WO2005105681A1 - ガラスの切断方法及びその装置 - Google Patents
ガラスの切断方法及びその装置 Download PDFInfo
- Publication number
- WO2005105681A1 WO2005105681A1 PCT/JP2005/007701 JP2005007701W WO2005105681A1 WO 2005105681 A1 WO2005105681 A1 WO 2005105681A1 JP 2005007701 W JP2005007701 W JP 2005007701W WO 2005105681 A1 WO2005105681 A1 WO 2005105681A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- laser
- scribe line
- pulse laser
- pulses
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/09—Severing cooled glass by thermal shock
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/09—Severing cooled glass by thermal shock
- C03B33/091—Severing cooled glass by thermal shock using at least one focussed radiation beam, e.g. laser beam
-
- 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
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/042—Automatically aligning the laser beam
-
- 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
- B23K26/36—Removing material
- B23K26/362—Laser etching
- B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
Definitions
- the present invention relates to a glass cutting method and apparatus, and more particularly to a glass cutting method and apparatus using pulsed laser light in the ultraviolet region.
- a scribe line (cut line) 62 is put on the surface of the glass 60 by using a blade 61 such as a diamond blade or an ultra-high blade, and then the back surface. It is known that a break force (impact breaking force) 63 is applied and the glass 60 is cut along the scribe line 62.
- a method of cutting glass using a laser is also known.
- a glass 60 is irradiated with an infrared laser 74 having a relatively high absorption shape after being shaped into an elliptical shape, and the vicinity of the rear side of the laser irradiation unit is a refrigerant.
- Cool with 75 aqueous coolant
- an initial crack is manually created in advance in a portion of the glass 60 to be cut, and the laser 74 is irradiated from that portion, and the vicinity of the rear side of the irradiated portion is cooled by a refrigerant 75 made of liquid (or gas). While scanning both on the glass 60.
- the initial crack propagates in the direction along which the initial crack is cut due to the thermal strain inside the glass 60, and a blind crack is generated in the depth direction, thereby forming a scribe line 72 (fence line).
- the glass 60 is cut by applying a breaking force 73 to the back surface force of the glass 60 and applying a bending moment to the blind crack.
- Patent Document 2 an ultraviolet laser having the highest photon energy is used instead of the infrared laser 74 shown in FIG. 12, and one ultraviolet laser is condensed by a lens, and the inside of the glass is
- This is a method of forming a scribe line without breaking an initial crack by directly breaking the molecular bond of the resin.
- the break uses an infrared laser that is not mechanically impacted.
- the glass body is sublimated by an ultraviolet laser and evaporated when the scribe line is formed. It is difficult to generate dust that becomes an obstacle in such subsequent processes.
- Patent Document 1 Japanese Patent Laid-Open No. 9-150286
- Patent Document 2 Japanese Patent Laid-Open No. 5-32428
- the present inventors have sought to improve the glass strength in the case of using this ultraviolet laser, and the cause of significantly reducing the glass strength is when the ultraviolet laser is irradiated while moving the glass in one direction in one stroke. , Remelted glass adheres to the scribe groove or It was found that the scribe groove was uneven due to the occurrence of a tooth-shaped crack.
- the present invention has been made to solve such a conventional technical problem, and the configuration thereof is as follows.
- the portion of the glass 4 to be cut is irradiated with the pulse laser 2 by a relative movement of one stroke to form the scribe line 7, and then the scribe line 7 is cut by applying a breaking force.
- a method of cutting glass wherein an ultraviolet region is used as the laser laser 2 and irradiation is performed while the pulse laser 2 is relatively moved so that the total number of pulses at each irradiation point is in the range of 2667 to 8000 pulses. Then, the scribe line 7 is formed to a depth in the range of 1.8 to 6.3% of the thickness of the glass 4.
- the scribe line 7 is formed at a depth of 1.8 to 6.3% of the thickness of the glass 4, the target glass strength: in order to secure 120MPa or more, the pulse laser 2 irradiation to the same part of the glass 4
- the total number of irradiation pulses was 8000 pulses at the maximum, and the total number of irradiation pulses was 2667 at the minimum.
