EP2897917A1 - Feuille de verre et dispositif comprenant ladite feuille de verre - Google Patents
Feuille de verre et dispositif comprenant ladite feuille de verreInfo
- Publication number
- EP2897917A1 EP2897917A1 EP13779272.7A EP13779272A EP2897917A1 EP 2897917 A1 EP2897917 A1 EP 2897917A1 EP 13779272 A EP13779272 A EP 13779272A EP 2897917 A1 EP2897917 A1 EP 2897917A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass sheet
- glass
- sheet according
- detection means
- electronic device
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
- G06F1/1643—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being associated to a digitizer, e.g. laptops that can be used as penpads
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/90—Other aspects of coatings
- C03C2217/94—Transparent conductive oxide layers [TCO] being part of a multilayer coating
- C03C2217/948—Layers comprising indium tin oxide [ITO]
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Definitions
- the invention relates to the field of thin glass sheets. It relates more particularly to thin glass sheets capable of withstanding violent shocks.
- Thin-glass sheets are frequently used as protective glass for various electronic devices, especially hand-held or portable, such as for example smart phones (sometimes called “smartphones”), personal digital assistants (sometimes called “PDAs”), tablets, digital cameras, media players, computers, television or display screens, etc.
- smart phones sometimes called “smartphones”
- PDAs personal digital assistants
- tablets digital cameras
- media players computers
- television or display screens etc.
- the glass sheets used in such devices are likely to be highly stressed from a mechanical point of view: repeated contact with hard and sharp objects, projectile impacts, falls ...
- Fragmentation is understood to mean the ability of the glass to break up by forming a multitude of small fragments (or even particles) that may be ejected, or if they remain in place to greatly reduce visibility through the sheet.
- the reinforcement provided by the presence of residual stresses after quenching is accompanied by tensions at heart, which will promote fragmentation.
- a growing number of devices including smart phones or tablets, incorporate touch-based features to detect a user's touch via a finger or a stylus to generate software control actions or manipulations. items displayed on the screen.
- a touch sensor there is generally disposed between the protective glass and the display screen a touch sensor, separated from the protective glass by an adhesive and comprising at least one substrate of glass or plastic (for example PET).
- the touch sensor is for example of the "projected capacitive" type implementing networks of thin conductive layers on one side or the other of at least one of the substrates.
- the chemical reinforcement of glass makes it difficult to integrate the two functions into one substrate.
- the deposition of the conductive layers can not be achieved prior to the chemical reinforcement, because the latter would deteriorate.
- the cutting and shaping of protective glasses must be performed before the chemical reinforcement because reinforced glasses can no longer be cut, except to reduce unacceptably the effects of reinforcement. Therefore, wanting to integrate the touch function with a protective glass would require the deposition of conductive layers on substrates of small size (after cutting), which is not economically viable.
- the object of the invention is to obviate these drawbacks by proposing glass sheets that can be used both as tactile sensors and as protective glasses, and thus capable of maintaining a high mechanical strength even after being heavily damaged during their use. while having a low fragmentation ability.
- the subject of the invention is an unreinforced glass sheet whose chemical composition is of the lithium aluminosilicate type and whose thickness is at most 2.0 mm.
- unreinforced is meant that the glass sheet is neither chemically reinforced nor thermally reinforced. It therefore does not normally have surface stresses greater than 50 MPa, in particular 10 MPa and even 1 MPa. Not being chemically enhanced, the leaf does not normally contain overconcentration an alkaline oxide such as Na or K at the surface with respect to the core of the sheet.
- the inventors have been able to demonstrate the fact that the glass sheets according to the invention surprisingly, thanks to their chemical composition, a resistance after severe damage (for example in case of shock) significantly improved, despite the absence of all mechanical reinforcement.
- An important consequence for the final product is the absence of fragmentation after rupture.
- Another consequence, important from the point of view of the process as that of the product, is that the glass sheet can be used as a protective glass and at the same time integrate the tactile function (being the support of the touch sensor), the deposition of the conductive layers can be achieved economically on large sheets, before cutting and forming the edges.
- the invention also relates to a protective glass for an electronic device obtained from a glass sheet according to the invention.
- the invention also relates to the use of the glass sheet according to the invention as a protective glass for an electronic device, in particular as a protective glass screen of said device.
- the thickness of the glass sheet is preferably at most 1.5 mm, or even 1.1 mm.
- the thickness of the glass sheet is preferably at least 0.05 mm, especially 0.25 mm and even 0.5 mm.
- At least one of its lateral dimensions, if necessary before or after deposition of tactile detection means, but before integration into the electronic device is advantageously at least 1 m, or even 2 m.
- the maximum dimension of the glass sheet is on the other hand and preferably at most 1 m, in particular 50 cm and even 30 cm.
