WO2013176396A1 - 단결정 실리콘 잉곳 및 웨이퍼, 그 잉곳 성장 장치 및 방법 - Google Patents
단결정 실리콘 잉곳 및 웨이퍼, 그 잉곳 성장 장치 및 방법 Download PDFInfo
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- WO2013176396A1 WO2013176396A1 PCT/KR2013/002710 KR2013002710W WO2013176396A1 WO 2013176396 A1 WO2013176396 A1 WO 2013176396A1 KR 2013002710 W KR2013002710 W KR 2013002710W WO 2013176396 A1 WO2013176396 A1 WO 2013176396A1
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
- C30B15/14—Heating of the melt or the crystallised materials
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
- C30B15/20—Controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B30/00—Production of single crystals or homogeneous polycrystalline material with defined structure characterised by the action of electric or magnetic fields, wave energy or other specific physical conditions
- C30B30/04—Production of single crystals or homogeneous polycrystalline material with defined structure characterised by the action of electric or magnetic fields, wave energy or other specific physical conditions using magnetic fields
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
- Y10T117/10—Apparatus
- Y10T117/1024—Apparatus for crystallization from liquid or supercritical state
- Y10T117/1032—Seed pulling
- Y10T117/1068—Seed pulling including heating or cooling details [e.g., shield configuration]
Definitions
- Embodiments relate to single crystal silicon ingots and wafers, and to apparatus and methods for growing the ingots.
- a floating zone (FZ) method or a CZochralski (CZ: CZochralski) method is widely used as a method of manufacturing a silicon wafer.
- FZ floating zone
- CZ CZochralski
- the polycrystalline silicon is charged into a quartz crucible, the graphite heating element is heated to melt it, the seed crystal is immersed in the silicon melt formed as a result of the melting, and the crystallization occurs at the interface of the melt to form the seed crystal.
- the graphite heating element is heated to melt it
- the seed crystal is immersed in the silicon melt formed as a result of the melting, and the crystallization occurs at the interface of the melt to form the seed crystal.
- a single crystal silicon ingot is grown.
- the grown single crystal silicon ingot is then sliced, etched and polished into wafer form.
- V represents the pulling speed of the single crystal silicon ingot
- G represents the vertical temperature gradient near the solid-liquid interface
- the V region is a region in which vacancy is excessive due to lack of silicon atoms.
- the single crystal silicon ingot is pulled up to a V / G smaller than a predetermined threshold, the single crystal silicon ingot is grown to an O band region in which an oxidation induced stacking fault (OSF) exists.
- OSF oxidation induced stacking fault
- the single crystal ingot grows in the interstitial region (hereinafter referred to as 'I region') due to the dislocation loop where silicon between the lattice is collected. do.
- the region I is a region in which agglomerates of silicon between lattice are large due to excess of silicon atoms.
- VDP region Between the V region and the I region, there is a vacancy dominant defect free region (hereinafter, referred to as 'VDP region') and an interstitial dominant defect region (hereinafter referred to as 'IDP region').
- 'VDP region' vacancy dominant defect free region
- 'IDP region' interstitial dominant defect region
- the VDP region and the IDP region are the same in that they are regions of no lack or excess of silicon atoms, but the VDP region contains oxygen precipitation nuclei, while the IDP region does not contain oxygen precipitation nuclei.
- a small void area that belongs to the O band and has a fine sized vacancy defect, for example a direct surface oxide defect (DSOD).
- DSOD direct surface oxide defect
- the corresponding V / G must be maintained while growing the single crystal silicon ingot.
- the silicon wafer is cut out from the growing ingot, and the crystal defects of the cut wafer are evaluated to examine whether the ingot is growing as desired at the corresponding V / G. Based on the V / G, the single crystal ingot is grown in the VDP region or the IDP region.
- RIE reactive ion etching
- Cu copper
- the control and management of fine crystal defects occurring during the growth of single crystal silicon ingots becomes very important. For example, growth of an ingot having only crystal defects having a desired fineness is required even in defect regions such as a VDP region and an IDP region.
- a DRAM Dynamic Random Access Memory
- a NAND flash memory or the like, it is required that the silicon wafer have a crystal defect of a size smaller than 20 nm while the line width is narrowed to 20 nm or less.
- the various conventional crystal defect evaluation methods described above can only detect crystal defects having a size larger than 30 nm and cannot properly evaluate crystal defects smaller than 30 nm.
- the existing crystal defect evaluation method only evaluates crystal defects having a size smaller than 30 nm as defects having the same size in a batch. Therefore, there is a problem that it is difficult to manufacture a silicon wafer or ingot having a crystal defect of a size smaller than 30 nm, for example, 10 nm to 29 nm.
- the examples provide silicon single crystal ingots and wafers with crystal defects of finer size less than 30 nm.
- Another embodiment provides a silicon single crystal ingot growth apparatus and method for fabricating a silicon wafer having microscopic crystal defects.
- the single crystal silicon ingot and wafer of the embodiment have a transition region that predominantly has a crystal defect having a size of 10 nm to 30 nm among the crystal defects included in at least one of the vacancy predominant defect regions and the interstitial predominant defect regions. It includes.
- crystal defects having a size of 10 nm to 30 nm are more than 50%.
- crystal defects having a size of 10 nm to 30 nm occupy 70% or more.
- the transition region does not include ring-shaped oxide organic stacking defects.
- the single crystal silicon ingot and wafer are manufactured by the Czochralski method.
- the size of the crystal defect included in the transition region is 10 nm to 19 nm.
- the interstitial predominant defect region occupies 100x% (where 0 ⁇ x ⁇ 1) in the entire transition region, and the baconic predominant defect region is 100 in the entire transition region. (1-x) occupies%.
- the interstitial predominant defect free area occupies at least 70% of the entire transition area.
- the dominant defect free vacancy region occupies 30% or less of the entire transition region.
