WO2011047008A1 - Procédé et appareil de commande d'épaisseur de feuille - Google Patents

Procédé et appareil de commande d'épaisseur de feuille Download PDF

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Publication number
WO2011047008A1
WO2011047008A1 PCT/US2010/052450 US2010052450W WO2011047008A1 WO 2011047008 A1 WO2011047008 A1 WO 2011047008A1 US 2010052450 W US2010052450 W US 2010052450W WO 2011047008 A1 WO2011047008 A1 WO 2011047008A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass ribbon
radiant
glass
heater
iii
Prior art date
Application number
PCT/US2010/052450
Other languages
English (en)
Inventor
Olus N. Boratav
Keith R. Gaylo
Steven M. Milillo
Original Assignee
Corning Incorporated
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Corning Incorporated filed Critical Corning Incorporated
Priority to JP2012534313A priority Critical patent/JP5698753B2/ja
Priority to CN201080045951.0A priority patent/CN102648164B/zh
Priority to KR1020127011889A priority patent/KR101835157B1/ko
Publication of WO2011047008A1 publication Critical patent/WO2011047008A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B18/00—Shaping glass in contact with the surface of a liquid
    • C03B18/02—Forming sheets
    • C03B18/04—Changing or regulating the dimensions of the molten glass ribbon
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C03B17/067—Forming glass sheets combined with thermal conditioning of the sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B18/00—Shaping glass in contact with the surface of a liquid
    • C03B18/02—Forming sheets
    • C03B18/20—Composition of the atmosphere above the float bath; Treating or purifying the atmosphere above the float bath
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the invention relates generally to methods and apparatus for forming a glass sheet. More specifically, the invention relates to a method and an apparatus for controlling the thickness of a glass sheet formed from molten glass.
  • U.S. Patent No. 3,682,609 describes a system for controlling thickness of a sheet formed from molten glass.
  • molten glass flows down opposite sides of a forming member and merges at a wedged root of the forming member to form a glass sheet.
  • the glass sheet passes between a pair of opposing housings having front walls that face the glass sheet.
  • the front walls are made of a material having high thermal conductivity, low expansion, and low emissivity, such as silicon carbide.
  • Fluid conduit tubes are arranged within the housings, with the nozzles of the fluid conduit tubes positioned in a spaced-apart relationship on the backside of the front walls.
  • Each fluid conduit has an associated flow meter, which is provided with a control valve and is connected to a manifold.
  • Each fluid conduit tube delivers cooling fluid or heated fluid to a backside area of the adjacent front wall. Typically, the delivered fluid is air.
  • Heat exchange via thermal radiation occurs between the glass sheet and the front walls in order to control the thickness of the glass sheet. If a thickness trace of the glass sheet indicates that a particular area across the width of the glass sheet is thicker than desired, the thickness trace is corrected by cooling zones of the glass sheet adjacent to the thicker area, i.e., cooling the thinner areas. Fluid conduit tubes corresponding to the adjacent zones are activated to cool the adjacent zones (i.e., the thinner areas).
  • the patent also suggests delivering heated fluid to the backside of the front walls as an alternative to delivering cooling fluid.
  • the heated fluid would be delivered by the fluid conduit tubes corresponding to the thicker area. This would decrease viscosity in the thicker area and then thin the area.
  • Heated fluid may be provided by electrical windings associated with the fluid conduit tubes.
  • the system described above has been used for many years to control the thickness of a sheet formed from molten glass. While the system is effective, there are some challenges with using the system.
  • the cooling fluid which is typically air
  • delivered by the fluid conduit tubes can sometimes leak into the draw where the glass sheet is located. Such leakage can result in uncontrolled thermal losses from the glass sheet and thickness discontinuities in the glass sheet.
  • the system is not easily adaptable to numerical controls and feedback systems, which are needed for automated control.
  • the resolution of the system's field of view is limited by the use of convective cooling of an intermediate wall that then diffuses the effect by thermal conduction. Attempts to create a shaped thermal signature are ineffective because of this diffusion.
  • a method of controlling a thickness profile of a glass ribbon comprises (A) for a selected strip of the glass ribbon exhibiting viscous behavior, finding one or more areas in the strip with a thickness that deviates from a target thickness for the strip; and (B) impinging radiant heat on the one or more areas of the strip to reduce viscosity of the glass in the one or more areas.
  • the method further comprises (C) repeating steps (A) and (B) for different strips of the glass ribbon exhibiting viscous behavior.