- the lithium aluminosilicate glass is preferably such that its chemical composition comprises the following oxides in the ranges of weight contents defined below:
- the total weight content of alkaline oxides other than lithium oxide is advantageously at most 2% by weight, especially 1% by weight, and even 0.5% or still 0.1%.
- the weight content of CaO is preferably at most 1%, especially 0.5%, and even 0.1%, or even zero (excluding impurities unavoidable given the raw materials used and / or refractories).
- a preferred glass is such that its chemical composition comprises the following oxides in the ranges of weight contents defined below:
- MgO 0- R 9- in particular 0.55-1.5%
- the glass sheet according to the invention is advantageously provided on one of its faces with tactile detection means.
- tactile detection means may be in particular of the resistive, capacitive, optical or mechanical type.
- These means are preferably of the capacitive type, and in particular capacitive projected.
- the tactile detection means are preferably in the form of at least one optionally textured thin layer deposited on one side of the substrate.
- the tactile detection means preferably comprise at least one network of conductive tracks, in particular arranged in a plurality of rows and columns. The lines are generally arranged parallel to each other, as are the columns, and the rows and columns intersect at a given angle.
- the conductive tracks preferably consist of an electrically conductive transparent oxide (TCO), typically, and in a non-limiting manner, indium tin oxide (ITO) or zinc oxide and tin ( IZO).
- the tracks may in particular be obtained by deposition of layers (in particular by sputtering) followed by an etching step, for example by photolithography or by laser etching.
- the lines are advantageously separated from the columns by an electrically insulating thin separating layer.
- the invention also relates to an electronic device, in particular pocket or portable, such as including smart phone, personal digital assistant, digital camera, media player, computer, tablet, television, automatic ticketing, automated teller machine, automatic pay station, screen integrated in furniture, appliances or vehicle dashboards, comprising as protective glass at least one glass sheet according to the invention.
- Glass protection means the glass intended to protect the display screen against shocks.
- the protective glass is therefore in direct contact with the atmosphere and with the user.
- tactile detection means as defined above, these are arranged on the underside of the glass sheet, that is to say on the face of the glass sheet opposite to that which is in contact with the atmosphere and which is touched by the user's finger or a stylet. In this way, the user can not touch and degrade said means.
- the display screen is preferably chosen from liquid crystal displays (LCD) and organic light-emitting diode (OLED) screens, in particular active matrix displays.
- LCD liquid crystal displays
- OLED organic light-emitting diode
- the glass sheet may be formed by various otherwise known methods, such as the float process, wherein the molten glass is poured onto a bath of molten tin, the rolling between two rolls, the so-called “melting” process.
- draw in which the molten glass overflows a channel and comes to form a sheet by gravity, or the so-called “down-draw” process in which the molten glass flows downwards through a slot, before being stretched to the desired thickness and simultaneously cooled.
- a step of mechanical thinning (for example by polishing or grinding) can also be carried out after forming.
- the glass sheet is then optionally provided with tactile detection means.
- one side of the glass sheet according to the invention can be coated with at least one thin layer, possibly textured, and in particular two layers of ITO separated from an electrically insulating separating thin layer by sputtering, the ITO layers being each etched after their deposition by photolithography or laser etching to form the above-mentioned line and column array.
- the invention enables these steps to be performed on large substrates (at least one of which is at least 1 m or even 2 m in size), rather than substrates cut to the final size.
- the glass sheet may then be cut to give it its final dimensions, the cutting step being if necessary followed by a step of drilling holes, shaping or polishing the edges and / or the surface.
- the invention therefore also relates to a method of manufacturing a protective glass for an electronic device according to the invention comprising a step of forming the glass sheet, then a step in which said glass sheet, of which at least one dimension is at least 1 m, is provided with tactile detection means, and then a cutting step.
- the glass used for the example according to the invention is a lithium aluminosilicate having the following weight composition:
- C4 have different chemical weight compositions, reported in Table 1 below. These glasses (1 mm thick) are, as the case may be, soda-lime-silica glasses (example C1), sodium aluminosilicate glasses (examples C2 and C3) and borosilicates (example C4).
- the ring-to-tripode bending stress is measured after indentation under ambient conditions of temperature and humidity, as follows.
- 70 x 70 mm 2 test pieces are cut from a sheet of glass which has not undergone any treatment after its manufacture.
- Any face of each test piece is then coated with an adhesive film on one side which will subsequently be compressed.
- the role of this film is to allow the localization of the origin of rupture.
- the indentation is performed on the opposite side to the adhesive film with a Vickers diamond tip.
- the specimen is positioned under the tip so that the indentation is made in the middle of the test tube, to within 1 mm.
- the tip is then lowered onto the specimen and the indentation force maintained for 20 seconds.