- the vacancy predominant defect region is located at the edge of the single crystal silicon ingot and the wafer and the interstitial predominant defect region is located at the center inside the edge of the single crystal silicon ingot and the wafer.
- the dominant defect free vacancy region occupies 70% or more of the entire transition region.
- the interstitial predominant defect free area occupies 30% or less of the entire transition area.
- the interstitial predominant defect region is located at the edge of the single crystal silicon ingot and the wafer and the vacancy predominant defect region is located centrally inside the edge of the single crystal silicon ingot and the wafer.
- the size of the crystal defect contained in the transition region can be detected by the magic method.
- the size of the crystal defect included in the transition region can be detected by the magic method in a state in which the single crystal silicon ingot and the wafer are not heat-treated.
- the pixel number 1 indicates a crystal defect having a size of 10 nm to 19 nm.
- the single crystal silicon ingot growth apparatus includes a crucible for accommodating silicon melt, a heater installed around the crucible to apply heat to the crucible, and a maximum magnetic field plan (MGP) at a position determined according to the position of the maximum heating part of the heater. It includes a magnetic field applying unit for applying a magnetic field to the crucible to form a).
- MGP maximum magnetic field plan
- the single crystal silicon ingot growth apparatus may include: a first controller configured to change the position of the maximum heating part by controlling the heater; And a second control unit controlling the magnetic field applying unit so that the MGP is formed at a position adjusted according to the changed position of the maximum heating unit.
- the heater may uniformly generate heat in the vertical direction or adjust the amount of heat generated in the vertical direction.
- the MGP is located at a lower position than the maximum heating portion.
- the MGP is located 20% to 40% lower than the position of the maximum heating part with respect to the interface of the silicon melt.
- the MGP is located 50 mm to 300 mm lower than the interface of the silicon melt.
- the strength of the magnetic field applied to the crucible by the magnetic field applying unit may be 2000 to 3400 gauss.
- the target pulling speed margin of the grown single crystal silicon ingot may be 0.010 mm / min to 0.030 mm / min.
- the single crystal silicon ingot according to the embodiment performed in the single crystal silicon ingot growth apparatus having a crucible containing a silicon melt, a heater installed around the crucible to apply heat to the crucible, and a magnetic field applying portion for applying a magnetic field to the crucible
- the growth method may further include determining a position of a maximum heating part of the heater; Determining a position of a maximum magnetic field plan (MGP) according to the determined position of the maximum heating part; And applying the magnetic field to the crucible so that the MGP is formed at the determined position.
- MGP maximum magnetic field plan
- the single crystal silicon ingot growth method may include: adjusting the position of the MGP according to the changed position of the maximum heating portion when the position of the maximum heating portion is changed; And applying the magnetic field to the crucible to form the MGP at the adjusted position.
- the magnetic field is applied to the crucible to form the MGP at a lower position than the maximum heat generating portion.
- the magnetic field is applied to the crucible to form the MGP at a position 20% to 40% lower than the position of the maximum heat generating portion based on the interface of the silicon melt.
- the magnetic field is applied to the crucible to form the MGP at 50 mm to 300 mm lower than the interface of the silicon melt.
- the strength of the magnetic field applied to the crucible may be 2000 to 3400 gauss.
- the target pulling speed margin of the grown single crystal silicon ingot may be 0.010 mm / min to 0.030 mm / min.
- the single crystal silicon ingot growth apparatus 33.
- a heater that heats the crucible so that the silicon in the crucible is melted;
- An impression portion for pulling up while rotating the single crystal silicon ingot;
- a rotational angular velocity calculator configured to calculate a rotational angular velocity of the single crystal silicon ingot;
- a first comparing unit comparing the calculated rotational angular velocity with a target rotational angular velocity and outputting the compared result as an angular velocity error value;
- a flow rate controller configured to adjust a flow rate of the molten silicon in a portion where the diameter of the grown single crystal silicon ingot is sensed according to the angular velocity error value;
- a diameter sensing unit configured to sense the diameter of the single crystal silicon ingot.
- the single crystal silicon ingot growth apparatus further includes a second comparison unit which compares the sensed diameter with a target diameter and outputs the compared result as a diameter error value, wherein the pulling unit has a pulling speed that is variable according to the diameter error value.
- the single crystal ingot is pulled while rotating.
- a single crystal silicon ingot growth apparatus including a crucible containing molten silicon for growing a single crystal silicon ingot, a heater to heat the silicon in the crucible to melt the silicon, and an impression portion that is pulled while rotating the single crystal silicon ingot.
- Single crystal silicon ingot growth method performed in the step, measuring the rotational angular velocity of the single crystal silicon ingot; Determining an angular velocity error value by comparing the measured rotational angular velocity with a target rotational angular velocity; Adjusting the flow rate of the molten silicon in a portion where the diameter of the grown single crystal silicon ingot is sensed using the angular velocity error value; And sensing the diameter of the single crystal silicon ingot.
- the single crystal silicon ingot growth method may further include determining a diameter error value by comparing the sensed diameter with a target diameter; And varying the pulling rate of the grown single crystal silicon ingot using the diameter error value.
- the flow velocity is reduced and adjusted.
- the diameter sensing portion corresponds to the meniscus of the molten silicon, and the flow rate of the meniscus is stabilized by reducing the flow rate of the molten silicon.
- the pulling speed margin of the grown single crystal silicon ingot may be 0.020 mm / min to 0.030 mm / min.
- the high-quality silicon single crystal ingots and wafers for semiconductors of the embodiment can detect crystal defects having a smaller size of less than 30 nm using the magic method, so that crystal defects having a size smaller than 30 nm, for example, 10 nm to 19 nm, are used. It can be formed into a transition region containing a can be used in a semiconductor device having a line width narrowed to 20 nm or less.