  • step (A) in step (A), the thickness of each of the one or more areas is greater than the target thickness, and in step (B) the thickness of each of the one or more areas is reduced.
  • step (B) comprises positioning a radiant heater adjacent to the strip and operating the radiant heater to impinge radiant heat upon the one or more areas.
  • step (B) the radiant heater comprises an array of radiant heating elements, and step (B) further comprises (D) overlapping fie lds-of- view of adjacent radiant heater elements in the array.
  • the radiant heating elements are linear and are slanted relative to a travel direction of the glass ribbon.
  • the radiant heater in step (B), has a non-linear shape to maximize radiation view factor between the radiant heater and the one or more areas.
  • the method further comprises (E) forming the glass ribbon by merging separate streams of molten glass at a wedged root of a forming member.
  • step (B) the radiant heater is positioned in the vicinity of the wedged root.
  • the radiant heaters are infrared heaters.
  • a system for controlling a thickness profile of a glass ribbon comprises a forming member for forming a glass ribbon, the forming member having a wedged root at which separate streams of molten glass merge to form the glass ribbon; and a radiant heater arranged to selectively impinge radiant heat on selected areas of the glass ribbon exhibiting viscous behavior and a thickness that deviates from a target thickness.
  • the radiant heater is positioned in the vicinity of the wedged root.
  • a method for making a glass sheet comprising the following steps is provided:
  • step (i) includes fusion forming the glass ribbon from a glass melt using an isopipe.
  • step 1 in step 1
  • the heater elements are arranged to have overlapping fields-of-view.
  • step 1 in step 1
  • the heater elements heat the ribbon differentially from one edge to the other across the width of the ribbon.
  • step (iii) includes:
  • step 1 in step 1
  • the heater elements apply more heat to an area of the ribbon within the width having the largest thickness than to an area having the smallest thickness.
  • step 1 in step 1
  • the heater array is essentially a linear array.
  • the array of heater elements in step (iii), can apply heat to the full width of the glass ribbon.
  • the heater elements apply heat by irradiation of an infrared beam.
  • step (i) includes forming the glass ribbon from a glass melt using an isopipe, and in step (iii), the heater elements are positioned in the vicinity of the root of the isopipe.
  • step (iii) the heater elements are positioned such that the heater elements apply heat to the glass ribbon before the glass ribbon reaches the root of the isopipe.
  • step (iii) an array of heater elements is positioned on each side of the isopipe, such that the two glass ribbons on the two sides of the isopipe are separately heated before joining at the root to form a single glass ribbon.
  • step (iii) an array of heater elements is positioned to apply heat to the glass ribbon below the root of the isopipe.
  • step (iii) an array of heater elements is positioned on each side of the isopipe to apply heat to each side of the glass ribbon below the root of the isopipe.
  • FIG. 1 is a schematic of a system for forming a glass ribbon with controlled thickness.
  • FIG. 2 is a side view of the system of FIG. 1.
  • FIG. 3 is a cross-section of the system of FIG. 2 along line 3-3.
  • FIG. 4 shows a radiant heater with an array of radiant heating elements.
  • FIG. 5 shows a radiant heater with an array of radiant heating elements arranged to eliminate dead zones and a controller for selectively operating the radiant heating elements.
  • FIG. 6 is a cross-section of the system of FIG. 5 illustrating overlapping radiant beams.
  • FIG. 7 shows radiant heating elements having non-linear shapes.
  • FIG. 1 illustrates a system and a process for forming a glass ribbon 113 with controlled thickness.
  • a downdraw forming member 101 of known construction such as shown in U.S. Patent Nos. 1,829,641 and 3,338,696, has converging sides 103, 105 terminating in a wedged root 107.
  • the glass ribbon 113 starts as two streams 109, 111 of molten glass flowing down the converging sides 103, 105 of the forming member 101 and merging at the wedged root 107 to form a glass sheet.
  • the streams 109, 111 of molten glass are formed by delivering molten glass 115 into a channel 117 in the forming member 101 and allowing the molten glass 115 to overflow the channel 117 in a known manner, such as described in U.S. Patent Nos. 1,829,641 and 3,338,696.
  • the glass ribbon 113 is drawn away in sheet-form from the wedged root 107. As the glass ribbon 113 is drawn away, the glass ribbon 113 cools down such that the glass transitions from the viscous regime to the elastic regime.
  • the cooling pattern of the glass ribbon 113 in the viscous regime affects the thickness profile of the glass ribbon 1 13 in the elastic regime.
  • Uneven cooling in the viscous regime may result in uncontrolled (e.g., non-uniform) thickness in the elastic regime.
