |
Family
ID=70975479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2019/045461 WO2020116169A1 (ja) | 2018-12-03 | 2019-11-20 | アニール装置及びアニール方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20210287921A1 (ja) |
EP (1) | EP3893269B1 (ja) |
JP (1) | JP7384826B2 (ja) |
KR (1) | KR102646994B1 (ja) |
CN (1) | CN113169053A (ja) |
TW (2) | TWI783612B (ja) |
WO (1) | WO2020116169A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112687538A (zh) * | 2020-12-18 | 2021-04-20 | 北京华卓精科科技股份有限公司 | 激光退火熔化深度确定方法、装置及电子设备 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11890807B1 (en) | 2017-08-31 | 2024-02-06 | Blue Origin, Llc | Systems and methods for controlling additive manufacturing processes |
US11819943B1 (en) * | 2019-03-28 | 2023-11-21 | Blue Origin Llc | Laser material fusion under vacuum, and associated systems and methods |
WO2023215046A1 (en) * | 2022-05-03 | 2023-11-09 | Veeco Instruments Inc. | Scatter melt detection systems and methods of using the same |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003273040A (ja) * | 2002-03-19 | 2003-09-26 | Komatsu Ltd | レーザアニーリング方法及びその装置 |
JP2008117877A (ja) * | 2006-11-02 | 2008-05-22 | Sumitomo Heavy Ind Ltd | レーザアニール装置、アニール方法、及び溶融深さ測定装置 |
JP2008211136A (ja) * | 2007-02-28 | 2008-09-11 | Sumitomo Heavy Ind Ltd | レーザアニール装置及びアニール方法 |
JP2013512572A (ja) * | 2009-11-30 | 2013-04-11 | アプライド マテリアルズ インコーポレイテッド | 半導体用途のための結晶化処理 |
JP2013074019A (ja) | 2011-09-27 | 2013-04-22 | Sumitomo Heavy Ind Ltd | レーザアニール装置及びレーザアニール方法 |
JP2013258288A (ja) * | 2012-06-13 | 2013-12-26 | Sumitomo Heavy Ind Ltd | 半導体装置の製造方法及びレーザアニール装置 |
JP2017022333A (ja) * | 2015-07-15 | 2017-01-26 | 住友重機械工業株式会社 | レーザアニール装置及びレーザアニール方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002139697A (ja) * | 2000-11-02 | 2002-05-17 | Mitsubishi Electric Corp | 複数レーザビームを用いたレーザ光学系とレーザアニーリング装置 |
TWI382795B (zh) * | 2005-03-04 | 2013-01-11 | Hitachi Via Mechanics Ltd | A method of opening a printed circuit board and an opening device for a printed circuit board |
JP2011014685A (ja) * | 2009-07-01 | 2011-01-20 | Sumitomo Heavy Ind Ltd | レーザ照射装置、及びレーザ照射方法 |
US10083843B2 (en) * | 2014-12-17 | 2018-09-25 | Ultratech, Inc. | Laser annealing systems and methods with ultra-short dwell times |
-
2019
- 2019-10-14 TW TW110128737A patent/TWI783612B/zh active
- 2019-10-14 TW TW108136795A patent/TWI737004B/zh active
- 2019-11-20 KR KR1020217016678A patent/KR102646994B1/ko active IP Right Grant
- 2019-11-20 EP EP19893052.1A patent/EP3893269B1/en active Active
- 2019-11-20 WO PCT/JP2019/045461 patent/WO2020116169A1/ja unknown
- 2019-11-20 JP JP2020559897A patent/JP7384826B2/ja active Active
- 2019-11-20 CN CN201980080294.4A patent/CN113169053A/zh active Pending
-
2021
- 2021-06-02 US US17/336,932 patent/US20210287921A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003273040A (ja) * | 2002-03-19 | 2003-09-26 | Komatsu Ltd | レーザアニーリング方法及びその装置 |