- the single crystal silicon growth method and apparatus of the embodiment controls the pulling speed after stabilizing the flow of the meniscus in which the diameter of the single crystal silicon ingot is sensed, so that the pulling speed can be more accurately controlled, and the maximum magnetic field plan
- the maximum magnetic field plan In addition to determining the position of the (MGP) based on the position of the maximum heating part, and controlling the convection of the silicon melt by appropriately adjusting the strength of the magnetic field, it promotes the recombination of the bacon and interstitial to increase the margin of the IDP region You can.
- 1 is a view schematically showing the distribution of crystal defect regions according to V / G during growth of a single crystal silicon ingot.
- FIG. 2 is a view showing a single crystal ingot growth apparatus according to the embodiment.
- 3 is a diagram showing the growth rate and the distribution of crystal defects of the single crystal silicon ingot according to the present embodiment.
- FIG. 4 is a plan view of a single crystal silicon ingot and a wafer according to the embodiment.
- FIG. 5 is a plan view of a single crystal silicon ingot and a wafer according to another embodiment.
- FIGS. 6A and 6C show images of the wafer sample taken by the magic method.
- FIG. 7 is a graph in which a relationship between each pixel and a volume of an image acquired by the magic method is analyzed by TEM.
- FIG. 8 illustrates an image of a crystal defect corresponding to pixel 1 photographed using a TEM.
- 9 is a graph showing a histogram of pixels.
- FIG. 10 is a flowchart for explaining a method of growing a single crystal silicon ingot according to the embodiment.
- 11A and 11B are graphs showing the trajectory of the pulling speed of the ingot.
- FIG. 12 is a diagram showing a margin of the pulling speed according to the present embodiment and the present embodiment.
- FIG. 13 is a flowchart for explaining a method of growing a single crystal silicon ingot according to another embodiment.
- FIG. 14A shows the maximum value of the IDP margin according to the position of the MGP
- FIG. 14B shows a 70% value of the maximum value of the IDP margin according to the position of the MGP.
- FIG. 15A shows the maximum value of the IDP margin according to the strength of the magnetic field
- FIG. 15B shows the 70% value of the maximum value of the IDP margin according to the strength of the magnetic field.
- FIG. 2 is a view showing the single crystal ingot growth apparatus 100 according to the embodiment.
- the single crystal ingot growth apparatus 100 shown in FIG. 2 includes a crucible 10, a support shaft driver 16, a support rotation shaft 18, a silicon melt 20, an ingot 30, a seed crystal 32, and wire pulling.
- the rotational angular velocity calculator 92, the first comparator 94, the flow rate controller 96, the second comparator 110, and the first and second controllers 120 and 130 are included.
- the single crystal silicon ingot growth apparatus 100 grows the single crystal silicon ingot 30 as follows by the CZ method.
- the high-purity polycrystalline raw material of silicon in the crucible 10 is heated by the heater 60 above the melting point temperature, and changed into the silicon melt 20.
- the crucible 10 containing the silicon melt 20 has a double structure in which the inside is made of quartz 12 and the outside is made of graphite 14.
- the pulling unit 40 releases the pulling wire 42 to contact or immerse the tip of the seed crystal 32 at approximately the center of the surface of the silicon melt 20.
- the silicon seed crystals 32 may be held using a seed chuck (not shown).
- the support shaft drive unit 16 rotates the support rotation shaft 18 of the crucible 20 in the same direction as the arrow, while the pull unit 40 is pulled while rotating the ingot 30 by the pulling wire 42. To foster. At this time, it is possible to complete the columnar single crystal silicon ingot 30 by adjusting the speed (V) and the temperature gradient (G, ⁇ G) to pull the ingot 30.
- the thermal member 50 is disposed to surround the ingot 30 between the single crystal silicon ingot 30 and the crucible 10 and serves to block heat radiated from the ingot 30.
- 3 is a diagram showing the growth rate and the distribution of crystal defects of the single crystal silicon ingot according to the present embodiment.
- the transition region is defined as a region that predominantly has crystal defects having a size of 10 nm to 30 nm among the crystal defects included in at least one of the VDP region and the IDP region.
- the predominance may mean more than 50%. That is, among the total crystal defects included in the transition region, crystal defects having a size of 10 nm to 30 nm may be more than 50%. That is, among the total crystal defects included in the transition region, crystal defects having a size of 10 nm to 30 nm may occupy k% or more (where 50 ⁇ k ⁇ 100).
- the size of crystal defects predominantly included in the transition region may be between 10 nm and 19 nm.
- Such a transition region may not include crystal defects belonging to an O band or an I region which is a ring-shaped oxidized organic stacked defect region.
- the ingot according to the present embodiment (30) or the silicon wafer may predominantly have crystal defects of the size of 10 nm to 30 nm.
- FIG. 4 shows a plan view of a single crystal silicon ingot and a wafer 5A according to an embodiment
- FIG. 5 shows a plan view of a single crystal silicon ingot and a wafer 5B according to another embodiment.
- the ingot 30 or silicon wafer 5A is crystalline defect as shown in FIG. It can have a distribution. In this case, the distribution of the transition region of the silicon wafer 5A spans both the VDP region 142 and the IDP region 140.
- the silicon wafer 5B has a crystal defect distribution as shown in FIG. Can be.
- the distribution of the transition region of the silicon wafer 5B spans only the IDP region 150. In other words, the distribution of the transition region of the silicon wafer 5B does not span the VDP region.
- the distribution of the transition region of the silicon wafer spans only the VDP region. In other words, the distribution of the transition region of the silicon wafer does not span the IDP region.
- the IDP region may occupy m% in the entire transition region as in Equation 1 below, and the VDP region may occupy n% in the entire transition region as in Equation 2 below.
- the IDP region may occupy 70% or more of the entire transition region, and the VDP region may occupy less than 30% of the entire transition region.