- the invention according to claim 2 is the glass cutting method according to claim 1, wherein the pulse width of the pulse laser 2 is less than 100 picoseconds.
- the invention of claim 3 is characterized in that the pulse laser 2 is a third harmonic, a fourth harmonic or a fifth harmonic of an Nd: YAG laser, an Nd: YV04 laser or an Nd: YLF laser.
- the invention of claim 4 is that the repetition frequency force of the pulse laser 2 is 1 MHz or more.
- the portion of the glass 4 to be cut is irradiated with the pulse laser 2 by a relative movement of one stroke to form the scribe line 7, and then the scribe line 7 is cut by applying a breaking force.
- a laser oscillation device 1 that generates a pulse laser 2 in the ultraviolet region and a moving table 5 on which glass 4 is placed and moved are provided. While moving the moving table 5, the pulse laser 2 is pulsed at each irradiation point. Irradiating so that the total number is in the range of 2667 to 8000 pulses, the scribe line 7 is formed to a depth in the range of 1.8 to 6.3% of the thickness of the glass 4 A glass cutting device.
- a pulse laser having a suitable thermal energy in the ultraviolet region is irradiated many times to form a scribe line having a predetermined depth, and remelted glass adheres to the scribe groove, or the bottom surface is sawed. Occurrence of tooth-shaped cracks is well suppressed. Also, since the scribe line is formed by irradiating the pulse laser with a relative movement of one stroke, the scribe line can be formed quickly and accurately.
- the ultraviolet laser directly breaks the molecular bonds inside the glass where the photon energy is high, so that scribe lines can be efficiently formed without creating initial cracks.
- the glass bending strength after cleaving can be remarkably increased, and the problem of inadvertent breakage during normal use as liquid crystal panel glass, solar battery panel glass, etc. can be virtually eliminated.
- the glass bending strength can be improved from about 50 MPa to 150 MPa or more (about 3 times or more).
- FIG. 1 is a schematic diagram showing a cutting device used in a glass cutting method according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a cut portion of the glass.
- FIG. 3 is an explanatory view showing the overlapping state of pulse lasers.
- FIG. 4 Similarly, a diagram showing the moving table speed-the scribe depth and the ratio of the scribe depth to the glass thickness.
- FIG. 5 Diagram showing the moving table speed, number of irradiations, irradiation energy and irradiation energy density vs. glass bending strength.
- FIG. 6 A diagram schematically showing a micrograph near the scribe line of a cross section of the glass cut along the scribe line by forming a scribe line with a moving table speed of 80 mmZs and applying a break force.
- FIG. 7 A diagram schematically showing a micrograph of a glass cross section near a scribe line cut along a scribe line by forming a scribe line with a moving platform speed of 160 mmZs and applying a break force.
- FIG. 8 A diagram schematically showing a photomicrograph of the glass section near the scribe line cut along the scribe line by forming a scribe line with the moving table speed set to 240 mmZs.
- FIG. 9 is an explanatory diagram showing the frequency f, repetition period T, and pulse width ⁇ of the picosecond laser and nanosecond laser.
- FIG. 11 is a perspective view showing a conventional cutting method.
- FIG. 12 is a perspective view showing another conventional cutting method.
- the present invention uses an ultraviolet region as a pulse laser, and irradiates the pulse laser while relatively moving the pulse laser so that the total number of pulses at each irradiation point is in the range of 2667 to 8000 pulses. 1.
- An object of the present invention is to provide a glass cutting method and apparatus for forming a scribe line 7 at a depth of 8 to 6.3%.
- reference numeral 1 denotes a laser oscillation device, and this laser oscillation device 1 has a pulse width of 100 pico.
- a pulse laser 2 having a laser power in the ultraviolet region of less than a second (for example, ⁇ 15 ps as shown in FIG. 9B) is emitted.
- the pulse laser 2 in the ultraviolet region the third harmonic, fourth harmonic, or fifth harmonic of an Nd: YAG laser, an Nd: YV04 laser, or an Nd: YLF laser can be used.
