WO2007142024A1 - 単結晶シリコンウェーハのcop評価方法 - Google Patents
単結晶シリコンウェーハのcop評価方法 Download PDFInfo
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- WO2007142024A1 WO2007142024A1 PCT/JP2007/060425 JP2007060425W WO2007142024A1 WO 2007142024 A1 WO2007142024 A1 WO 2007142024A1 JP 2007060425 W JP2007060425 W JP 2007060425W WO 2007142024 A1 WO2007142024 A1 WO 2007142024A1
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- 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
- H01L22/24—Optical enhancement of defects or not directly visible states, e.g. selective electrolytic deposition, bubbles in liquids, light emission, colour change
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- 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
-
- 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
Definitions
- the present invention relates to a COP (Crystal Originated Particle) evaluation method for a single crystal silicon wafer, particularly a large-diameter silicon wafer having a diameter of 300 mm.
- COP Crystal Originated Particle
- a single crystal silicon wafer as a substrate of a semiconductor device is manufactured by being cut from a single crystal ingot of silicon and subjected to many physical, chemical and thermal treatments.
- a single crystal ingot of silicon is generally obtained by a Chiyoklarsky method (hereinafter referred to as “CZ method”) in which a seed crystal is immersed in molten silicon in a quartz crucible and pulled up to grow a single crystal. During crystal growth, fine defects called Grown-in defects are introduced into the crystal.
- This Grown-in defect depends on the pulling rate during single crystal growth and the temperature distribution in the single crystal immediately after solidification (temperature gradient in the crystal in the pulling axis direction), and COP (Crystal Originated Particle) These exist in single crystals as vacancy aggregation defects with a size of about 0.1 to 0.2 m, or as dislocation clusters with a size of about 10 ⁇ m.
- OSF acid-induced stacking fault
- the leakage current causes deterioration of device characteristics.
- COP is a factor that lowers the initial pressure resistance of the oxide film, and dislocation clusters also cause poor characteristics of the devices formed there.
- COP detection methods generally include a method using a surface defect inspection apparatus (eg, SP2: manufactured by KLA-Tencor) and a method called a copper deposition method (copper decoration method). Used.
- SP2 surface defect inspection apparatus
- copper deposition method copper decoration method
- COP here refers to COP as a Grown —in defect introduced into a crystal during the above-mentioned single crystal growth (hereinafter referred to as “COP”, and when particularly distinguished, COP ”).
- Other COPs caused by fine scratches, pulling scratches, etc. that occur during wafer handling, etc. are hereinafter referred to as “non-crystalline COPs” Is not an essential defect derived from the silicon single crystal itself! /, So it is excluded from the COP evaluation.
- pattern refers to the fact that the thermal history of the single crystal silicon ingot to be grown is targeted for the pulling axis, and that the pulling rate and the distribution of grown-in defects have a specific relationship.
- a COP caused by the crystal generated due to the presence, generally the force appearing in a disk shape at the center of the wafer (disk pattern), whether it appears in a ring shape at the outer periphery (ring pattern), Or both appear together (ring disk pattern).
- disk pattern disk pattern
- ring pattern ring shape
- it does not take the form of a turn and may appear densely on the entire surface of the wafer.
- the present invention has been made in view of such a situation, and it is based on a clear standard for a single-crystal silicon wafer having a large diameter of 300 mm, which has very few grown-in defects.
- the objective is to provide an objective and quantitative COP evaluation method for single crystal silicon wafers that can determine the presence or absence of patterns.
- the gist of the present invention resides in the following COP evaluation method for a single crystal silicon wafer.
- a COP evaluation method for a single crystal silicon wafer in which the wafer evaluation area is concentrically divided in a radial direction, and an upper limit value of the number of COPs is set for each of the divided evaluation areas.
- This is a COP evaluation method for single crystal silicon wafers that performs pass / fail judgment.
- the above-mentioned “single crystal silicon wafer” is mainly a silicon wafer having a diameter of 300 mm.
- this evaluation method is an evaluation method mainly for large-diameter silicon wafers with a diameter of 300 mm or more.