- the VDP region is positioned at the edge of the silicon wafer 5A and the IDP region is positioned at the center of the inner edge of the silicon wafer 5A.
- the VDP region may occupy 70% or more of the entire transition region, and the IDP region may occupy less than 30% of the entire transition region.
- the IDP region may be located on the edge of the silicon wafer and the VDP region may be located in the center of the inner edge of the silicon wafer.
- the present invention is not limited thereto, and in the transition region of the silicon wafer, the VDP region and the IDP region may be located in various forms.
- the ingot 30 can be grown to V / G out of the T (VG) initially set by various factors. Therefore, it is necessary to evaluate whether the ingot 30 is grown in a transition region which predominantly has crystal defects having a desired size of 10 nm to 30 nm. To this end, the present embodiment uses the Magics method.
- the existing Magics method has only been used to evaluate the source of defects.
- the applicant has detected the size of the crystal defect by the following method using the above-mentioned magic method.
- a wafer sample is prepared by cutting the ingot in a horizontal direction perpendicular to the growing direction of the ingot.
- FIGS. 6A and 6C show images of the wafer sample taken by the magic method.
- the image obtained by the magic method displays pixels separated by different colors, but since the drawing is shown in black and white, the color of pixel 1 is circled for convenience of understanding.
- the color of the pixel 2 is displayed by dividing by ⁇ , and the color of the pixel 3 is displayed by dividing by ⁇ .
- the image of FIGS. 6B and 6C may display only a few pixels (ie, pixels 1 to 3), but may not be limited thereto.
- the existing crystal defect evaluation method for example, the Cu haze method, as shown in Fig. 6A, the VDP region is displayed in black and the IDP region is displayed in white in the wafer sample. Therefore, according to the Cu haze method, it was not possible to evaluate how predominantly a crystal defect having a size smaller than 30 nm among the crystal defects contained in the VDP region and the IDP region. That is, according to the existing crystal defect evaluation method, a silicon wafer formed of a transition region having predominantly only crystal defects having sizes of 10 nm to 19 nm smaller than 30 nm could not be produced.
- the wafer sample predominantly has a crystal defect having a size smaller than 30 nm.
- photographing a wafer sample with a camera results in an image as illustrated in FIG. 6B or 6C showing pixels of different colors (eg, pixels 1 to 3).
- the applicant reviewed the image shown in FIG. 6B or 6C with a scanning electron microscope (SEM), and then observed with a transmission electron microscope (TEM) to determine the pixel-by-pixel determination.
- SEM scanning electron microscope
- TEM transmission electron microscope
- FIG. 7 is a graph in which the relationship between each pixel and volume of an image obtained by the magic method is analyzed by TEM, where the horizontal axis represents pixel number and the vertical axis represents volume.
- the correlation coefficient (R 2 ) is 0.9
- each pixel was photographed by a TEM as shown in FIG. 8 to evaluate the size of the crystal defects for each pixel.
- many pixels were photographed by TEM, and it was found that the size of each pixel defect had a correlation as shown in FIG. 7. Referring to FIG. 7, it can be seen that as the number of pixels decreases, the volume of crystal defects decreases. This suggests that the smaller the pixel number, the smaller the size of the crystal defect. 8, it can be seen that the size of the crystal defect of the pixel 1 has a size of approximately 10 nm to 19 nm.
- the specific size of the crystal defect with a size smaller than 30 nm which cannot be previously evaluated can be detected through the pixel displayed on the image photographed by the magic method.
- FIG. 9 is a graph showing a histogram of pixels, where the horizontal axis represents pixel numbers and the vertical axis represents the frequency (or density) of each pixel.
- a histogram of each pixel as shown in FIG. 9 is generated from the image of the wafer sample. The frequency of each pixel number in the histogram can then be evaluated to determine the size of the crystal defects contained in the wafer sample.
- the colors (o, ⁇ , ⁇ ) from pixel 1 to pixel 3 are displayed at the edges, while the color of pixel 1 (o is located at the center inside the edge. ) Is only displayed.
- the histogram curve 200 illustrated in FIG. 9 is obtained from the image illustrated in FIG. 6B.
- the critical frequency is determined according to the degree of preponderance.
- the threshold frequency means k% of the total number of pixels. That is, in this case, since the ingot 30 is growing to V / G in T (VG), the wafer sample shown in Fig. 6B is a silicon wafer formed as a transition region in which crystal defects of a desired size are predominant.
- V / G becomes a little lower in T (VG)
- the image of the wafer sample taken by the magic method may be as shown in FIG. 6C.
- the silicon wafer since the silicon wafer was formed in the transition region in which the crystal defects of the IDP region predominantly included, it is also a pass.
- the silicon wafer according to the present embodiment can be manufactured by lowering the V / G value out of T (VG) by ⁇ V / G so that the ingot 30 grows to V / G in T (VG).
- ⁇ V / G can be easily obtained.
- ⁇ V / G can be obtained by subtracting V / G corresponding to the size of the crystal defect corresponding to the pixel 1 from V / G corresponding to the size of the crystal defect corresponding to the pixel 2.
- ⁇ V / G is adjusted so that the frequency of pixel 1 is greater than the frequency of pixel 2 (202-> 200)
- the frequency distribution increases. Therefore, in consideration of this, it is possible to determine the value of ⁇ V / G.
- the silicon wafer according to the present embodiment can be precisely adjusted so that V / G falls within T (VG). It can be seen that only the transition region having a crystalline defect of 10 nm to 30 nm in size among the crystal defects included in at least one of the VDP region and the IDP region is formed.
- an additional pretreatment step such as heat treatment of the wafer sample does not need to be performed. Therefore, the wafer sample can be evaluated more quickly and immediately fed back to reflect the growing ingot growth process, thereby reducing the production time.
- FIG. 10 is a flowchart for explaining a single crystal silicon ingot growth method according to the embodiment.