- These short-wavelength ultraviolet region lasers are capable of photochemical degradation with a large photon energy. Is small and can be processed precisely and finely.
- the pulse laser 2 emitted from the laser oscillation device 1 changes the direction of 90 ° by the mirror 10, expands the beam diameter by the beam expander 11, and then stops by the condensing lens 3 to 1 of the flat glass 4 Irradiate the linear part of the side surface to be cut.
- the glass 4 is placed on the moving table 5, and the moving table 5 continuously moves relative to the pulse laser 2 at a predetermined speed in a predetermined direction (a direction perpendicular to the paper surface in FIG. 1).
- the moving table 5 on which the glass 4 is placed is driven by a driving device (not shown), and moves linearly with respect to the pulse laser 2 at a predetermined speed set in the X direction on FIG.
- the energy profile of the pulse laser 2 may be a flat line beam.
- This type of pulsed laser 2 can be formed by dividing and superimposing pulsed lasers, shaping a pulsed laser with a kaleidoscope, or shaping with a quinoform phase control plate.
- the pulse laser 2 that performs the pulse operation irradiates the glass 4 on the moving table 5 while moving the glass 4 in the scribe direction X by one stroke and appropriately overlaying it. That is, the relative movement speed in the scribe direction X is set so that the pulse laser 2 having a circular beam force shown in FIG. 3 is overlapped at a predetermined interval to have a predetermined number of times of overlap (number of irradiations). Therefore, the scribe line 7 formed by the irradiation of the pulse laser 2 is given a required depth by one movement of the moving table 5 on which the glass 4 is placed in the X direction.
- the pulse laser 2 can be shaped into a linear beam, an elliptical beam or the like instead of the circular beam.
- the longitudinal direction of the linear beam or elliptical beam is made to coincide with the scribe direction X.
- the relative movement speed in the scribe direction X is set so that the number of times of overlap is a predetermined number of overlaps.
- the energy per pulse (jZPulse) is a so-called nanosecond laser in the same ultraviolet region (Fig. 9 ( A) is extremely small (about 1Z1000 times), so that the pulse laser 2 at the irradiated spot effectively contributes to the transpiration of the glass 4, and the subsequent thermal diffusion to the glass 4 is small. Melting due to the heat effect of the glass 4 is suppressed.
- the range of the scribe depth to be applied to the glass 4 is examined.
- the scribe line 7 is too shallow, normal thickness glass cannot be cut well due to the action of the breaking force.
- the lower limit of the ratio of the thickness of the glass 4 to the thickness of the glass 4 is set to 1.8% as the breakable thickness.
- the upper limit of the ratio of the depth of the scribe line 7 to the thickness of the glass 4 is 6.3%. This is to avoid the cause of breakage, which will be described later, and to avoid unnecessary scribe work.
- an Nd: YAG laser is generated:
- An 8W laser oscillator 1 actually emits a pulsed laser 2 (wavelength: 355nm), and a glass 4 scribe line 7 After forming, a breaking force was applied, and the glass 4 was cut along the scribe line 7.
- mechanical impact force was used for the break, conventionally known means can be used as the break means in the break process, mechanical shock, cooling with a liquid or gas refrigerant, infrared laser irradiation The deviation can also be used.
- the pulse laser 2 When forming the scribe line 7, the pulse laser 2 was narrowed down to a diameter of 24 m by the condenser lens 3, and the one-side surface portion of the glass 4 was irradiated in a circular shape. As shown in FIG. 9B, the pulse laser 2 has a pulse width ⁇ : 15 ps, a repetition frequency f: 80 MHz, and a repetition period T: 12.5 ns. On the other hand, the glass 4 has a thickness of 630 m and has a depth ranging from 1.8% (about 11 m) to 6.3% (about 40 ⁇ m) with respect to the thickness of the glass 4. The scribe line 7 was formed. Since the apparatus shown in FIG. 1 does not give a breaking force, it is strictly a scribing apparatus in a glass cutting apparatus.