- the glass is then stored for 24 hours to stabilize the propagation of cracks, while in other tests, the bending test is performed just after the indentation. In case of rupture after indentation but before the flexural test, the flexural breaking stress is declared null.
- the tripod ring bending test is carried out using an Instron 4400R machine, set with a traverse speed of 2 mm / min, instrumented with a 5 kN force sensor, a ring 10 mm diameter with a torus 1 mm in radius, fixed at the end of the Instron machine, and a base on which are glued 3 balls of radius 5 mm, arranged at 120 ° on a circle of 20 mm radius and whose center is coincident with the center of the ring.
- the test piece is placed between these 3 balls and the ring, so that the indentation mark is aligned with the center of the ring, within 1 mm.
- An increasing force is then applied to the ring until the test piece is broken. Only test specimens whose fracture origin is below the ring are counted.
- the breaking stress as a function of the breaking force and the thickness of the specimen is given by the following formula:
- Table 2 summarizes the results obtained by indicating for each sample the breaking stress for indent loads of 50, 100, 150 and 200 N, when the bending test is carried out just after indentation and 24 hours later. indentation. The results are an average of 5 samples. An asterisk indicates that at least one of the samples failed before the bending test.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Glass Compositions (AREA)
- Casings For Electric Apparatus (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Joining Of Glass To Other Materials (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1258866A FR2995887B1 (fr) | 2012-09-21 | 2012-09-21 | Feuille de verre et dispositif comprenant ladite feuille de verre |
| PCT/FR2013/052176 WO2014044985A1 (fr) | 2012-09-21 | 2013-09-20 | Feuille de verre et dispositif comprenant ladite feuille de verre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2897917A1 true EP2897917A1 (fr) | 2015-07-29 |
Family
ID=47557194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13779272.7A Withdrawn EP2897917A1 (fr) | 2012-09-21 | 2013-09-20 | Feuille de verre et dispositif comprenant ladite feuille de verre |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US10071930B2 (fr) |
| EP (1) | EP2897917A1 (fr) |
| JP (1) | JP6463682B2 (fr) |
| KR (1) | KR20150064029A (fr) |
| CN (1) | CN104640819A (fr) |
| AU (1) | AU2013320035B2 (fr) |
| BR (1) | BR112015005422A2 (fr) |
| CA (1) | CA2884810A1 (fr) |
| EA (1) | EA030352B1 (fr) |
| FR (1) | FR2995887B1 (fr) |
| MX (1) | MX2015003529A (fr) |
| MY (1) | MY182316A (fr) |
| WO (1) | WO2014044985A1 (fr) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9359251B2 (en) | 2012-02-29 | 2016-06-07 | Corning Incorporated | Ion exchanged glasses via non-error function compressive stress profiles |
| US11079309B2 (en) | 2013-07-26 | 2021-08-03 | Corning Incorporated | Strengthened glass articles having improved survivability |
| US9517968B2 (en) | 2014-02-24 | 2016-12-13 | Corning Incorporated | Strengthened glass with deep depth of compression |
| DE102014106817A1 (de) * | 2014-05-14 | 2015-11-19 | Schott Ag | Verfahren und Vorrichtung zur Herstellung eines Dünnglas-Bands und verfahrensgemäß hergestelltes Dünnglas-Band |
| TWI697403B (zh) | 2014-06-19 | 2020-07-01 | 美商康寧公司 | 無易碎應力分布曲線的玻璃 |
| CN108046589A (zh) | 2014-10-08 | 2018-05-18 | 康宁股份有限公司 | 包含金属氧化物浓度梯度的玻璃和玻璃陶瓷 |
| US10150698B2 (en) | 2014-10-31 | 2018-12-11 | Corning Incorporated | Strengthened glass with ultra deep depth of compression |
| WO2016073539A1 (fr) | 2014-11-04 | 2016-05-12 | Corning Incorporated | Profils de contraintes profondes non-fragiles et procédés de fabrication |
