TWI302210B - - Google Patents

Description

1302210 IX. Description of the Invention: [Technical Field] The present invention relates to a substrate, and more particularly to a substrate for a liquid crystal display (LCD). The invention further relates to a method of making the substrate. [Prior Art] Flat panel display devices such as liquid day and day display, piasma display anel (eld; Electroluminescent Display) and vacuum light emission for miniaturization and reduction of power consumption Display (VFD; Vacuum Fluorescent Display). In these flat panel display devices, due to the good quality and low power consumption, the development activities of the liquid crystal display are still the most lingering despite the many disadvantages. Although portable TVs and notebook computers that have been introduced to the market already have LCD monitors, they still have different problems to be solved. Since televisions and computers have become portable electronic devices, the reduction in size and weight is one of the objectives of the development of liquid crystal displays. There are many different ways to reduce the size and weight of the liquid crystal display, but it is difficult to reduce the number of main components of the liquid crystal display. In addition, the main components are quite small, making it difficult to further reduce their size and weight. Fortunately, the glass of one of the most basic components of a liquid crystal display can still reduce the weight. In particular, the weight reduction of the glass substrate is important for the second generation because it constitutes a large part of the total weight of the liquid crystal display. In order to reduce the weight of the glass substrate, the substrate must be thinned. however,

P01-082-TW 5 Ι3Ό2210 The processing of the glass substrate is technically very difficult because it is easily damaged after being processed into a thin glass. The surface becomes rough after an improper processing operation. In conventional techniques, the method most commonly used to reduce the weight of the glass substrate is to etch the surface of the glass substrate by immersing the substrate in a container containing the remaining immersion agent. However, in this method, the substrate is often etched unevenly because of the non-uniform surface of the substrate surface. In addition, impurities generated during the etching process of the rice immersion will adhere to the surface of the substrate, so that the surface becomes rougher, and the etching etchant is a highly corrosive dangerous liquid, which is not only operationally dangerous, but also used. Post-recycling and processing is also a major problem. In addition, conventional techniques use transparent glass as a substrate for manufacturing liquid crystal displays. Since the conventional glass is relatively thick, it is not affected by physical impact or heat during the process. To reduce the weight of the liquid crystal display, a single substrate of 6 mm has been used. However, if a thin glass sheet having a thickness of less than a millimeter is used at the beginning, the manufacturing yield will be lowered due to damage or deformation of the glass sheet. For the manufacture of the lower plate and the liquid crystal injection process, the step of heating or cooling between 200 degrees and 300 degrees occurs more than ten times. In addition, the high speed rotation step from the rinsing or coating process needs to be repeated several times. Therefore, the above reasons limit the thickness of the glass in the process to be too thin. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a substrate for a liquid crystal display that overcomes or at least ameliorates the problems of the prior art described above. Another object of the present invention is to provide a method of manufacturing a sheet for a liquid crystal display that overcomes or at least ameliorates the problems of the aforementioned prior art. earth

P01-082-TW 6 1302210 Another object of the present month is to provide a liquid crystal display unit (Lei) cell manufacturing method which can overcome or at least ameliorate the problems of the prior art described above. To achieve the above object, the present invention provides a The substrate of the liquid crystal display mainly comprises two opposed glass sheets, wherein the two glass sheets preferably have the same material and the same thickness, for example, about 0. 3 mm to about 0. 45 mm. According to a first preferred embodiment of the present invention, the edges of the two glass sheets are welded such that there is substantially no space between the two glass sheets. A substrate manufacturing method according to a third preferred embodiment of the present invention comprises: (a) providing two opposed glass sheets = (b) placing the two glass sheets in a vacuum chamber (vacuum chambe〇 such that the two glass sheets are attached to each other And (c) welding the edges of the two glass sheets to form the substrate. The step (c) is preferably achieved by laser welding. According to a second preferred embodiment of the present invention, the two glass sheets each have a chamfer provided at an edge thereof, and the concave portions jointly defined by the chamfers of the two glass sheets are provided with an adhesive for sealing the two glass sheets. Together, there is substantially no space between the two sheets of glass. Preferably, the adhesive is resistant to acids and bases and to at least 350. Further, the chamfer angle of the glass sheet is preferably from about 30° to about 80. The substrate manufacturing method according to the second preferred embodiment of the present invention is a package 3 (a) providing two glass sheets; (b) chamfering the edges of the two glass sheets (c) opposing the two glass sheets such that the chamfers together define a recess; (d) placing the two glass sheets in a vacuum chamber such that the two glass sheets Attached to each other; (e) filled with an adhesive in the recess; and (f) cured the adhesive.