- the speed of the moving table 5 was 720mmZs as shown in FIG.
- the speed of the moving platform 5 was 240 mmZs as shown in FIG.
- the upper limit of the depth ratio of the scribe line 7 to the thickness of the glass 4 is 6.3% (moving table 5 speed: 240mmZs), as mentioned above, but also important to avoid unnecessary scribe work. As shown in Fig. 5, it is important to avoid a significant decrease in the bending strength of glass 4.
- the speed of the moving platform 5: 240 to 720 mmZs is changed so as to give the depth of the scribe line 7: 1. 8% to 6.3% by irradiation of one pulse of the pulse laser 2 as described above.
- the number of pulses of the pulse laser 2 irradiated to the same part of the glass 4 on the moving table 5 corresponding to these speeds: 240 to 720 mmZs was found to be 2667 to 8000 times as shown in FIG. It was in range.
- the irradiation energy corresponding to the total number of pulses of Norse laser 2 is 0.333-0.
- Irradiation energy The first is the energy irradiated per unit length of the scribe line 7, and when the scribe line 7 having a width corresponding to the beam diameter of the pulse laser 2 is formed, the beam diameter of the pulse laser 2 is large. Regardless of this, the value corresponds to the total number of pulses depending on the laser output value and the speed of the moving platform 5.
- the bending strength of the glass 4 after being cut by applying a breaking force is desirably 120 MPa or more in general use as a glass substrate such as liquid crystal panel glass and solar battery panel glass.
- a breaking force is desirably 120 MPa or more in general use as a glass substrate such as liquid crystal panel glass and solar battery panel glass.
- the number of irradiation pulses of the pulse laser 2 is set within the range of 2667 to 8000 times, cutting can be performed to 120 MPa or more.
- the total number of pulses irradiated to the same part of the pulse laser 2 is set to a maximum of 8000 pulses, and the number of irradiated pulses is set to enable a break.
- the minimum of 2667 pulses This is shown in Fig. 5 as an acceptable range.
- the same portion of the glass 4 is irradiated with the pulse laser 2 so that the number of pulses is 2667 to 8000 pulses, and the depth in the range of 1.8 to 6.3% of the thickness of the glass 4 (Fig.
- the scribe line 7 within the allowable range shown in Fig. 4
- remelted glass adheres in the groove of the scribe line 7, and sawtooth-shaped cracks Al, A2, Bl, B2, B3 are generated on the bottom surface.
- the uneven state of the unevenness is prevented well.
- the speed of the moving platform 5 is set to 280 mmZ s instead of 240 mmZs, a glass strength of about 220 MPa can be obtained, so that the glass bending strength can be improved by a factor of four or more compared to the conventional 50 MPa or less.
- the glass bending strength (MPa) after splitting was scribed with a so-called picosecond laser, as shown in FIG. 10, with a force V that can be obtained in the range of 45 to 25 OMPa. It is 40-50MPa.
- the total number of pulses when forming a scribe line at a depth of 1.8 to 6.3% of the same glass 4 thickness is About 3 to 12 pulses.
- the present invention is not limited to two-layer laminated glass, but can also be applied to two or more laminated glass.