- the silicon wafer targeted by this evaluation method is that even if COP exists on the surface of the wafer, they are concentrated locally to form the above pattern, or the number of the entire surface of the wafer is extremely large. Unless otherwise specified, it is acceptable as a wafer for highly integrated IC production.
- Embodiment 1 In this COP evaluation method for a single crystal silicon wafer, a method of rejecting when the number of COPs in the central region and the outer peripheral region of the evaluation regions divided concentrically exceeds the upper limit ( Embodiment 1) can be employed.
- the number of COPs on the entire surface of the woofer can be set to a predetermined upper limit or less (Embodiment 3).
- the COP evaluation method for a single crystal silicon wafer according to the present invention is a method in which the wafer evaluation region is concentrically divided in the radial direction, and an upper limit value of the number of COPs is set for each evaluation region. It is a certain evaluation method. According to this method, for example, with the current judgment method, it is regarded as a disk pattern with several COPs, and it can be judged that there is no pattern (pass) based on clear criteria for a wafer that fails. .
- this evaluation method is based on a clear and quantitative standard, it can also support automation of COP evaluation (inspection).
- the evaluation criteria such as the width of the wafer division area and the upper limit value of the number of COPs in each area can be flexibly reviewed in consideration of the occurrence of COP, etc. is there.
- Fig. 1 is a diagram showing an example of the occurrence of non-crystalline COP in woofer, where (a) is a COP extending in a curved line or dotted line, and (b) is a COP generated locally in spots. It is.
- Fig. 2 is a diagram showing another example of non-crystalline COP in woofer.
- Figure 3 shows the COP evaluation results for defect-free crystal silicon wafers.
- Fig. 4 is a diagram showing an example of a judgment that was rejected despite the fact that it was a non-crystalline COP according to the current judgment criteria.
- FIG. 5 is a diagram showing the results of the determination based on the new standard 1.
- Figure 6 shows a sample that was properly remedied under New Standard 1 and an oversampled sample.
- (a) is an example of appropriate relief
- (b) and (c) are examples of excessive relief.
- Fig. 7 shows the COP density for each measurement region of the entire sample.
- Figure 8 shows the failure rate according to the new standard 2 divided into regions.
- Figure 9 shows the failure rate according to the new standard 3 divided into regions.
- Figure 10 shows an example of a sample that was determined to be acceptable according to the current standards, but was rejected according to the new standard 2, where (a) shows an example with a disk pattern and (b) shows a ring pattern. This is an example.
- Figure 11 shows an example of a sample that was over-relieved with the new standard 1 and over-relieved with the new standard 3.
- Figure 12 shows the failure rate according to the new standard 4 divided by region.
- the COP targeted by the present invention was processed by a copper deposition method using a Cu deposition apparatus, which will be described later, and then the wafer surface number count and distribution were measured by visual inspection.
- the COP evaluation method for a single crystal silicon wafer according to the present invention is a COP evaluation method for a single crystal silicon wafer as described above, wherein the wafer evaluation region is concentrically divided in a radial direction,
- an upper limit value for the number of COPs is set for each divided evaluation area, and pass / fail judgment is performed based on this upper limit value.
- the number of COPs for each divided evaluation area is less than the upper limit value in all areas, it is determined to be acceptable, and if the V difference is greater than the upper limit value in one or more areas, it is determined to be unacceptable.
- the wafer is divided concentrically in the radial direction, and the upper limit value of the number of COPs is set for each of the divided evaluation regions.
- the determination is performed based on a quantitative criterion. This is to make the judgment result objective by minimizing the fluctuations in the judgment result that may occur due to differences.
- the specific numerical value of the upper limit value to be set is not particularly defined. As will be described in detail later with specific examples, based on the results of conventional COP evaluation, the COP generation status, quality required for woofer, production yield, etc. will be determined.
- the method of the second embodiment is adopted in which the width of each evaluation region (that is, the ring) divided concentrically is within a range of 15 mm to 30 mm. desirable.
- the main target of this evaluation method is 300 mm diameter woofer. Normally, the outermost ring-shaped region with a width of 10 mm is excluded from the evaluation target. If the woofer diameter is 300 mm, the evaluation target region is from the center of the wafer to a radius of 140 mm. When this range is divided into rings, if the width is narrower than 15 mm, the area becomes too large and the evaluation becomes complicated, resulting in high costs.