| US10579106B2 (en) | 2015-07-21 | 2020-03-03 | Corning Incorporated | Glass articles exhibiting improved fracture performance |
| US11613103B2 (en) | 2015-07-21 | 2023-03-28 | Corning Incorporated | Glass articles exhibiting improved fracture performance |
| TWI697463B (zh) | 2015-12-11 | 2020-07-01 | 美商康寧公司 | 具有金屬氧化物濃度梯度之可熔融成形的玻璃基物件 |
| CN105693085B (zh) * | 2015-12-30 | 2018-11-20 | 东旭科技集团有限公司 | 一种玻璃用组合物及其用途 |
| CN111423110A (zh) | 2016-04-08 | 2020-07-17 | 康宁股份有限公司 | 包含金属氧化物浓度梯度的玻璃基制品 |
| KR20200091500A (ko) | 2016-04-08 | 2020-07-30 | 코닝 인코포레이티드 | 두 영역을 포함하는 응력 프로파일을 포함하는 유리-계 물품, 및 제조 방법 |
| CN114063817A (zh) * | 2021-11-01 | 2022-02-18 | 隽美经纬电路有限公司 | 一种手动指纹触摸面板保护盖 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4413252A (en) * | 1980-01-23 | 1983-11-01 | Robertshaw Controls Company | Capacitive switch and panel |
| JP2004029723A (ja) * | 2002-05-09 | 2004-01-29 | Nippon Electric Glass Co Ltd | 共振器用スペーサ |
| JP2004131314A (ja) * | 2002-10-09 | 2004-04-30 | Asahi Glass Co Ltd | 透明導電膜付き化学強化ガラス基板、およびその製造方法 |
| JP2011141568A (ja) * | 2005-10-03 | 2011-07-21 | Nippon Electric Glass Co Ltd | 携帯機器表示装置用保護板 |
| WO2008050500A1 (fr) * | 2006-09-29 | 2008-05-02 | Nippon Electric Glass Co., Ltd. | Plaque protectrice pour dispositif d'affichage d'équipement portable |
| TWI486320B (zh) * | 2007-03-02 | 2015-06-01 | Nippon Electric Glass Co | 強化板玻璃及其製造方法 |
| CN101337770B (zh) * | 2008-08-18 | 2011-06-22 | 苏州新吴硝子科技有限公司 | 高强度铝硅酸盐玻璃及其化学钢化方法 |
| FR2948356B1 (fr) * | 2009-07-22 | 2011-08-19 | Saint Gobain | Dispositif electrochrome |
| JP5372697B2 (ja) * | 2009-10-21 | 2013-12-18 | 京セラディスプレイ株式会社 | 投影型静電容量タッチパネルの製造方法 |
| JP5483262B2 (ja) * | 2009-12-04 | 2014-05-07 | 日本電気硝子株式会社 | 合わせガラス |
| WO2012008586A1 (fr) * | 2010-07-15 | 2012-01-19 | 旭硝子株式会社 | Dispositif d'affichage à plasma |
| CN103250121B (zh) * | 2010-12-21 | 2014-09-17 | 日本写真印刷株式会社 | 覆盖玻璃一体型传感器 |
-
2012
- 2012-09-21 FR FR1258866A patent/FR2995887B1/fr not_active Expired - Fee Related
-
2013
- 2013-09-20 WO PCT/FR2013/052176 patent/WO2014044985A1/fr not_active Ceased
- 2013-09-20 BR BR112015005422A patent/BR112015005422A2/pt active Search and Examination
- 2013-09-20 US US14/430,056 patent/US10071930B2/en not_active Expired - Fee Related
- 2013-09-20 EP EP13779272.7A patent/EP2897917A1/fr not_active Withdrawn
- 2013-09-20 CN CN201380049054.0A patent/CN104640819A/zh active Pending
- 2013-09-20 EA EA201590609A patent/EA030352B1/ru not_active IP Right Cessation
- 2013-09-20 MX MX2015003529A patent/MX2015003529A/es unknown
- 2013-09-20 JP JP2015532485A patent/JP6463682B2/ja not_active Expired - Fee Related
- 2013-09-20 AU AU2013320035A patent/AU2013320035B2/en not_active Ceased
- 2013-09-20 CA CA2884810A patent/CA2884810A1/fr not_active Abandoned
- 2013-09-20 KR KR1020157006845A patent/KR20150064029A/ko not_active Ceased
- 2013-09-20 MY MYPI2015700885A patent/MY182316A/en unknown
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2014044985A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EA201590609A1 (ru) | 2015-07-30 |
| CN104640819A (zh) | 2015-05-20 |
| EA030352B1 (ru) | 2018-07-31 |
| FR2995887B1 (fr) | 2017-12-15 |
| JP6463682B2 (ja) | 2019-02-06 |
| US10071930B2 (en) | 2018-09-11 |
| AU2013320035A1 (en) | 2015-04-30 |
| JP2015530351A (ja) | 2015-10-15 |
| FR2995887A1 (fr) | 2014-03-28 |
| US20150251947A1 (en) | 2015-09-10 |
| KR20150064029A (ko) | 2015-06-10 |
| AU2013320035B2 (en) | 2017-04-13 |
| CA2884810A1 (fr) | 2014-03-27 |
| MX2015003529A (es) | 2015-07-14 |
| BR112015005422A2 (pt) | 2017-07-04 |
| EA201590609A8 (ru) | 2016-07-29 |
| WO2014044985A1 (fr) | 2014-03-27 |
| MY182316A (en) | 2021-01-19 |
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