- the rotational angular velocity of the single crystal silicon ingot 30 is calculated (step 302).
- the rotational angular velocity calculating unit 92 uses the speed at which the ingot 30 provided from the pulling unit 40 rotates and the diameter of the sensed ingot 30 provided from the sensor 90, thereby increasing the ingot 30. Can calculate the rotational angular velocity of
- the first comparator 94 compares the rotational angular velocity calculated by the rotational angular velocity calculator 92 with the target rotational angular velocity TSR, and compares the result to the flow rate controller 96 as an angular velocity error value. Output (step 304).
- the flow rate control unit 96 determines the diameter of the molten silicon 20 in the portion 34 where the diameter of the grown single crystal silicon ingot 30 is sensed according to the angular velocity error value received from the first comparator 94. Reduce the flow rate (step 306). To this end, the flow rate controller 96 may control the pulling unit 40 and / or the support shaft driver 16 to reduce the flow rate. That is, the flow rate control unit 96 controls the rotational speed of the ingot 30 through the pulling unit 40 and the rotational speed of the crucible 10 through the support shaft drive unit 16.
- the flow rate control unit 96 decreases the flow velocity.
- the portion 34 of which the diameter is sensed corresponds to the meniscus of the silicon melt 20, the flow rate of the silicon melt 20 may be reduced to stabilize the flow of the meniscus.
- the diameter sensing unit 90 senses the diameter of the single crystal silicon ingot 30 (operation 308).
- the second comparator 110 compares the diameter sensed by the diameter sensing unit 90 with the target diameter TD, and outputs the compared result as the diameter error value to the pulling unit 40 ( Step 310).
- the pulling unit 40 varies the pulling speed of the grown single crystal silicon ingot 30 according to the diameter error value and pulls it while rotating the single crystal silicon ingot 30 at the variable pulling speed. Step 312).
- the pulling speed of the grown single crystal silicon ingot 30 can be adjusted.
- 11A and 11B are graphs showing the trajectory of the pulling speed V of the ingot 30, wherein the horizontal axis represents time and the vertical axis represents the pulling speed V.
- the P band represents a boundary between the small void region and the O band shown in FIG.
- the pulling unit 40 controls the pulling speed of the single crystal silicon ingot 30 according to the diameter sensed by the diameter sensing unit 90.
- the impression unit 40 may have the ingot 30 as the actual diameter of the ingot 30 is larger than the target diameter.
- the pulling unit 40 lowers the pulling speed of the ingot 30 by the measured diameter smaller than the target diameter.
- the maniscus 34 the portion of which the diameter is sensed, may be unstable because the flow rate of the node or molten silicon 20 generated during the growth of the ingot 30 is affected by the strength.
- the pulling speed is T (VG).
- the width 322 that fluctuates outside the target trajectory 320 of the pulling speed within can be very large.
- an ingot capable of defective processing including a crystal defect 336 in a P band (between the small void region and an O band region), a V region, or a crystal defect 334 in an I region ( 30) or the frequency of the silicon wafer may be increased (see 330).
- the pulling speed margin of the grown single crystal silicon ingot 30 is 0.010 mm / min to 0.030 mm of the present embodiment L2 from 0.015 mm / min to 0.016 mm / min of the existing L1. / min, for example 0.025 mm / min.
- FIG. 13 is a flowchart for explaining a method of growing a single crystal silicon ingot according to another embodiment.
- the first controller 120 determines the position 62 of the maximum heating part of the heater 60 (operation 402).
- the second controller 130 determines the position of the maximum magnetic field plan (MGP) according to the determined position 62 of the maximum heating part of the heater 60 received from the first controller 120. (Step 404).
- MGP means a portion where the horizontal component of the magnetic field generated from the magnetic field applying unit 80 is maximized.
- the magnetic field applying unit 80 is thermally cut off from the heater 60 by the heat insulating material 70.
- the heater 60 may uniformly generate heat in the vertical direction, or may adjust the amount of heat generated in the vertical direction. If the heater 60 generates heat uniformly in the vertical direction, the maximum heat generating part is located slightly above the center or the center of the heater 60. However, when the heater 60 can adjust the amount of heat generated in the up and down direction, the maximum heat generating portion can be arbitrarily adjusted.
- the second controller 130 controls the magnetic field applying unit 80 to apply the magnetic field to the crucible 10 so that the MGP is formed at the determined position (operation 406).
- the position of the MGP is adjusted according to the changed position 62 of the maximum heating unit (operation 410).
- the first controller 120 may control the heater 60 to change the position 62 of the maximum heating part.
- the position 62 of the maximum heating part may also change.
- the second controller 130 checks the changed position 62 of the maximum heating unit through the first controller 120 and adjusts the position where the MGP is to be formed according to the changed position.
- the second controller 130 controls the magnetic field applying unit 80 to form the MGP at the adjusted position and applies the magnetic field to the crucible 10 (operation 412).
- the MGP may be determined to be located below the position 62 of the maximum heating portion.
- the MGP may be located 20% to 40% lower than the position 62 of the maximum heating portion relative to the interface of the silicon melt 20. That is, if the position 62 of the maximum heat generating portion is spaced apart from the interface of the silicon melt 20 by the first distance D1, the MGP is 20% to 40 greater than the first distance D1 from the interface of the silicon melt 20.
- the second distance may be spaced apart by a second distance D2.
- the second distance D2 may be between 50 mm and 300 mm, for example 150 mm.
- FIG. 14A shows the maximum value of the IDP margin according to the position of the MGP
- FIG. 14B shows a 70% value of the maximum value of the IDP margin according to the position of the MGP.
- the horizontal axis represents the position of the MGP
- the position of the MGP is set to '0' at the interface of the silicon melt 20, and the negative value increases toward the bottom of the interface.
- REF of FIG. 14B indicates a reference value to be compared with the MGP according to the present embodiment.