  • the process of FIG. 1 uses reduction in heat loss from selected areas of the glass ribbon 113 to modify the cooling pattern of the glass ribbon 113 and control the thickness of the glass ribbon 1 13, as will be explained below.
  • a radiant heater 1 19 is provided adjacent to a surface 121 of the glass ribbon 113.
  • the radiant heater 119 impinges radiant heat, indicated by line 123, upon a selected area of the glass ribbon 113.
  • the criteria for selecting the area on which the radiant heat is impinged will be discussed below.
  • the radiant heat 123 moves with the glass ribbon 113 as the glass ribbon 113 is drawn away from the wedged root 107, as indicated by the cross-hatched area 125.
  • the imprint of the radiant heat on the glass ribbon 113 determines the width 127 of the heated area 125.
  • the spacing between the radiant heater 119 and the surface 121 and the geometry and output of the radiant heater 119 are appropriately selected to deliver a desired amount of radiant heat to the surface 121.
  • the radiant heater 119 is positioned where it can impinge radiant heat on the glass ribbon 113 above the wedged root 107.
  • the radiant heater 119 may be positioned where it can impinge radiant heat on the glass ribbon 113 below the wedged root 107 or at the wedged root 107.
  • the radiant heater 119 would be positioned where it can impinge radiant heat on an area of the glass ribbon 113 exhibiting viscous behavior.
  • the area of the glass ribbon 113 exhibiting viscous behavior would be in the vicinity of the wedged root 107.
  • a second radiant heater (not shown separately) may be provided on the opposite side of the glass ribbon 113 and used in the same manner as the first radiant heater 119 to impinge radiant heat on the glass ribbon 113.
  • FIG. 2 shows a side view of the system of FIG. 1.
  • a strip 201 is demarcated by dashed lines, and the radiant heater 119 is in opposing relation to the strip 201.
  • FIG. 3 shows a cross-section of the system of FIG. 2, taken along the strip 201.
  • there is a deviant area 301 having a thickness that deviates from the target or normal thickness for the strip 201.
  • the area 301 is considered as "deviant" because it has a thickness greater than the target or normal thickness for the strip.
  • the strip 201 may generally have one or more such deviant areas or no deviant areas.
  • the process of controlling the thickness of the glass ribbon 113 includes finding any deviant areas on the strip 201. Finding the deviant areas may involve active measurement on the strip 201 or may be based on historical data obtained using a particular set of process setup and parameters.
  • the radiant heater 119 is controlled to impinge radiant heat on the deviant areas.
  • the radiant heater 119 would impinge radiant heat on the deviant area 301, as indicated by the cross-hatched area 303.
  • the radiant heat delivered to the deviant area 301 would heat the area 301. This would decrease viscosity in the deviant area 301 and reduce the thickness of the deviant area 301.
  • the thickness reduction can be such that the thickness of the modified deviant area 301 now matches the target or normal thickness of the strip 201.
  • this heating would result in a modified temperature distribution across the strip 201, e.g., the modified temperature distribution could be more uniform than before the deviant area 301 was heated with the radiant heater 119.
  • This modified or more uniform temperature distribution would move with the strip 201 along the travel direction of the glass ribbon 113.
  • another strip of the glass ribbon 113 would be adjacent to the radiant heater 119.
  • the process described above for locating deviant areas and impinging radiant heat on the deviant areas may be repeated for this another strip and other future strips adjacent to the radiant heater 119.
  • the radiant heater 119 has to be stationary.
  • the radiant heater 119 may be re-positioned as necessary to heat-treat other portions of the glass ribbon 113 having deviant areas, provided that these deviant areas exhibit viscous behavior.
  • the radiant heater 1 19 generates electromagnetic radiation at a wavelength that is compatible with the absorption properties of the glass ribbon 1 13 so that the radiant heat can be absorbed by the glass to effect the reduction in viscosity.
  • the radiant heater 119 will be an infrared radiant heater.
  • the radiant heater 119 may include a single radiant heating element or an array of radiant heating elements.
  • the radiant heating elements may be made of refractory metals such as Pt, Pt alloy, tungsten, M0S1 2 , and the like, or ceramic materials such SiC.
  • the heating elements can take the shape of filament wires, e.g., tungsten wire, or emitter plates, e.g., ceramic plates.
  • a radiant heating element made of filament wire would include a wound loop of the wire to increase the surface area for generating radiant heat.
  • the radiant heating elements may be disposed in transparent enclosures, such as quartz enclosures.
  • the enclosures may be coated with reflective material to increase the amount of radiant heat delivered to the glass ribbon 113.
