CN101987433A - Method for manufacuturing glass plate for display window - Google Patents

Method for manufacuturing glass plate for display window Download PDF

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Publication number
CN101987433A
CN101987433A CN2010101498853A CN201010149885A CN101987433A CN 101987433 A CN101987433 A CN 101987433A CN 2010101498853 A CN2010101498853 A CN 2010101498853A CN 201010149885 A CN201010149885 A CN 201010149885A CN 101987433 A CN101987433 A CN 101987433A
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CN
China
Prior art keywords
glass
flexible glue
glue band
adhesive tape
glass plate
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.)
Pending
Application number
CN2010101498853A
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Chinese (zh)
Inventor
李得雨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WIN OF RODEM TECHNOLOGY Co Ltd
Original Assignee
WIN OF RODEM TECHNOLOGY Co Ltd
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 WIN OF RODEM TECHNOLOGY Co Ltd filed Critical WIN OF RODEM TECHNOLOGY Co Ltd
Publication of CN101987433A publication Critical patent/CN101987433A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/10—Glass-cutting tools, e.g. scoring tools
    • 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

Abstract

The present invention discloses a method for manufacturing glass for display window, which is commonly used for a portable terminal, such as a mobile communication terminal, a personal digital assistant (PDA) and a portable multimedia player (PMP). The disclosed method comprises the following steps: preparing raw plate glass, adhibiting flexible adhesive tape on at least one surface in two surfaces of raw plate glass for matching with the shape of glass plate for display window, removing the glass part except for the part which is adhibited with the flexible adhesive tape through spraying polishing agent on the surface of raw plate glass that is adhibited with flexible adhesive tape whereon, and stripping the flexible adhesive tape from an intermediate for obtaining the glass plate.