- the MGP may be located at ⁇ 50 mm to ⁇ 300 mm, and when it is ⁇ 150 mm, the margin of the IDP may be maximized.
- the convection of the silicon melt 20 can be controlled by adjusting the position 62 of the maximum heat generating part and the position of the MGP, but also the silicon melt by the strength of the magnetic field applied by the magnetic field applying part 80.
- Convection of 20 can be controlled.
- the magnetic field applied to the crucible 10 by the magnetic field applying unit 80 may be 2000 to 3400 gauss, and when it is 2800 gauss, the IDP margin may be maximized.
- FIG. 15A shows the maximum value of the IDP margin according to the strength of the magnetic field
- FIG. 15B shows the 70% value of the maximum value of the IDP margin according to the strength of the magnetic field.
- the vertical axis represents IDP margin
- the horizontal axis represents Gaussian strength of the magnetic field.
- REF of FIG. 15B indicates a reference value to be compared with a Gaussian according to the present embodiment.
- the margin of the IDP may be increased from 0.007 mm / min to 0.010 mm / min to 0.030 mm / min, for example, from 0.020 mm / min to IDP margins can be improved by 0.022 mm / min.
- the length section of 1250 ° C to 1420 ° C which is a temperature region in which the IDP region is formed, is extended, which makes the silicon wafer fabrication conditions much easier.
- the concentration of oxygen contained in the ingot 30, formed between the ingot 30 and the silicon melt 20 The size of the subcooled region to be changed is changed, for example, when the rotational angular velocity of the silicon ingot 30 is increased, the interface of the silicon melt 20 becomes very convex, the temperature gradient G becomes large, and the temperature gradient difference ⁇ G ), And the concentration of oxygen is lowered to produce a good quality ingot 30, but
- convection of the silicon melt 20 causes the MGP to convex.
- the upper and lower parts may be blocked as a reference.
- the MGP is determined in consideration of the convection of the silicon melt according to the position of the maximum heating part, and the convection of the silicon melt 20 is controlled by appropriately adjusting the strength of the magnetic field. Therefore, it is possible to compensate for the above-described problem that may be caused while changing the rotational angular velocity. That is, when the MGP is 20% to 40% lower from the interface of the silicon melt 20 than the position 62 of the maximum heat generating site, convection becomes stronger toward the center of the ingot 30 in the direction of the arrow 22 so that the vacancy is increased. It is possible to secure the recombination interval between the and interstitial, which increases the margin of the IDP region.
- the apparatus shown in Fig. 2 was used to grow a silicon wafer or ingot formed into a transition region predominantly having crystal defects of the size of 10 nm to 30 nm.
- the growth apparatus shown in FIG. 2 performing the method shown in FIGS. 10 and 13 described above is merely exemplary, and for performing each step, an Automatic Growing Controller (AGC) (not shown) ) Or an automatic temperature controller (ATC) (not shown) may be used.
- ATC Automatic Growing Controller
- ATC automatic temperature controller
- the above-described single crystal silicon ingot growth method shown in Figs. 10 and 13 may be used simultaneously, and only one of them may be used.
- the pressure / flow rate of an inert gas such as argon gas which is a cooling gas, in addition to the rotational angular velocity of the single crystal silicon ingot 30, the MGP, the strength of the magnetic field, and the position of the maximum heat generating site.
- a melt gap between the interface of the heat shield member 50 and the silicon melt 20, the shape of the heat shield member 50, the number of heaters 60, and the rotational speed of the crucible 10 can be further used.
- This embodiment can be used to produce high quality single crystal silicon ingots and wafers for semiconductors having fine size crystal defects smaller than 30 nm.
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Abstract
Description
Claims (33)
- 베이컨시 우세 무결함 영역 및 인터스티셜 우세 무결함 영역 중 적어도 하나의 영역에 포함된 결정 결함 중 10 ㎚ 내지 30 ㎚의 크기의 결정 결함을 우세하게 갖는 전이 영역이 형성된 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항에 있어서, 상기 전이 영역에 포함된 전체 결정 결함 중 10 ㎚ 내지 30 ㎚의 크기의 결정 결함은 50 %보다 더 많은 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항에 있어서, 상기 전이 영역에 포함된 전체 결정 결함 중 10 ㎚ 내지 30 ㎚의 크기의 결정 결함이 70 % 이상을 차지하는 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항에 있어서, 상기 전이 영역은 링 모양의 산화 유기 적층 결함을 포함하지 않는 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항에 있어서, 초크랄스키법에 의해 제조된 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항에 있어서, 상기 전이 영역에 포함된 상기 결정 결함의 크기는 10 ㎚ 내지 19 ㎚인 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항에 있어서, 상기 단결정 실리콘 잉곳 및 웨이퍼에서, 상기 인터스티셜 우세 무결함 영역은 상기 전이 영역 전체에서 100x % (여기서, 0 ≤ x ≤ 1)를 차지하고, 상기 베이컨시 우세 무결함 영역은 상기 전이 영역 전체에서 100(1-x) %를 차지하는 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항에 있어서, 상기 단결정 실리콘 잉곳 및 웨이퍼의 지름을 기준으로, 상기 인터스티셜 우세 무결함 영역은 상기 전이 영역 전체의 70 % 이상을 차지하는 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항에 있어서, 상기 단결정 실리콘 잉곳 및 웨이퍼의 지름을 기준으로, 상기 베이컨시 우세 무결함 영역은 상기 전이 영역 전체의 30 % 이하를 차지하는 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항에 있어서, 상기 전이 영역에서, 상기 베이컨시 우세 무결함 영역은 상기 단결정 실리콘 잉곳 및 웨이퍼의 가장 자리에 위치하고 상기 인터스티셜 우세 무결함 영역은 상기 단결정 실리콘 잉곳 및 웨이퍼의 상기 가장 자리 안쪽의 중앙에 위치하는 단결정 실리콘 잉곳 및 웨이퍼.