P01-082-TW 7 1302210 The entrance and exit of the night show that the above-mentioned substrate containing two pairs of glazed sheets is used for further processing... It is worth noting that in the entire system: package, the thickness of the substrate of the two opposite glass sheets is designed to be sufficient for physical shock or thermal influence. After the process is completed, the substrate/BOM will be removed, thereby greatly reducing the thickness of the resulting liquid crystal display 70 without sacrificing yield. According to a preferred embodiment of the present invention, a liquid crystal display unit manufacturing method has the following steps: (a) providing an upper substrate and a lower substrate, each of which comprises two opposite first glass sheets and a second glass sheet, (4) The edge of the glass sheet is spliced such that there is substantially no space between the two opposing glass sheets; (b) forming a transparent electrode and at least one color filter on the first glass sheet of the upper substrate; (c) forming At least one scan line (eg, grab line), data line (data une), thin film transistor, and pixel electrode on the first glass sheet of the lower substrate; (d) combining the upper substrate and the lower substrate; and (e) cutting the The glass sheets of the upper substrate and the lower substrate are welded to each other such that the second glass sheet is separated from the first glass sheet. A method of fabricating a liquid crystal display unit according to another preferred embodiment of the present invention comprises the steps of: (a) providing an upper substrate and a lower substrate each comprising two opposite first glass sheets and a second glass sheet, The two glass sheets each have a chamfer provided at an edge thereof, and the chamfers of the two glass sheets collectively define a concave portion, and an adhesive is disposed on the concave portion for sealing the two opposite glass sheets together so that the two opposite glass sheets are There is substantially no space therebetween; (b) forming a transparent electrode and at least one color filter on the first glass piece of the upper substrate; (c) forming at least one scan line (scarl 1 ine), data line (data)

P01-082-TW 8 1302210 line), a thin film transistor and a pixel electrode on the first glass sheet of the lower substrate; (d) combining the upper substrate and the lower substrate; and (6) cutting the glass of the upper substrate and the lower substrate The chamfered edge of the sheet is used to remove the adhesive. Thereby the second glass sheet is separated from the first glass sheet. [Embodiment] The first figure shows a substrate 200 for a liquid crystal display according to a first preferred embodiment of the present invention. The substrate 2 (10) mainly comprises two opposite glass sheets 210, 22G. Preferably, the thickness of the two glass sheets 21, 22 () is less than about 0.7 mm, more preferably from about 3 mm to about 45 mm. Optimally, the two glass sheets 210, 22() have the same material f and the same thickness 'such that the two glass sheets 21G, 22G will have a uniform expansion or contraction amount with temperature change, thereby greatly reducing the occurrence of Thermal stress between the two glass sheets 21〇, 220. The edges of the two glass sheets 21〇, 22〇 are melted such that there is substantially no space between the two glass sheets, thereby preventing foreign matter such as strong acid or strong entry between the two glass sheets 21〇, 22〇. . The method of manufacturing the substrate 200 will be described in detail below. First, the two glass sheets 210 220 are opposed to each other. The two glass sheets are then placed in a vacuum chamber such that the two glass sheets are attached to each other. Finally, the glass sheets 210 and 220 are connected to each other, and a, the edges are densely connected by laser welding. In detail, the two opposite glass sheets 210, 220 are welded together by a laser beam along the edge. It is understandable that the lightning used for welding must be able to be absorbed by the glass and its energy must be sufficient to raise the temperature of the edge of the glass to its melting point. And f are shown for liquid crystal according to the second preferred embodiment of the present invention.