Description

Make the method for display window glass plate
CROSS-REFERENCE TO RELATED APPLICATIONS
The application requires the priority of the korean patent application submitted on July 30th, 2009 10-2009-0070012 number, and its full content is hereby expressly incorporated by reference.
Technical field
The present invention relates to a kind of method of making the display window glass plate, this display window glass plate is generally used for portable terminal, as mobile communication terminal, PDA(Personal Digital Assistant), portable media player (PMP) etc.
Background technology
Recently, it is more universal that mobile communication terminal becomes, and the demand of mobile communication terminal is constantly increased.At present, such mobile communication terminal often has the display window of being made by the glass plate as thin as a wafer of good thermal resistance, rather than by the display window of making such as the synthetic material of acrylic resin.
The following describes the conventional method of making the display window glass plate.
At first, the original plate glass of cutting is complementary with the shape with the expectation of the display window that will make, and the outer surface of the glass plate after the cutting is ground and form the hole in glass plate.After handled product is ground, product is carried out annealing in process and polishing.Then, the product after the polishing is cleaned and checks defective.
In aforementioned manufacture method, should cut the outer surface of plate glass with the peripheral edge surplus (edge margin) that is enough to cutting plate glass.Therefore, the peripheral edge surplus in order to ensure enough may expend too many plate glass.And because need carry out other processing to the product that obtains after the suitable cutting forming outer surface and hole wherein, so said method may be with following problem: unnecessarily prolonged process time, and the hole processes and may cause product defects.Need hand lapping by cutting from the glass outer surface that original plate glass cuts, and this has caused the reduction of productivity ratio.In addition, because polishing carries out twice usually, Given this, original plate glass should have enough thickness.As a result, increased production cost and prolonged process time.
Summary of the invention
The present invention is intended to solve the problems referred to above that relate to conventional art, the object of the present invention is to provide a kind of method of making the display window glass plate, it is characterized in that, can realize being used for the clean glassware (clean glass article) of display window with the process time, the economically feasible cost that reduce and the fault rate that can significantly reduce goods.
Description of drawings
Accompanying drawing is comprised being used to provide further understanding of the present invention, and is incorporated into this and constitutes the application's a part.Exemplary embodiment of the present invention all is used for explaining principle of the present invention together with describing.In the accompanying drawings:
Fig. 1 is the flow chart that illustrates according to the method for the manufacturing display window glass plate of exemplary embodiment of the present invention;
Fig. 2 A～Fig. 2 J is the diagrammatic sketch that the method for making the display window glass plate according to an embodiment of the invention is shown;
Fig. 3 A～Fig. 3 C shows the exemplary shape by the final display window glass plate of making of the present invention; And
Fig. 4 A～Fig. 4 C shows the diagrammatic sketch by the cutting part of the original glass plate 60 that obtains to its jet paraffin oxidation thing powder.
The specific embodiment
Other advantages of the present invention, purpose and a feature part will be set forth hereinafter, and the part experiment by hereinafter for the ordinary skill in the art will become apparent or can be obtained from the practice of the present invention.Pass through the structure that particularly points out in the specification write and claim and the accompanying drawing, can understand and know these purposes of the present invention and other advantages.
In order to realize these purposes and other advantages and according to purpose of the present invention, such as in this article embodiment and general description, a kind of method of making the display window glass plate, this method comprises: prepare original plate glass; Paste the flexible glue band that (taping) has the display window glass sheet shape at least one surface in two surfaces of original plate glass; By being pasted with jet polishing agent on the original surface of plate glass of flexible glue band, remove the remainder outside the part that is pasted with the flexible glue band; And the flexible glue band peeled off to finish glass plate from intermediate (intermediate).
Below, in conjunction with the accompanying drawings, reference example embodiment describes the method for making the display window glass plate in detail.
Fig. 1 shows the flow chart according to the method for the manufacturing display window glass plate of exemplary embodiment of the present invention, comprising: prepare original plate glass (step 10); On original plate glass, paste the shape (step 12～18) of flexible glue band with the glass plate of coupling display window; Polishing agent is ejected on the surface of original plate glass (step 20～32); And grind and/or annealing in process (step 34～42).
Fig. 2 A～Fig. 2 J shows the method for making glass plate according to an embodiment of the invention as shown in Figure 1.
Below with reference to Fig. 2 A～Fig. 2 J explanation method of making glass plate according to an embodiment of the invention as shown in Figure 1.
According to the inventive method of making glass plate, the original plate glass 60 (step 10) shown in the set-up dirgram 2A.In step 10, plate glass 60 is checked to determine on it whether cut (scar), crackle (crack) and/or impurity being arranged.After checking, select and be ready to original plate glass 60.Ready plate glass 60 has upper surface and the lower surface (US and LS) that is defined in wherein.According to the kind of customer requirements and/or display window, the plate glass 60 of all kinds and size can be proposed.
After step 10,, first adhesive tape is adhered to the top (step 12～18) of the US or the LS of plate glass 60 based on the shape of final glassware.In this case, used adhesive tape comprises the flexible glue band, and wherein glass adheres to a side of adhesive tape, preferably, at this side application of adhesive of adhesive tape so that use the constant force stripping tape.