- 제1 항 내지 제10 항 중 어느 한 항에 있어서, 상기 전이 영역에 포함된 상기 결정 결함의 크기는 매직스법에 의해 검출 가능한 단결정 실리콘 잉곳 및 웨이퍼.
- 제11 항에 있어서, 상기 전이 영역에 포함된 상기 결정 결함의 크기는 상기 단결정 실리콘 잉곳 및 웨이퍼를 열처리 하지 않은 상태에서 상기 매직스법에 의해 검출 가능한 단결정 실리콘 잉곳 및 웨이퍼.
- 제11 항에 있어서, 상기 매직스법에 의해 촬영된 영상에서 픽셀 번호 1번은 10 ㎚ 내지 19 ㎚ 크기의 결정 결함을 나타내는 단결정 실리콘 잉곳 및 웨이퍼.
- 실리콘 융액을 수용하는 도가니;상기 도가니의 주위에 설치되어 상기 도가니에 열을 가하는 히터; 및상기 히터의 최대 발열부의 위치에 따라 결정된 위치에 최대 자기장 플랜(MGP)가 형성되도록 상기 도가니에 자기장을 인가하는 자기장 인가부를 포함하는 단결정 실리콘 잉곳 성장 장치.
- 제14 항에 있어서, 상기 단결정 실리콘 잉곳 성장 장치는상기 히터를 제어하여, 상기 최대 발열부의 위치를 변경하는 제1 제어부; 및상기 최대 발열부의 변경된 위치에 따라 조정된 위치에 상기 MGP가 형성되도록 상기 자기장 인가부를 제어하는 제2 제어부를 더 포함하는 단결정 실리콘 잉곳 성장 장치.
- 제14 항에 있어서, 상기 히터는 상하 방향으로 발열량을 조절 가능한 단결정 실리콘 잉곳 성장 장치.
- 제14 항에 있어서, 상기 MGP는 상기 최대 발열부의 위치보다 낮은 곳에 위치하는 단결정 실리콘 잉곳 성장 장치.
- 제17 항에 있어서, 상기 MGP는 상기 실리콘 융액의 계면을 기준으로 상기 최대 발열부의 위치보다 20 % 내지 40 % 낮은 곳에 위치하는 단결정 실리콘 잉곳 성장 장치.
- 제14 항에 있어서, 상기 MGP는 상기 실리콘 융액의 계면보다 50 ㎜ 내지 300 ㎜ 낮은 곳에 위치하는 단결정 실리콘 잉곳 성장 장치.
- 제14 항에 있어서, 상기 성장되는 단결정 실리콘 잉곳의 목표 인상 속도 마진은 0.010 ㎜/min 내지 0.030 ㎜/min 인 단결정 실리콘 잉곳 성장 장치.
- 실리콘 융액을 수용하는 도가니, 상기 도가니의 주위에 설치되어 상기 도가니에 열을 가하는 히터 및 상기 도가니에 자기장을 인가하는 자기장 인가부를 갖는 단결정 실리콘 잉곳 성장 장치에서 수행되는 단결정 실리콘 잉곳 성장 방법에 있어서,상기 히터의 최대 발열부의 위치를 결정하는 단계;상기 최대 발열부의 결정된 위치에 따라 최대 자기장 플랜(MGP)의 위치를 결정하는 단계; 및상기 결정된 위치에 상기 MGP가 형성되도록 상기 자기장을 상기 도가니에 인가하는 단계를 포함하는 단결정 실리콘 잉곳 성장 방법.
- 제21 항에 있어서, 상기 단결정 실리콘 잉곳 성장 방법은상기 최대 발열부의 위치가 변경되었을 때, 상기 최대 발열부의 변경된 위치에 따라 상기 MGP의 위치를 조정하는 단계; 및상기 자기장을 상기 도가니에 인가하여 상기 조정된 위치에 상기 MGP를 형성하는 단계를 더 포함하는 단결정 실리콘 잉곳 성장 방법.
- 제21 항에 있어서, 상기 자기장을 상기 도가니에 인가하여, 상기 최대 발열부의 위치보다 낮은 곳에 상기 MGP를 형성하는 단결정 실리콘 잉곳 성장 방법.
- 제21 항에 있어서, 상기 자기장을 상기 도가니에 인가하여, 상기 실리콘 융액의 계면을 기준으로 상기 최대 발열부의 위치보다 20 % 내지 40 % 낮은 위치에 상기 MGP를 형성하는 단결정 실리콘 잉곳 성장 방법.
- 제21 항에 있어서, 상기 자기장을 상기 도가니에 인가하여, 상기 실리콘 융액의 계면보다 50 ㎜ 내지 300 ㎜ 낮은 곳에 상기 MGP를 형성하는 단결정 실리콘 잉곳 성장 방법.
- 제25 항에 있어서, 상기 성장되는 단결정 실리콘 잉곳의 목표 인상 속도 마진은 0.010 ㎜/min 내지 0.030 ㎜/min 인 단결정 실리콘 잉곳 성장 방법.
- 단결정 실리콘 잉곳을 성장시키기 위한 용융 실리콘을 담는 도가니;상기 도가니 내의 실리콘이 용융되도록, 상기 도가니에 열을 가하는 히터;상기 단결정 실리콘 잉곳을 회전시키면서 인상시키는 인상부;상기 단결정 실리콘 잉곳의 회전 각속도를 계산하는 회전 각속도 계산부;상기 계산된 회전 각속도를 목표 회전 각속도와 비교하고, 비교된 결과를 각속도 에러값으로서 출력하는 제1 비교부;상기 각속도 에러값에 따라, 상기 성장되는 단결정 실리콘 잉곳의 직경이 센싱되는 부분에 상기 용융 실리콘의 유속을 조정하는 유속 제어부; 및상기 단결정 실리콘 잉곳의 직경을 센싱하는 직경 센싱부를 포함하는 단결정 실리콘 잉곳 성장 장치.