- the width is larger than 30 mm, the evaluation becomes rough, and the accuracy of the evaluation tends to be impaired.
- the preferred width for a 300 mm diameter woofer is about 25 mm.
- the width of each evaluation area to be divided should normally be equal, but is not necessarily limited to this, and may be determined as appropriate based on the occurrence status of the COP.
- the method can be adopted. In other words, in this method, even if the wafer is seen in the radial direction and there is a COP in the middle, it is regarded as an amorphous COP.
- the specific ranges of the central region and the outer peripheral region are not particularly defined. You should set it as appropriate based on the occurrence status of COP and evaluation results!
- the diameter of a concentric circle having the same center as that of the wafer is ⁇ and the center region is a circle (disk) having a diameter of 0> ⁇ > 30 mm, and the outer peripheral region is ⁇
- the method of Embodiment 3 may be employed in which the number of COPs on the entire surface of the woofer is not more than a preset upper limit value.
- the total number of COPs in each divided evaluation area may be adjusted to the maximum number of COPs in the entire wafer area, and the total number of COPs in each evaluation area Apart from this total number, you may set an upper limit for the number of COPs on the entire wafer surface as described above.
- the COP generation factor excludes COPs that are determined to be due to factors other than defects introduced during crystal growth (that is, due to non-crystals). Pass / fail judgment. This is because the COP caused by non-crystals is not a defect inherent in wafers, unlike COP caused by crystals.
- Fig. 1 is a diagram schematically showing an example of the occurrence of amorphous COP in woofer.
- A is a COP extending in a curved line (indicated by symbol A in the figure) and a dotted line.
- Elongated COP (the part enclosed by the dashed ellipse)
- b is the COP (the part enclosed by the dashed ellipse) that appears locally.
- Fig. 1 shows an image of copper imaged by the above-described copper deposition method, which is generally used as a COP detection method, taken with an image scanner (Waha's macro inspection image input device). This is a figure drawn (sketched) based on the image, and the black dots indicate the location of the COP.
- the concentric circles on the image are auxiliary lines for area division in the present invention.
- the orthogonal line is an auxiliary line that divides the image into the first quadrant to the fourth quadrant (the same applies to FIGS. 2, 4, 6, 10, and 11 shown later).
- the copper deposition treatment was performed according to the following procedures (i) to ().
- the cu deposition apparatus includes an upper plate (electrode plate) and a lower plate (electrode plate) arranged at a predetermined interval, and an electrolyte solution (Cu 2) is contained in a space surrounded by both the plates and the side wall. It is configured so that a methanol solution in which + is eluted is contained, and a woofer is mounted on the lower plate so that a voltage can be applied between both plates (electrode plates).
- a Cu deposition treatment is performed. That is, using a Cu deposition device, a first voltage is applied so that the upper plate (electrode plate) has a negative potential with respect to the lower plate (electrode plate) (here, an insulating film having a thickness of 5 Onm is applied). Then, a second voltage is applied so that the upper plate (electrode plate) is at a positive potential (25V is applied to an insulating film having a thickness of 50 nm).
- the voltage application method used in (iii) is a voltage application method used in the wafer inspection method proposed by the applicant in Japanese Patent Application 2005-302199.
- the first voltage application step and the second voltage application method are as follows. By separating the application process, it has been confirmed that a single crystal silicon wafer with extremely few grown-in defects can be inspected with high reliability.
- the COP count on the wafer surface after treatment by the copper deposition method and COP evaluation judgment were performed by visual inspection.
- FIG. 1 (a) is an example of a COP determined to be caused by a pulling wound.
- Figure (b) is an example of a COP that occurs locally in spots, and it can be determined that there is a flaw in that part. These two examples are COP examples that can easily be attributed to non-crystallisation.
- FIG. 2 is a diagram showing another example of occurrence of non-crystalline COP in wafers.
- the COP that extends in the shape of a curve or dotted line illustrated in Fig. 1 or spots locally This is an example because it is difficult to determine that it is due to non-crystals because the COP is generated without any particular characteristics on the entire surface of the wafer.
- COP evaluation method of the present invention will be described below.