In order more to be expressly understood the present invention, be present on the top of each US and LS if suppose first adhesive tape, then the aforementioned processing from step 12～step 18 will become apparent from the following description, but the present invention is not particularly limited in this.
Fig. 3 A～Fig. 3 C shows the exemplary embodiment of the shape of final display window glassware.
The shape of the glassware of display window depends on user's request.For example, as shown in Figure 3A, glassware is a main window.Similarly, glassware can be the regular terminal type main window shown in Fig. 3 B, or the irregular terminal type main window shown in Fig. 3 C.
After step 10, definition is corresponding to image layout (layout of an the image) (step 12) of the glassware shape of display window.For example, use CAD to determine to have the image of the display window glassware of intended shape.
After step 12, shown in Fig. 2 B, adhesive tape 70 and 72 is pasted the whole LS and the US (step 14) of plate glass 60 respectively.
After step 14, shown in Fig. 2 C, on adhesive tape 70 and 72, form the image of definition in the step 12 by making marks.More specifically, with the image transfer of definition in the step 12 to US and LS (90) so that can be respectively marking image on the US 80 and on LS another image (not shown) of mark.In this case, the image (not shown) of the other mark on the image 80 of the mark on the US and the LS is mutually symmetrical on vertical direction.Image on image that forms on the LS and US is basic identical.
Though provide the explanation of the image of the regular terminal type main window of supposition shown in Fig. 3 B below, the present invention can be used for the image of general main window and/or irregular main window form.Here, the image 80 of regular terminal type main window form has hole 82.
After step 16, the remainder (step 18) outside stripping tape 70 and 72 the image tagged part 80.Briefly, shown in Fig. 2 D, first 70A of adhesive tape portion with image tagged part 80 is retained on the US, and another the first adhesive tape 72A of portion with image tagged part (not shown) is retained on the LS.When partly peel adhesion was in 60 two lip-deep adhesive tapes 70 of plate glass and 72, preferably, the interior section in hole 82 also was stripped from and is removed.
After step 18, the US of the plate glass 60 that adhered to the first adhesive tape 70A with display window glassware shape and 72A and at least one among the LS are carried out milled processed, by to its jet polishing agent to remove the glass part outside the part of having pasted the first adhesive tape 70A with display window glassware shape and 72A, that is the part of the removed plate glass 60 of adhesive tape (step 20～32).
With reference to figure 2E～Fig. 2 I, step 20～32 according to exemplary embodiment of the present invention will be described after a while.
After step 18, shown in Fig. 2 E, second adhesive tape 100 is adhered on the whole LS, have the LS last (step 20) that sticks on plate glass 60 with the first adhesive tape 72A of the last corresponding shape of image that forms of LS simultaneously.
After step 20, shown in Fig. 2 F, jet polishing agent 110 (step 22) on the US that does not paste second adhesive tape 100 of plate glass 60.Therefore, removed the part of not pasting the plate glass 60 of the first adhesive tape 70A with display window glassware shape.As a result, shown in Fig. 2 F, formed and had the glass plate 60A identical shaped with the shape of the first adhesive tape 70A.Here, also removed the glass part 60 of 82 inside, hole that are pasted with the first adhesive tape 70A.
In this, when by in jet polishing agent 110 on the US when plate glass 60 is removed the part of not pasting the first adhesive tape 70A, second adhesive tape 100 is adhered to injection thereon to be had on the US facing surfaces (being LS) of polishing agent, separated from one another to prevent the first adhesive tape 70A and glass plate 60A.
Yet the present invention is not limited to the explanation of front especially.For example, before pasting second adhesive tape 100 on the LS, perhaps need not on LS, to paste second adhesive tape 100, can jet polishing agent on US.
According to the present invention, polishing agent 110 used herein can be an oxide powder, and it comprises aluminium oxide Al 2O 3, and optional Fe 2O 3, Na 2O and SiO 2In at least a.Here oxide powder comprises Al 2O 3, Fe 2O 3And Na 2O, its composition can be represented by following relation than (compositionalratio):
[relational expression 1]
Al 2O 3∶Fe 2O 3∶Na 2O＝992～997∶0.5～1.5∶2～4
According to the present invention, Al 2O 3: Fe 2O 3: Na 2The composition ratio of O is preferably 99.5: 0.1: 0.3.
According to exemplary embodiment of the present invention, can be by air pressure or hydraulic pressure jet polishing agent 110.The level of air pressure or hydraulic pressure depends on the type of plate glass 60.
Air pressure or hydraulic pressure with expectation are ejected into aforementioned polishing agent 110 on the plate glass, with bump plate glass 60, the part of removing the plate glass 60 that does not cover the first adhesive tape 70A.
After step 22, after being ejected into polishing agent 110 on the US, using the washing of washer or washer (not shown) or clean the product (step 24) that obtains.
After step 24, shown in Fig. 2 G, the 3rd adhesive tape 102 is further adhered to the US top.And, shown in Fig. 2 H, peel off second adhesive tape 100 (step 26) that in step 20, adheres on the LS.Can use laminator (laminator) (not shown) to adhere to second adhesive tape 100 and the 3rd adhesive tape 102.
After step 26, shown in Fig. 2 H, polishing agent 130 is injected in the LS that does not paste second adhesive tape 100 goes up (step 28).As a result, removed the glass portion that does not cover the first adhesive tape 72A that on LS, forms in the step 18.In this case, when by polishing agent 130 is ejected on the LS, when LS removed the part of not pasting the first adhesive tape 72A, the 3rd adhesive tape 102 adhered to spraying thereon to be had on the LS facing surfaces (being US) of polishing agent 130, separated from one another to prevent the first adhesive tape 72A and glass plate 60A.Yet the present invention is not limited to the explanation of front especially.For example, before the 3rd adhesive tape 102 is pasted the US top, perhaps need not to paste the 3rd adhesive tape 102, polishing agent 130 can be ejected on the LS at the US top.