  • the radiant heater 119 may be an electrical radiant heater or an induction radiant heater.
  • the radiant heater 119 may or may not extend across the width (203 in FIG. 2) of the glass ribbon 113.
  • Multiple radiant heaters 119 may be provided across the width (203 in FIG. 2) of the glass ribbon 113 and operated to impinge radiant heat on multiple deviant areas.
  • FIG. 4 shows a radiant heater 1 19 including an array of radiant heating elements 401.
  • the radiant heating elements 401 are linear radiant heating elements. They are spaced apart and aligned with the travel direction of the glass ribbon 1 13, which is indicated by the arrow 403 (only the relevant portion of the glass ribbon 113 is shown in FIG. 4 for simplicity). Because of the spacing between the radiant heating elements 401 and alignment of the radiant heating elements 401 with the travel direction 403 of the glass ribbon 113, there are portions of the glass ribbon (corresponding to the gaps 404 between the radiant heating elements 401) that would not receive direct radiant heat.
  • the radiant heating elements 401 can be arranged such that their fields-of-view (or imprint of radiant heat on the glass ribbon 113) overlap.
  • FIG. 5 illustrates how this can be done.
  • four radiant heating elements 501, 503, 505, 507 are spaced-apart and slanted relative to the travel direction, indicated by arrow 508, of the glass ribbon 113 so that the radiant beam produced by one radiant heating element overlaps the radiant beam produced by an adjacent radiant heating element, e.g., the radiant beam produced by the radiant heating element 501 will overlap the radiant beam produced by the radiant heating element 503, and so on.
  • FIG. 6 illustrates overlapping radiant beams 601, 603, 605, 607,
  • the density of the cross-hatching of the radiant beams is used merely as a visual tool to distinguish one radiant beam from the next.
  • An array of radiant heating elements may be connected to a controller. This is illustrated in FIG. 5, where the radiant heating elements 501, 503, 505, 507 are connected to (or are in communication with) a controller 509.
  • the controller 509 may be operated to turn on or off the radiant heating elements 501, 503, 505, 507 individually.
  • the controller 509 may receive an external input, as shown at 511.
  • An example of an external input 511 may be the thickness or temperature profile across a strip of the glass ribbon 113.
  • the controller 509 may use the information to determine which of the radiant heating elements 501, 503, 505, 507 to turn on and which to turn off to achieve the target thickness or temperature distribution across the strip of the glass ribbon 113.
  • this may be an ongoing process, where the thickness or temperature profile is measured across the glass ribbon 113 at a particular location and the radiant heating elements 501, 503, 505, 507 are controlled to deliver heat to the desired strip of glass ribbon 113 based on the measured thickness or temperature profile.
  • An optical or thermal sensor may be used to measure the thickness or temperature profile, respectively. It is also possible to visually inspect the glass ribbon 1 13 and decide on which of the radiant heating elements 501, 503, 505, 507 to turn on or off. The information obtained via visual inspection may be used to operate the controller 509.
  • the radiant heater 119 described in FIG. 1 may include a single radiant heating element or an array of radiant heating elements. Multiple radiant heaters 119 may be used with the system, or a single radiant heater 119 having an array of radiant heating elements may be used with the system.
  • the radiant heater 119 may have a width spanning the width of the glass ribbon 113 or a width smaller than the width of the glass ribbon 1 13.
  • a controller may be used to individually control which of the radiant heating elements are operating at any time. The controller may also be used to adjust the output of the radiant heating elements.
  • the radiant heating elements are not limited to linear radiant heating elements as illustrated, for example, in FIGS. 4, 5, and 6.
  • Radiant heating elements having non-linear shapes may be used to maximize or increase radiation view factor.
  • Radiation view factor is the fraction of thermal energy leaving the surface of a first object and reaching the surface of a second object, determined entirely from geometric considerations.
  • FIG. 7 shows an elliptical radiant heating element 701 and an arbitrary radiant heating element 703.
  • Element 703 is an arbitrary shape and is intended to show how the present invention lends itself to creating a shape specifically to address the shape of the feature which requires a correction. For instance, an "L" shaped element could be positioned such that the vertical segment of the L could create a concentrated heating effect relative to the horizontal segment's wider, more diffused effect. The net result would be an asymmetrical effect on the glass.
  • the non-linear shape can be selected based on typical shapes of areas of the glass ribbon to be heated by the radiant heater.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Resistance Heating (AREA)