- 제27 항에 있어서, 상기 단결정 실리콘 잉곳 성장 장치는상기 센싱된 직경과 목표 직경을 비교하고, 비교된 결과를 직경 에러값으로서 출력하는 제2 비교부를 더 포함하고,상기 인상부는 상기 직경 에러값에 따라 가변된 인상 속도로 상기 단결정 잉곳을 회전시키면서 인상하는 단결정 실리콘 잉곳 성장 장치.
- 단결정 실리콘 잉곳을 성장시키기 위한 용융 실리콘을 담는 도가니, 상기 도가니 내의 실리콘에 열을 가하여 상기 실리콘이 용융되도록 하는 히터, 및 상기 단결정 실리콘 잉곳을 회전시키면서 인상하는 인상부를 포함하는 단결정 실리콘 잉곳 성장 장치에서 수행되는 단결정 실리콘 잉곳 성장 방법에 있어서,상기 단결정 실리콘 잉곳의 회전 각속도를 측정하는 단계;상기 측정된 회전 각속도를 목표 회전 각속도와 비교하여 각속도 에러값을 결정하는 단계;상기 각속도 에러값을 이용하여, 상기 성장되는 단결정 실리콘 잉곳의 직경이 센싱되는 부분에 상기 용융 실리콘의 유속을 조정하는 단계; 및상기 단결정 실리콘 잉곳의 직경을 센싱하는 단계를 포함하는 단결정 실리콘 잉곳 성장 방법.
- 제29 항에 있어서, 상기 단결정 실리콘 잉곳 성장 방법은상기 센싱된 직경과 목표 직경을 비교하여 직경 에러값을 결정하는 단계; 및상기 직경 에러값을 이용하여, 상기 성장되는 단결정 실리콘 잉곳의 인상 속도를 가변시키는 단계를 더 포함하는 단결정 실리콘 잉곳 성장 방법.
- 제29 항에 있어서, 상기 측정된 회전 각속도가 상기 목표 회전 각속도보다 클 때, 상기 유속을 감소시켜 조정하는 단결정 실리콘 잉곳 성장 방법.
- 제29 항에 있어서, 상기 직경이 센싱되는 부분은 상기 용융 실리콘의 메니스커스에 해당하고,상기 용융 실리콘의 유속을 감소시켜 상기 메니스커스의 유동이 안정화되는 단결정 실리콘 잉곳 성장 방법.
- 제29 항에 있어서, 상기 성장되는 단결정 실리콘 잉곳의 인상 속도 마진은 0.020 ㎜/min 내지 0.030 ㎜/min인 단결정 실리콘 잉곳 성장 방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112013002642.2T DE112013002642T5 (de) | 2012-05-23 | 2013-04-02 | Einkristall-Silizium-lngot und Wafer und Vorrichtung und Verfahren zum Wachsenlassen des Ingots |
US14/402,405 US20150147258A1 (en) | 2012-05-23 | 2013-04-02 | Single crystal silicon ingot and wafer, and apparatus and method for growing said ingot |
JP2015512563A JP2015519285A (ja) | 2012-05-23 | 2013-04-02 | 単結晶シリコンインゴット及びウエハ、そのインゴット成長装置及び方法 |
CN201380026674.2A CN104334774A (zh) | 2012-05-23 | 2013-04-02 | 单晶硅晶锭和晶片以及用于生长所述晶锭的装置和方法 |
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KR1020120054652A KR101379798B1 (ko) | 2012-05-23 | 2012-05-23 | 단결정 실리콘 잉곳 성장 장치 및 방법 |
KR1020120054653A KR101379799B1 (ko) | 2012-05-23 | 2012-05-23 | 단결정 실리콘 잉곳 성장 장치 및 방법 |
KR10-2012-0054654 | 2012-05-23 | ||
KR10-2012-0054652 | 2012-05-23 | ||
KR1020120054654A KR101366154B1 (ko) | 2012-05-23 | 2012-05-23 | 반도체용 고품질 실리콘 단결정 잉곳 및 웨이퍼 |
KR10-2012-0054653 | 2012-05-23 |
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US (1) | US20150147258A1 (ko) |
JP (1) | JP2015519285A (ko) |
CN (1) | CN104334774A (ko) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160160388A1 (en) * | 2013-05-21 | 2016-06-09 | Lg Siltron Inc. | Silicon single crystal ingot and wafer for semiconductor |
US20180094359A1 (en) * | 2015-04-14 | 2018-04-05 | Sk Siltron Co., Ltd. | Apparatus and meth0d for growing silicon single crystal ingot |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10141413B2 (en) * | 2013-03-13 | 2018-11-27 | Taiwan Semiconductor Manufacturing Co., Ltd. | Wafer strength by control of uniformity of edge bulk micro defects |
JP6052189B2 (ja) * | 2014-01-16 | 2016-12-27 | 信越半導体株式会社 | シリコン単結晶ウェーハの熱処理方法 |
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- 2013-04-02 US US14/402,405 patent/US20150147258A1/en not_active Abandoned
- 2013-04-02 WO PCT/KR2013/002710 patent/WO2013176396A1/ko active Application Filing
- 2013-04-02 JP JP2015512563A patent/JP2015519285A/ja active Pending
- 2013-04-02 CN CN201380026674.2A patent/CN104334774A/zh active Pending
- 2013-04-02 DE DE112013002642.2T patent/DE112013002642T5/de not_active Ceased
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Also Published As
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US20150147258A1 (en) | 2015-05-28 |
DE112013002642T5 (de) | 2015-03-19 |
JP2015519285A (ja) | 2015-07-09 |
CN104334774A (zh) | 2015-02-04 |
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