The polishing agent 110 that uses in the formation component of polishing agent 130 and expulsion pressure and the step 22 is basic identical, has omitted its detailed description for the sake of brevity.
Fig. 4 A～Fig. 4 C shows the diagrammatic sketch of the cutting part of the original glass plate 60 that obtains by jet paraffin oxidation thing powder 110.Particularly, Fig. 4 A is the enlarged drawing of the rounded portions 120 shown in Fig. 2 F, and it only is illustrated in direction I and goes up observed glass portion 62A and 64A.On the other hand, Fig. 4 B is the enlarged drawing of the rounded portions 122 shown in Fig. 2 H, and it only is illustrated in observed glass portion 62B of direction I and 64B.
Shown in Fig. 2 F, in the time of on polishing agent 110 being ejected into US, the edge part 62A and the 64A that cut from plate glass 60 are downward-sloping.Next, by polishing agent 130 is ejected on the LS, edge part 62A and 64A tilt on bottom direction and upper direction shown in Fig. 4 A.As a result, each the cut edge 62B and the 64B of plate glass have formed C shape 200.
After step 28, after being ejected into polishing agent 130 on the LS, clean the product (step 30) that obtains.
After step 30, peel adhesion obtains the product (step 32) shown in Fig. 2 J to the 3rd adhesive tape 102 of US.
According to the present invention, when peel adhesion during to second adhesive tape 100 at the first adhesive tape 70A and 72A top and the 3rd adhesive tape 102, according to the adhesion (adhesion) and/or the type of definite the second and the 3rd adhesive tape (100 and 102) of expectation, to prevent from any afterimage (after-image) is retained in the top of the first adhesive tape 70A and 72A.In addition, the value that each the thickness among the first adhesive tape 70A and the 72A can be defined as expecting is to be enough to protect the surperficial 60A or the 60B of each glass when polishing agent 110 or 130 being ejected on the first adhesive tape 70A and the 72A.When with the first adhesive tape 70A and/or 72A when glass component 60B peels off, in order to prevent that any afterimage is retained on the glass portion 60B, can determine type and/or the adhesion of the first adhesive tape 70A and/or 72A according to expectation.
And, according to previous embodiment of the present invention, use the second and the 3rd adhesive tape 100 and 102, and jet polishing agent 110 and 130.Yet the present invention is not limited to previous embodiment especially.That is, can jet polishing agent 110 and 130 and need not the second and the 3rd adhesive tape 100 and 102 is pasted on the plate glass 60.
After step 32, to by jet polishing agent 110 and 130 on plate glass, clean and peel off the 3rd adhesive tape 102 and (step 34) ground in the cut edge of the product that the product that obtains obtains from US.More specifically, glass portion 62B shown in Fig. 4 B and 64B are being carried out the place of grinding, shown in Fig. 4 C, the angle of bend of cutting part reduces.In other words, C shape 200 becomes slick and sly.Except four edges of glass product, in step 34, also hole 82A is ground.
After step 34, shown in Fig. 2 J, the first adhesive tape 70A and 72A are peeled off (step 36) from glass 60B.
After step 36, shown in Fig. 2 J, after peeling off the first adhesive tape 70A and 72B, clean the product 60C (step 38) that obtains.
After step 38, peeling off the first adhesive tape 70A and 72A and then after the cleaning products, the product that obtains is being carried out annealing in process (step 40) by heat treatment.
Compare with the processing shown in Fig. 1, annealing in process can comprise in accordance with another embodiment of the present invention, before adhesive tape 70 and 72 is pasted the US and LS of plate glass 60 respectively, for example before step 14, plate glass 60 is annealed.
After step 40, the product after the annealing is carried out ultrasonic cleaning (step 42).
After step 42, can further check the final glass plate that has been formed with desired images thereon, determining on glass plate, whether having spot, cut and/or crackle, and the size of definite glass plate, intensity and/or brittleness.
It is evident that from top explanation, the inventive method of making the display window glass plate comprises, paste plate glass with first adhesive tape that has with the corresponding shape of image of display window glassware, to be ejected into such as the polishing agent of oxide powder then and paste the on glass of adhesive tape, so that with glass-cutting is the shape of first adhesive tape, this traditional handicraft with cutting plate glass is different.Therefore, in the process of making the display window glassware, the utilization of plate glass is maximized, and does not need the peripheral surplus of big plate glass.And, need the classical production process of long process time to compare with peripheral surface with the hole for the glass plate of handling in addition cutting, method of the present invention has adopted polishing agent, polishing machine is ejected on the outer surface of not pasting first adhesive tape and the hole on, and then remove the outer surface and the hole of not pasting first adhesive tape simultaneously, therefore, preferably, shorten process time, and reduced the hazard rate that causes by complex process and process time well.
In aforementioned grinding and annealing in process, do not need further polishing, thereby can further shorten process time, also can prevent the deterioration of the strength of glass that causes by other polishing.
And though the ordinary plate glass that is polished needs thick relatively thickness, the present invention does not need such polishing, therefore, can use and compare the original plate glass with thin thickness with the typical thickness of ordinary plate glass.Therefore, preferably, reduced product cost.
As polishing agent, the present invention has used oxide powder.Owing to oxide powder is injected on the plate glass so that it is cut, therefore can makes display window glass plate effectively according to user's needs with precise thickness.
Though technical construction of the present invention and other features have been described, it will be apparent to those skilled in the art that, the invention is not restricted to exemplary embodiment and above-mentioned accompanying drawing, do not deviate from interior replacement, variation and/or the improvement of scope of the present invention that claim limits but can be encompassed in.