P01-082-TW 9 1302210 Substrate 300 for display. The substrate mainly comprises two opposite glass sheets 310, 320. Preferably, the thickness of the two glass sheets 31, 32 is less than about 0.7 mm, more preferably from about 3 mm to about 0.45 mm: optimally the two glass sheets 31 〇, 32〇 have the same material and the same thickness. The two glass sheets 31, 320 have a chamfer provided at the edge thereof, and the two glass 431, 32 〇 < the chamfer commonly defined recess is provided with an adhesive 330 for the two glass sheets 31 The 〇, 32 〇 are sealed together such that there is substantially no space between the two sheets of glass. Preferably, the adhesive is resistant to acid and to a high temperature of at least 35 (TC), thereby preventing foreign matter such as strong acid or strong alkali from entering between the two glass sheets 310, 320. The manufacturing method of the substrate 300 is detailed First, the edges of the glass sheets are chamfered, thereby producing chamfered glass sheets 310, 32G as shown in the second figure. In detail, it is cut into individual glass sheets and directly pressed. In a rotating grinding disc, wherein the chamfering angle (angle θ as shown) is preferably about 3 〇 to about 80°. Next, the two glass sheets 310, The 32 〇 are opposed to each other such that their chamfers collectively define a recess, and then the two glass sheets 31 〇, 32 〇 are placed in a vacuum chamber such that the two glass sheets 31 〇, 32 贴 are attached to each other. Finally, an adhesive is filled in the recess and the adhesive is cured, thereby sealing the two glass sheets 310, 320 together such that there is substantially no space between the two glass sheets. The present invention further utilizes the foregoing two pairs The substrate 2 or the substrate 300 on which the glass piece is placed Manufacturing a liquid crystal display unit (LCD cell). It is worth noting that the total thickness of the substrate comprising two opposing glass sheets (preferably at least 0 · 7 mm) is designed to withstand the physics of the process throughout the process. Punch P01-082-TW 10 1302210 impact or heat effect. After the granulation element is formed, the substrate 200 or the substrate 3 .. One of the two glass sheets will be removed, thereby greatly reducing the liquid crystal produced. The thickness of the display unit without sacrificing the yield. The fourth to sixth figures disclose a method of fabricating a liquid crystal display unit using the substrate of the present invention. First, a transparent electrode is formed by the same method as the conventional process technology. (as a common electrode) and at least one colored tear film on the glass piece 210 of a substrate 200. Then, a plurality of scanning lines (scan iine) and a plurality of data lines (data) are formed by the same method as the conventional process technology. Line), a plurality of thin film transistors, and a plurality of pixel electrodes on the glass sheet 210 of the other substrate 200. In detail, the plurality of scanning lines are parallel to each other and perpendicular to the complex Strip data lines, although not shown in the figure, are insulated from each other by an inner insulating layer. The area around which two adjacent scanning lines and two adjacent data lines are wound is defined as one pixel ( a pixel region, and in each pixel region, a thin film transistor (TFT) is provided as a switching element and a pixel electrode. When the scanning signal is input to the scanning line, the thin film transistor will be turned on. The video signal (vide〇signal) is sent to the pixel electrode via itself. It can be understood that the upper substrate is a so-called color filter substrate (CF substrate) because the color filter is provided thereon, and the lower substrate 420 is a so-called TFT substrate. The upper substrate 410 and the lower substrate 42 are bonded together with a sealing material. In detail, the assembly process of the upper substrate 41〇 and the lower substrate 42〇 includes the steps described later; first, the adhesive material 43〇 is printed by screen printing (silksereening) or screen printing technology, and is left.

P01-082-TW 11 1302210 A hole for later injection of liquid crystal. After the frame is printed, it is cured to remove the solvent from the material and partially crosslink the polymer; this will make the adhesive material less B-stage and allow the board to collide when aligned touch. Prior to joining the two glass substrates, it is generally desirable to place spacers 44 on one of the substrates to maintain a precise cell spacing (typically 5-10 microns). Finally, the two glass substrates are aligned and heated and pressed to complete the complete crosslinking of the finished polymer. After the assembly of the upper substrate 410 and the lower substrate 420 is completed, the upper substrate 41A and the glass substrate fusion edge of the lower substrate 42 are cut out by laser cutting (see FIG. 5), so that the glass sheet 22 is The glass piece 210 is separated. Port u Finally, the composition shown in the fifth figure is cut into individual liquid crystal display units (LCD cells) whose size depends on the desired size. Then perform chamfering and appearance inspection. It is worth noting that the final completed liquid crystal display unit has only two glass sheets 21, and the glass sheets 22 are removed, thereby greatly reducing the thickness of the liquid crystal display unit produced. Referring to the sixth drawing, the liquid crystal material 44 is implanted into the chamber between the upper substrate 41 and the lower substrate 420. Next, the polarizer is attached to the outside of the substrate, and a driving circuit board (not shown) is attached thereto. Finally, a backlight unit (not shown) is mounted to complete the liquid crystal display module (LCD module). The seventh to ninth drawings disclose a method of manufacturing a liquid crystal display unit using the substrate 300 of the present invention. Α Α m t first] using a method similar to the conventional process technology to form a transparent electrode f 彳 & u h Λ , (as a common electrode) and at least one color filter