- COP counting COPs that can be easily determined to be non-crystalline as shown in Fig. 1 are excluded from the counting, and COPs as shown in Fig. 2 are highly likely to be non-crystalline. Because it was difficult to judge, it was counted as a defect (COP).
- a pass / fail decision was made in the heel region setting.
- the evaluation area was divided into a disk area with a diameter of 100 mm or less and a ring area with a diameter of 100 to 280 mm.
- the number of COPs set was set to 25 as the upper limit of the disk area with a diameter of 100 mm or less, and 50 as the upper limit of the ring area with a diameter of 100 to 280 mm.
- Table 1 shows the area classification and the upper limit of the number of COPs obtained in this way.
- ⁇ 100 means a disk-like region having a diameter of less than 100 mm
- ⁇ 100 to 280 means a ring-like region having a diameter of 100 mm to 280 mm. The same applies to Tables 2 to 4 described later.
- the new criterion 1 criterion it was found that there was a case where it was not possible to cope with the case where COP occurred locally because the R-direction region was rough. For example, in an area less than 100mm in diameter , Force that may result in a disc pattern even if the number of COPs is 25 or less.
- the area division is subdivided, and the upper limit value of the number of COPs is set in each area.
- the method for calculating the upper limit of the number of COPs was the same as in the new standard 1. However, when rounding, the total COP upper limit value for the area of less than 100 mm in diameter is the same as in the new standard 1 2
- Table 2 shows the upper limit of the area classification and the number of COPs.
- the upper limit of the number of COPs on the entire surface of the woofer is 75.
- the upper limit of the number of COPs on the entire wafer surface is 75.
- the new standard 3 was adjusted so that the upper limit of the number of COPs on the entire wafer surface was 100. At that time, while maintaining the ratio of the number of COPs between areas in the new standard 2, the number of COPs on the entire wafer surface was adjusted to 100.
- Table 3 shows the upper limit of the area classification and the number of COPs.
- Figure 3 shows the judgment results based on the current standards.
- the rejection rate is the ratio of rejected products to the total number of woofers used in the evaluation. The same applies to FIGS. 5, 8, 9, and 12 described later.
- R”, “D”, and “RD” on the horizontal axis are ratios of rejected products due to the presence of a ring pattern, a disk pattern, or a ring disk pattern, respectively. These do not overlap each other. Therefore, the “PATTERN” force, which is the sum of these three patterns, is the ratio of rejected products that are judged as S pattern failures. “Comprehensive” is a failure rate that includes not only pattern failures but also rejects due to the number of COPs on the entire wafer surface exceeding 100.
- Crystal origin means that it is difficult to determine whether the force is due to non-crystals or not. This is the rejection ratio due to the existence of only the COP caused by the crystal, which is excluded by judging the COP caused by the “COP generation factor judging method” devised by the present inventor. The same applies to FIG. 5, FIG. 8, FIG. 9, and FIG.
- FIG. 4 is a diagram showing a determination example in which the current determination criterion is rejected despite the non-crystal-induced COP.
- this wafer sample
- Figure 5 shows the results of the judgment based on the new standard 1.
- the “total” on the horizontal axis is the percentage of rejects due to over 100 COPs on the entire wafer surface.
- “ ⁇ 100” and “ ⁇ 100-280” were rejected according to the criteria shown in Table 1 above, and the failure rates for each region included overlapping ones.
- “New Standard 1” is the total (excluding duplication) of those that failed this standard.
- the failure rate is reduced by 0.046.
- the decrease in the failure rate is the sample that was relieved from the current standard (that is, the sample that was determined to be unsuccessful by the current standard was accepted by the new standard 1).
- Table 5 summarizes the number of samples with appropriate relief and the number of samples that are excessive (ie, should not be rescued !, those that have been rescued) by pattern.
- Figure 6 shows an example of a sample that has been properly relieved by the new standard 1 and a sample that has been excessively performed.
- A is an example that has been properly relieved
- (b) and ( c) is an example of excessive relief.
- Fig. 6 (a) is a sample that was rejected as a disc pattern was generated under the current standard, but was properly relieved and passed under the new standard 1.