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- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Laser Beam Processing (AREA)
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Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/559,816 US20070090100A1 (en) | 2004-04-27 | 2005-04-22 | Glass cutting method and apparatus therefor |
| DE112005000025T DE112005000025B4 (de) | 2004-04-27 | 2005-04-22 | Glasschneideverfahren |
| GB0524065A GB2417726B (en) | 2004-04-27 | 2005-04-22 | Glass cutting method and apparatus therefor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004131087A JP3908236B2 (ja) | 2004-04-27 | 2004-04-27 | ガラスの切断方法及びその装置 |
| JP2004-131087 | 2004-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005105681A1 true WO2005105681A1 (ja) | 2005-11-10 |
Family
ID=35241587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/007701 Ceased WO2005105681A1 (ja) | 2004-04-27 | 2005-04-22 | ガラスの切断方法及びその装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070090100A1 (ja) |
| JP (1) | JP3908236B2 (ja) |
| KR (1) | KR100675535B1 (ja) |
| DE (1) | DE112005000025B4 (ja) |
| GB (1) | GB2417726B (ja) |
| WO (1) | WO2005105681A1 (ja) |
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| JP2012527399A (ja) * | 2009-05-21 | 2012-11-08 | コーニング インコーポレイテッド | 機械的耐久性エッジを有する薄型基材 |
| CN107635935A (zh) * | 2015-05-15 | 2018-01-26 | 康宁股份有限公司 | 具有激光切割边缘的玻璃制品及其制造方法 |
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| JP2006259566A (ja) * | 2005-03-18 | 2006-09-28 | Hitachi Displays Ltd | 表示装置とその製造方法 |
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| KR20200145881A (ko) | 2019-06-19 | 2020-12-31 | 삼성디스플레이 주식회사 | 표시패널 및 이의 제조 방법 |
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| CN110860803A (zh) * | 2019-11-27 | 2020-03-06 | 中节能太阳能科技(镇江)有限公司 | 一种太阳能电池片低损切割方法及切割装置 |
| CN111302613A (zh) * | 2020-04-13 | 2020-06-19 | 武汉吉事达科技股份有限公司 | 一种皮秒激光切割超厚玻璃的方法 |
| CN115521056A (zh) * | 2022-10-25 | 2022-12-27 | 深圳市益铂晶科技有限公司 | 一种玻璃激光切割的劈裂方法 |
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| US6016324A (en) * | 1994-08-24 | 2000-01-18 | Jmar Research, Inc. | Short pulse laser system |
| JPH09150286A (ja) * | 1995-06-26 | 1997-06-10 | Corning Inc | 脆弱性材料切断方法および装置 |
| JP4041298B2 (ja) * | 2001-10-05 | 2008-01-30 | 日本板硝子株式会社 | レーザ光照射によるガラスの加工方法 |
-
2004
- 2004-04-27 JP JP2004131087A patent/JP3908236B2/ja not_active Expired - Fee Related
-
2005
- 2005-04-22 KR KR1020057025098A patent/KR100675535B1/ko not_active Expired - Fee Related
- 2005-04-22 WO PCT/JP2005/007701 patent/WO2005105681A1/ja not_active Ceased
- 2005-04-22 DE DE112005000025T patent/DE112005000025B4/de not_active Expired - Fee Related
- 2005-04-22 GB GB0524065A patent/GB2417726B/en not_active Expired - Fee Related
- 2005-04-22 US US10/559,816 patent/US20070090100A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0532428A (ja) * | 1991-07-30 | 1993-02-09 | Hoya Corp | ガラス加工方法及びその装置 |
| JP2004174579A (ja) * | 2002-11-28 | 2004-06-24 | Matsushita Electric Ind Co Ltd | レーザパターニング方法 |
| JP2005179154A (ja) * | 2003-12-22 | 2005-07-07 | Shibuya Kogyo Co Ltd | 脆性材料の割断方法およびその装置 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012527399A (ja) * | 2009-05-21 | 2012-11-08 | コーニング インコーポレイテッド | 機械的耐久性エッジを有する薄型基材 |
| US9422188B2 (en) | 2009-05-21 | 2016-08-23 | Corning Incorporated | Thin substrates having mechanically durable edges |
| CN107635935A (zh) * | 2015-05-15 | 2018-01-26 | 康宁股份有限公司 | 具有激光切割边缘的玻璃制品及其制造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0524065D0 (en) | 2006-01-04 |
| KR100675535B1 (ko) | 2007-01-30 |
| JP3908236B2 (ja) | 2007-04-25 |
| KR20060030057A (ko) | 2006-04-07 |
| US20070090100A1 (en) | 2007-04-26 |
| GB2417726A (en) | 2006-03-08 |
| DE112005000025B4 (de) | 2008-01-03 |
| DE112005000025T5 (de) | 2007-02-08 |
| JP2005314127A (ja) | 2005-11-10 |
| GB2417726B (en) | 2009-01-28 |
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