P01-082-TW 1302210 The light sheet 2 is on the glass piece 310 of the substrate 300. Then, a plurality of scanning lines (sun ^), a plurality of data lines, a plurality of thin film transistors, and a plurality of pixel electrodes are formed on the glass piece 310 of the other substrate 300 by the same method as the conventional process technology. . It can be understood that the upper substrate 510 is a so-called color filter substrate (CF substrate) because a color filter is provided thereon, and the lower substrate 520 is a so-called thin film transistor substrate (TFT substrate). Then, the upper substrate 5 10 and the lower substrate 52 are bonded together with a sealing material. After the assembly of the two glass substrates is completed, the chamfered edges of the upper substrate 510 and the lower substrate 520 are cut by laser cutting to remove the adhesive 330 (see FIG. 8), so that the glass sheet 31 is removed. The crucible is separated from the glass sheet 320. Finally, the composition shown in the eighth figure is cut into individual liquid crystal display units (LCD cells) whose size depends on the desired size. Then perform chamfering and appearance inspection. It is worth noting that the final completed liquid crystal display unit has only two glass sheets 32 〇, and the glass sheets 31 are removed, thereby greatly reducing the thickness of the liquid crystal display unit produced. Referring to the ninth drawing, the liquid crystal material 440 is injected into a narrow space between the upper substrate 5 10 and the lower substrate 520. Next, a p〇larizing film 45 贴 was attached to the outside of the substrate, and a driving circuit board (not shown) was attached thereto. Finally, a backlight unit (not shown) is mounted to complete the liquid crystal display module (LCD module). The invention is characterized in that in the process of the entire color filter substrate and the film f crystal substrate, the thickness of the substrate including the two opposite glass sheets is P01-082-TW 13 1302210, which is designed as a foot-and-light substrate and ^ Physical impact or thermal impact! In color: glass, %, 曰曰, after the substrate combination is completed, the thickness of the two units of the substrate? (4) The error is that the liquid crystal display film B gg produced by the liquid crystal display is drastically reduced without sacrificing the yield. Although the present invention is directed to a substrate for thin film and a beta film, the present invention can be applied to a wide variety of devices as long as it contains a substrate similar to that used for a display. While the present invention has been described in its preferred embodiments, it is not intended to limit the scope of the invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention is defined by the scope of the appended claims. P01-082-TW 14 1302210

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent < 1 is a cross-sectional view of a substrate for a liquid crystal display according to a first preferred embodiment of the present invention; FIG. 2 is a cross-sectional view of two chamfered glass sheets; FIG. 3 is a second preferred embodiment of the present invention. FIG. 4 to FIG. 6 are diagrams for explaining a method of manufacturing a liquid crystal display unit using the substrate shown in FIG. 1; and FIGS. 7 to 9: It is a method for explaining the manufacturing method of the liquid crystal display unit using the substrate shown in FIG. [Main component symbol description] 200 substrate 210 glass plate 220 glass plate 300 substrate 310 glass plate 320 glass plate 330 adhesive 410 upper substrate 420 lower substrate 430 adhesive material 440 spacer 450 liquid crystal material 460 polarizer 510 upper substrate 520 lower substrate P01-082-TW 15 1302210 θ angle

P01-082-TW 16

Claims (1)