- Figure (b) shows that, despite the appearance of the disk pattern, it was determined that the COP was caused by non-crystals (here, the COP generated locally due to processing) according to the new standard 1 and passed. It is a sample.
- Figure 6 (c) is determined to be a ring pattern based on the current standard, but according to the new standard 1, the COP in the region surrounded by the thick solid-line ellipse is determined to be a COP due to amorphous (processing).
- amorphous processing
- the new criteria 1 proved that the disc patterns and ring patterns that were supposed to be rejected were accepted. Therefore, we examined a method to improve the accuracy of pass / fail judgment.
- FIG. 7 is a diagram showing the COP density for each measurement region of the entire sample.
- the COP density is particularly large in the region of “ ⁇ 50” and the region of “ ⁇ 250-280”. This reflects the large distribution of COPs generated as disk patterns and ring patterns in the area. Therefore, in order to capture such patterns, it is necessary to evaluate the number of COPs by dividing into areas narrower than the areas classified by the new standard 1.
- New standard 2 is shown in Table 2
- new standard 3 is shown in Table 3.
- New Criteria 2 assigns the criteria of New Criteria 1 to the divided areas
- New Criteria 3 keeps the ratio of COP counts between the areas in New Criteria 2 while maintaining the COP count across the entire woofer. (Total number of COPs) is expanded from 75 to 100.
- FIG. 8 and Fig. 9 are diagrams showing the failure rates according to these new criteria divided by region.
- Figure 8 shows the failure rate according to the new criterion 2
- Fig. 9 shows the failure rate according to the new criterion 3.
- the failure rates in each region from “ ⁇ 50” to “ ⁇ 250 to ⁇ 280” on the horizontal axis were evaluated according to the criteria shown in Table 2 or Table 3, respectively.
- the failure rate for each area includes duplicates. “New Standard 2” or “New Standard 3” power on the horizontal axis The total (excluding duplication) of those that failed these standards.
- the judgment results based on the new standard 1 to the new standard 3 are characterized by an overall rejection rate of 0.082, 0.1619, 0.1272 in the j jets of the new standards 1, 2, and 3.
- the results of judgment based on the new standards 2 and 3 have a higher failure rate than the results of judgment based on the new standard 1. This difference is due to the fact that samples with “pattern” that should be rejected under the new standard 1 were judged to be acceptable, and the rejection rate was low. This is because the sample power of “with turn” is judged as rejected.
- Figure 10 shows an example of a sample that is judged as having no pattern (passed) according to the current standard, and having a pattern (failed) as judged by the new standard 2.
- (a) shows that there is a disk pattern.
- (B) is an example with a ring pattern.
- FIG. 11 is a diagram showing a sample that was excessively rescued by the new standard 1 and excessively rescued by the new standard 3.
- the new standard 4 was established.
- the upper limit of the number of COPs in the region ⁇ 50 is reduced from 10 to 8
- the number of COPs in the region ⁇ 250 ⁇ 280 is reduced. Increased the upper limit from 16 to 20.
- the number of COPs in the “ ⁇ 50-100” region was reduced from 23 to 21.
- FIG. 12 is a diagram showing the failure rate according to the new criterion 4 separately for each region.
- the rejection rate under the new standard 4 was 0.1387.
- the COP evaluation based on this new standard 4 there were no defects in pattern judgment as seen in the evaluation based on the new standard 1, 2 or 3.
- the new standards 1 to 4 are all COP criteria that specifically set the width of the evaluation area, the upper limit value in each evaluation area, etc. based on the provisions in the COP evaluation method of the present invention described above. In this case, the new standard 4 was the best evaluation standard.
- the past evaluation (inspection) results are taken into consideration in consideration of the occurrence (existence) state of COP in the manufactured woofer and the required quality level. Incorporating semi-empirical methods to be used, it is possible to establish specific criteria for the width of the woofer evaluation area, the upper limit of the number of COPs in each evaluation area, etc. It is essential.
- the pass / fail judgment is made based on this specific standard, so it depends on the subjectivity of the judge under a clear (quantitative) standard. It is possible to evaluate objectively. Therefore, it is possible to cope with the case where COP evaluation (inspection) is automatically performed.
- the COP evaluation method for a single crystal silicon wafer of the present invention it is possible to make a quantitative and objective evaluation, and an appropriate judgment can be given based on a clear standard.