Abstract

L'invention concerne de manière générale des procédés et un appareil de fabrication d'une feuille de verre. Plus précisément, l'invention concerne un procédé et un appareil qui permettent de commander l'épaisseur d'une feuille de verre formée de verre fondu.
PCT/US2010/052450 2009-10-14 2010-10-13 Procédé et appareil de commande d'épaisseur de feuille WO2011047008A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2012534313A JP5698753B2 (ja) 2009-10-14 2010-10-13 シート厚さ制御方法および装置
CN201080045951.0A CN102648164B (zh) 2009-10-14 2010-10-13 用于控制平板厚度的方法和装置
KR1020127011889A KR101835157B1 (ko) 2009-10-14 2010-10-13 시트 두께 제어 방법 및 그 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25148109P 2009-10-14 2009-10-14
US61/251,481 2009-10-14

Publications (1)

Publication Number Publication Date
WO2011047008A1 true WO2011047008A1 (fr) 2011-04-21

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ID=43876497

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/052450 WO2011047008A1 (fr) 2009-10-14 2010-10-13 Procédé et appareil de commande d'épaisseur de feuille

Country Status (5)

Country Link
JP (1) JP5698753B2 (fr)
KR (1) KR101835157B1 (fr)
CN (1) CN102648164B (fr)
TW (1) TWI540106B (fr)
WO (1) WO2011047008A1 (fr)

Cited By (11)

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US20120293565A1 (en) * 2011-05-20 2012-11-22 Canon Kabushiki Kaisha Display apparatus and control method thereof
WO2014078262A1 (fr) * 2012-11-16 2014-05-22 Corning Incorporated Procédé de fabrication de rubans de verre continus
WO2015080879A1 (fr) * 2013-11-26 2015-06-04 Corning Incorporated Appareil de fabrication de verre et procédés de fabrication de ruban de verre
JP2015530958A (ja) * 2012-05-30 2015-10-29 コーニング インコーポレイテッド フレキシブルガラスリボンを検査する装置および方法
WO2016048815A1 (fr) * 2014-09-22 2016-03-31 Corning Incorporated Appareil et procédés de fabrication de verre
WO2016048817A1 (fr) * 2014-09-22 2016-03-31 Corning Incorporated Procédés de réglage de la prismaticité liée à l'épaisseur dans un ruban de verre
CN105705465A (zh) * 2014-04-30 2016-06-22 安瀚视特控股株式会社 玻璃板的制造方法及玻璃板的制造装置
WO2017053843A1 (fr) * 2015-09-24 2017-03-30 Corning Incorporated Procédés et appareil de fabrication de verre
WO2022026207A1 (fr) * 2020-07-29 2022-02-03 Corning Incorporated Appareil et procédé pour former du verre ayant un profil d'épaisseur amélioré
CN114401929A (zh) * 2019-09-13 2022-04-26 康宁股份有限公司 采用加热装置形成玻璃带的系统和方法
US11912605B2 (en) 2018-06-28 2024-02-27 Corning Incorporated Glass articles

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US8904822B2 (en) * 2012-11-06 2014-12-09 Corning Incorporated Thickness control of substrates
KR101811262B1 (ko) * 2013-06-27 2017-12-22 비트로, 에스.에이.비. 데 씨.브이. 저간섭성 광간섭법 조립체를 통합한 유리 제조 시스템
KR102216118B1 (ko) * 2013-11-25 2021-02-17 코닝 인코포레이티드 실질적인 원통형의 정반사성 반사 표면의 형상을 결정하는 방법
KR101755136B1 (ko) * 2014-02-21 2017-07-06 아반스트레이트 가부시키가이샤 유리판의 제조 방법 및 유리판의 제조 장치
JP6396142B2 (ja) * 2014-02-21 2018-09-26 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス板の製造方法及びガラス板の製造装置
CN105461193B (zh) * 2014-09-30 2018-11-23 安瀚视特控股株式会社 显示器用玻璃基板的制造方法
JP6498933B2 (ja) * 2014-12-29 2019-04-10 ＡｖａｎＳｔｒａｔｅ株式会社 ディスプレイ用ガラス基板の製造方法および製造装置
JP6638381B2 (ja) * 2015-12-22 2020-01-29 日本電気硝子株式会社 板ガラス製造装置及び板ガラス製造方法
DE102018111543A1 (de) * 2017-05-22 2018-11-22 Schott Ag Verfahren und Vorrichtung zur Dickenkontrolle eines Materialbands
JP6940991B2 (ja) * 2017-06-30 2021-09-29 ＡｖａｎＳｔｒａｔｅ株式会社 ガラスシートの製造方法
CN112088146A (zh) * 2018-03-06 2020-12-15 康宁公司 控制基板厚度的设备和方法

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KR20120086709A (ko) 2012-08-03
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JP5698753B2 (ja) 2015-04-08
KR101835157B1 (ko) 2018-03-06
TW201125827A (en) 2011-08-01

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