1302210 于, application for patent scope: 1, - seed liquid € display unit system Zuo Danba 兮 the following steps: Provide an upper substrate and a Meigu ^ soil reverse, each containing two pairs of the first glass and the first Two glass sheets, the two, which are different from each other, have 30 to 80. The chamfer is disposed at an edge thereof, and the chamfers of the two glass sheets together define a concave portion, and an adhesive is disposed on the concave portion for sealing the two opposite glass sheets so that the two opposite glass sheets are There is substantially no space therebetween; forming a transparent electrode and at least one color filter on the first glass piece of the upper substrate; forming at least one scan line, data line 1), thin film transistor and pixel electrode On the first glass sheet of the lower substrate; combining the upper substrate and the lower substrate; and cutting the chamfered edges of the glass sheets of the upper substrate and the lower substrate to remove the adhesive, thereby making the second glass sheet and the first The glass piece is separated. 2. The method of manufacturing a liquid crystal display unit according to item 1 of the patent application scope' The removal step is achieved by laser ertting. 3. The method of manufacturing a liquid crystal display unit according to the first aspect of the patent application, wherein the composition for cutting the upper substrate and the lower substrate is a plurality of liquid crystal display units. 4. The liquid crystal display unit manufacturing method according to claim 1, wherein the first glass piece has a thickness of 0.3 mm to 〇45 mm. 5. The method of manufacturing a liquid crystal display unit according to claim 4, wherein the first glass piece and the second glass piece have the same material and the same thickness. 6. According to the manufacturer of the liquid crystal display unit of claim 1, wherein the adhesive is resistant to acid and alkali and resistant to at least 35 (the high temperature of rc. The liquid crystal display unit manufacturing method comprises the following steps: providing an upper a substrate and a lower substrate each comprising two opposite first glass sheets and a second glass sheet, the edges of the two glass sheets being welded together such that there is substantially no space between the two opposing glass sheets; forming a transparent electrode And at least one color filter on the first glass piece of the upper substrate; forming at least one scan line, a data line, a thin film transistor, and a pixel electrode on the first glass piece of the lower substrate; Combining the upper substrate and the lower substrate; and cutting the glass sheet welding edge of the upper substrate and the lower substrate to separate the second glass sheet from the first glass sheet. 8. The method for manufacturing the liquid crystal display unit according to claim 7 The removal step is achieved by laser cutting. 9. The liquid crystal display unit according to item 7 of the patent application scope The manufacturing method, the P01-082-TW 18 1302210: comprising a composition for cutting the upper substrate and the lower substrate into a plurality of liquid crystal display units. The liquid crystal display unit manufacturing method according to claim 7 of the patent scope, wherein the first The thickness of the 13⁄4 p slab is 〇·3 mm to 〇, 45 mm. The manufacturer of the liquid crystal display unit according to item 10 of the Shenshen patent scope: 3⁄4, in which the female Yu i, Y Tongdi, a glass piece and The second glass piece has the same material and the same thickness. A substrate manufacturing method for a liquid crystal display, comprising: providing two glass sheets; _ &quot; the edges of the two glass sheets are chamfered, and the range is between Between 30 and 80. The two glass sheets are opposed such that the chamfers jointly define one portion; the two glass sheets are placed in a vacuum chamber such that the two glass sheets are attached to each other; and an adhesive is filled in the concave portion And curing the adhesive. 13. The substrate manufacturing method for the liquid crystal display according to the scope of the patent application of the invention, wherein the thickness of the two glass sheets is 0.3 mm to 0.45 mm. Special The method for manufacturing a substrate for a liquid crystal display according to Item 13, wherein the two glass sheets have the same material and thickness. P01-082-TW 19 1302210 15. Substrate manufacturing for liquid crystal display according to claim 12 The method wherein the adhesive is resistant to acid and alkali and to a high temperature of at least 350° C. 16. A method for manufacturing a substrate for a liquid crystal display, comprising: providing two opposed glass sheets; The two glass sheets are placed in a vacuum chamber such that the two glass sheets are attached to each other; and the edges of the two glass sheets are melted to form the substrate. 1#7. A substrate manufacturing method for a liquid crystal display according to claim 16 of the patent application, wherein the melting step is achieved by laser welding. 18. A method of fabricating a substrate for a liquid crystal display according to the scope of claim 1 wherein the thickness of one of the two glass sheets is less than 0.7 mm. 19. A method of fabricating a substrate for a liquid crystal display according to claim 18, wherein one of the two glass sheets has a thickness of from 0.3 mm to 0.45 mm. 20. The method of manufacturing a substrate for a liquid crystal display according to claim 19, wherein the two glass sheets have the same material and the same thickness. A substrate for a liquid crystal display, which comprises two opposed glass sheets, each of which has a 30. To 80. The chamfer is disposed at an edge thereof, and the chamfers of the two glass sheets together define a recess, and an adhesive is disposed on the recess to seal the two opposing glass sheets together. The substrate for a liquid crystal display according to claim 2, wherein the thickness of one of the two glass sheets is less than 〇7 mm. 23. A substrate for a liquid crystal display according to claim 22, wherein one of the two glass sheets has a thickness of from 公3 mm to 〇45 mm. 24. The substrate for a liquid crystal display according to claim 23, wherein the two glass sheets have the same material and thickness. 25. A substrate for a liquid crystal display according to claim 21, wherein the adhesive is resistant to acid and alkali and to a high temperature of at least 35 〇 °C. 26. A substrate for a liquid crystal display, comprising two opposed glass sheets, wherein one of the two glass sheets has a thickness of less than 0.7 mm, and the edges of the two glass sheets are in a vacuum environment. The lower portions are tightly joined by laser welding so that there is substantially no space between the two glass sheets. 27. A substrate for a liquid crystal display according to claim 26, wherein one of the two glass sheets has a thickness of less than 0.7 mm. 28. A substrate for a liquid crystal display according to claim 27, wherein one of the two glass sheets has a thickness of from 0.3 mm to 0.45 mm. 29. A substrate for a liquid crystal display according to claim 28, wherein the two glass sheets have the same material and the same thickness. P01-082-TW 21