- This evaluation method is fully compatible with the automation of COP evaluation (inspection) and the quality of woofers in the future, and can be widely used in the production of single crystal silicon wafers and semiconductor devices.
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN200780021544.4A CN101466876B (zh) | 2006-06-09 | 2007-05-22 | 单晶硅片的cop评价方法 |
KR1020117005488A KR101119721B1 (ko) | 2006-06-09 | 2007-05-22 | 단결정 실리콘 웨이퍼의 cop 평가 방법 |
JP2008520481A JP4640504B2 (ja) | 2006-06-09 | 2007-05-22 | 単結晶シリコンウェーハのcop評価方法 |
US12/308,060 US8173449B2 (en) | 2006-06-09 | 2007-05-22 | Method for making COP evaluation on single-crystal silicon wafer |
DE112007001361.3T DE112007001361B4 (de) | 2006-06-09 | 2007-05-22 | Verfahren zur Durchführung einer COP-Evaluierung an einem EinkristallSiliciumwafer |
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JP2006161094 | 2006-06-09 | ||
JP2006-161094 | 2006-06-09 |
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US (1) | US8173449B2 (ja) |
JP (1) | JP4640504B2 (ja) |
KR (2) | KR101119721B1 (ja) |
CN (1) | CN101466876B (ja) |
DE (1) | DE112007001361B4 (ja) |
TW (1) | TW200806969A (ja) |
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JP2010013306A (ja) * | 2008-07-02 | 2010-01-21 | Sumco Corp | 単結晶シリコンウェーハのcop発生要因の判定方法 |
JP2017072403A (ja) * | 2015-10-05 | 2017-04-13 | 株式会社Sumco | エピタキシャルウェーハ裏面検査装置およびそれを用いたエピタキシャルウェーハ裏面検査方法 |
JP2019007910A (ja) * | 2017-06-28 | 2019-01-17 | 株式会社東芝 | 結晶解析装置及び結晶解析方法 |
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CN101996851B (zh) * | 2009-08-20 | 2013-03-06 | 中芯国际集成电路制造(上海)有限公司 | 颗粒控制的方法 |
JP6341229B2 (ja) * | 2016-05-30 | 2018-06-13 | 株式会社Sumco | 結晶欠陥の評価方法、シリコンウェーハの製造方法及び結晶欠陥の評価装置 |
JP6897497B2 (ja) * | 2017-10-31 | 2021-06-30 | 株式会社Sumco | シリコンブロックの品質判定方法、シリコンブロックの品質判定プログラム、およびシリコン単結晶の製造方法 |
CN109524322B (zh) * | 2018-11-28 | 2020-11-17 | 上海超硅半导体有限公司 | 一种校正用硅片、其制备方法以及应用 |
CN115798558A (zh) * | 2022-12-22 | 2023-03-14 | 西安奕斯伟材料科技有限公司 | 晶圆评估方法、装置及可读存储介质 |
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- 2007-05-22 US US12/308,060 patent/US8173449B2/en active Active
- 2007-05-22 KR KR1020087030053A patent/KR20090016473A/ko active Application Filing
- 2007-05-22 WO PCT/JP2007/060425 patent/WO2007142024A1/ja active Application Filing
- 2007-05-22 DE DE112007001361.3T patent/DE112007001361B4/de active Active
- 2007-05-31 TW TW096119596A patent/TW200806969A/zh unknown
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Also Published As
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US8173449B2 (en) | 2012-05-08 |
KR20090016473A (ko) | 2009-02-13 |
KR20110043743A (ko) | 2011-04-27 |
KR101119721B1 (ko) | 2012-03-22 |
JP4640504B2 (ja) | 2011-03-02 |
US20090197358A1 (en) | 2009-08-06 |
CN101466876B (zh) | 2014-12-03 |
DE112007001361T5 (de) | 2009-04-16 |
TWI350912B (ja) | 2011-10-21 |
DE112007001361B4 (de) | 2019-06-06 |
JPWO2007142024A1 (ja) | 2009-10-22 |
CN101466876A (zh) | 2009-06-24 |
TW200806969A (en) | 2008-02-01 |
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