Claims (14)

1. method of making the display window glass plate, described method comprises:
Prepare original plate glass;
On at least one surface in two surfaces of described original plate glass, paste the shape of flexible glue band with coupling display window glass plate;
By polishing agent being ejected on the surface of the described original plate glass of having pasted described flexible glue band thereon, removing the part of the part glass in addition of having pasted described flexible glue band; And
Described flexible glue band is peeled off to finish described glass plate from intermediate.
2. method according to claim 1 wherein, forms described adhesive tape by carrying out following steps:
On two surfaces of described original plate glass, paste the first flexible glue band and the second flexible glue band;
The shape of a plurality of described glass plates of mark on the described first flexible glue band and the second flexible glue band; And
Peel off the described first flexible glue band except the part that is marked with described glass sheet shape and the part of the second flexible glue band.
3. method according to claim 1, wherein, described polishing agent comprises oxide powder.
4. method according to claim 3, wherein, described oxide powder comprises aluminium oxide Al 2O 3
5. method according to claim 4, wherein, described oxide powder further comprises Fe 2O 3, Na 2O and SiO 2In at least a.
6. method according to claim 5, wherein, described aluminium oxide Al 2O 3, Fe 2O 3And Na 2The composition ratio of O is 992～997: 0.5～1.5: 2～4, wherein, adopt aluminium oxide Al 2O 3, Fe 2O 3And Na 2The mixture of O is as described oxide powder.
7. method according to claim 1 wherein, is sprayed described polishing agent by air pressure.
8. method according to claim 1 wherein, is sprayed described polishing agent by hydraulic pressure.
9. method according to claim 1 further comprises:
Before being peeled off from described intermediate, cleans by described flexible glue band described intermediate.
10. method according to claim 1 further comprises:
Before described flexible glue band was peeled off from described intermediate, the sharp edge that grinds described intermediate was to reduce the angle of bend at described sharp edge.
11. method according to claim 1 further comprises:
Clean the glass plate of finishing that described flexible glue band is peeled off from it.
12. method according to claim 1 further comprises:
The glass plate of finishing that described flexible glue band is peeled off is from it annealed; And
Clean the described glass plate of annealing.
13. method according to claim 1 further comprises:
Before pasting described flexible glue band, the original plate glass of preparing is annealed.
14. method according to claim 1, wherein, the shape of described glass plate comprises in traditional main window, regular terminal type main window and the irregular terminal type main window.
CN2010101498853A 2009-07-30 2010-04-16 Method for manufacuturing glass plate for display window Pending CN101987433A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090070012A KR101089346B1 (en) 2009-07-30 2009-07-30 Method for manufacuturing glass for display window
KR10-2009-0070012 2009-07-30

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CN101987433A true CN101987433A (en) 2011-03-23

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101963444B1 (en) * 2018-03-12 2019-03-28 주식회사 프로코텍 Sheet glass manufacture method for camera module

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5955413A (en) * 1982-09-25 1984-03-30 Sharp Corp Manufacture of glass substrate for display device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511717A (en) 1978-07-03 1980-01-26 Akira Samejima Processing method for surface pattern by sandblast
JPS5992926A (en) 1982-11-19 1984-05-29 Ishizuka Glass Ltd Method for making hole in glass bottle
JPS6188219A (en) 1984-10-08 1986-05-06 Sharp Corp Production of liquid crystal display element

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5955413A (en) * 1982-09-25 1984-03-30 Sharp Corp Manufacture of glass substrate for display device

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KR20110012329A (en) 2011-02-09

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Application publication date: 20110323