JP2008117877A (ja) * | 2006-11-02 | 2008-05-22 | Sumitomo Heavy Ind Ltd | レーザアニール装置、アニール方法、及び溶融深さ測定装置 |
JP2008211136A (ja) * | 2007-02-28 | 2008-09-11 | Sumitomo Heavy Ind Ltd | レーザアニール装置及びアニール方法 |
JP2013512572A (ja) * | 2009-11-30 | 2013-04-11 | アプライド マテリアルズ インコーポレイテッド | 半導体用途のための結晶化処理 |
JP2013074019A (ja) | 2011-09-27 | 2013-04-22 | Sumitomo Heavy Ind Ltd | レーザアニール装置及びレーザアニール方法 |
JP2013258288A (ja) * | 2012-06-13 | 2013-12-26 | Sumitomo Heavy Ind Ltd | 半導体装置の製造方法及びレーザアニール装置 |
JP2017022333A (ja) * | 2015-07-15 | 2017-01-26 | 住友重機械工業株式会社 | レーザアニール装置及びレーザアニール方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112687538A (zh) * | 2020-12-18 | 2021-04-20 | 北京华卓精科科技股份有限公司 | 激光退火熔化深度确定方法、装置及电子设备 |
CN112687538B (zh) * | 2020-12-18 | 2024-03-08 | 北京华卓精科科技股份有限公司 | 激光退火熔化深度确定方法、装置及电子设备 |
Also Published As
Publication number | Publication date |
---|---|
TW202147389A (zh) | 2021-12-16 |
JP7384826B2 (ja) | 2023-11-21 |
TW202022923A (zh) | 2020-06-16 |
JPWO2020116169A1 (ja) | 2021-10-14 |
TWI783612B (zh) | 2022-11-11 |
CN113169053A (zh) | 2021-07-23 |
TWI737004B (zh) | 2021-08-21 |
KR20210072115A (ko) | 2021-06-16 |
EP3893269B1 (en) | 2023-11-01 |
EP3893269A1 (en) | 2021-10-13 |
EP3893269A4 (en) | 2022-02-23 |
US20210287921A1 (en) | 2021-09-16 |
KR102646994B1 (ko) | 2024-03-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2020116169A1 (ja) | アニール装置及びアニール方法 | |
JP5105903B2 (ja) | レーザアニール装置及びアニール方法 | |
CN102307696B (zh) | 用于通过激光能量照射半导体材料表面的方法和设备 | |
KR102400216B1 (ko) | 체류시간이 단축된 레이저 어닐링 시스템 및 방법 | |
JP5963701B2 (ja) | 半導体アニール装置及び温度測定方法 | |
JP5071961B2 (ja) | レーザアニール装置、アニール方法、及び溶融深さ測定装置 | |
JP5058180B2 (ja) | 基板上に構成された薄層材料を、能動的高温測定を使用して特性化する方法および装置 | |
JP2016002580A (ja) | レーザの焦点ずれ検査方法 | |
JP5177994B2 (ja) | 温度計測装置、及び温度算出方法 | |
JP2011003630A (ja) | レーザ照射装置、及びレーザ照射方法 | |
CN110392618A (zh) | 激光加工装置 | |
JP6452564B2 (ja) | レーザアニール装置及びレーザアニール方法 | |
CN108022853B (zh) | 激光退火装置 | |
US10088365B2 (en) | Laser annealing apparatus | |
JP2012011402A (ja) | ワークの加工方法、ワークの加工用光照射装置およびそれに用いるプログラム | |
Bomschlegel et al. | In-situ analysis of heat accumulation during ultrashort pulsed laser ablation | |
JP4614747B2 (ja) | 半導体装置の製造方法 | |
CN111433892B (zh) | 卡盘板、退火装置及退火方法 | |
JP2014029965A (ja) | 被処理体表面のモニタリング方法およびモニタリング装置 | |
EP3315242A1 (en) | Laser annealing apparatus | |
JP2016219584A (ja) | レーザアニール装置 | |
JP6957099B2 (ja) | レーザアニール装置及びシート抵抗算出装置 | |
CN115298802A (zh) | 进程监视器及进程监视方法 | |
JP2021086847A (ja) | レーザアニール装置、キャリア密度算出装置、及びキャリア密度計測方法 | |
JP2008091230A (ja) | 電子ビーム表面処理装置および表面処理方法 |
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: 19893052 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2020559897 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20217016678 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2019893052 Country of ref document: EP Effective date: 20210705 |