JPH11119204A - Substrate with color filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the management of the number of sheets in physical distribution management and inspection stage of substrates by enabling the recognition of the substrates regardless of the states of the substrates no matter the substrates are mother substrates or cut substrates. SOLUTION: Color filters are formed by providing the surface of the transparent substrate with black matrixes and arraying plural rows of respective colored layers consisting of three primary colors thereon. At the time of forming the black matrices or the respective colored layers on the substrate, a photosensitive paste or nonphotosensitive paste and a photosensitive resist are superposed in a lamination state on the substrate and thereafter the formation of recognition information is executed as well at the time of patterning the laminate to prescribed patterns. The recognition information is used for the execution of system management for the process history of the substrates and assortment at the time of shipping and packing. The information which may be recognized by the recognition information include the kinds of the color filters, IDs, such as date of production, series, surface numbers and serial numbers, the material quality of the substrates, front and rear, up and down, etc., and may be properly selected or may be used in combination according to the purposes of use of the recognition information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a substrate with a color filter for an LCD.

[0002]

2. Description of the Related Art In a process for manufacturing a color filter for LCD, a photosensitive resin is coated in a laminated state on a positive or negative photosensitive resin colored with a pigment or the like on a substrate or a colored non-photosensitive resin. However, a manufacturing method of forming a desired pattern by a photolithography method is mainly used. However, the manufacturing method using the photolithography method has a problem that the number of steps is large and the manufacturing cost is very high.

A mother substrate used for a color filter is:
Initially, a substrate of about 300 × 400 mm was used, but it was possible to manufacture two pieces of 10 inch class color filters from this mother substrate. afterwards,
The size of the mother substrate was enlarged to about 360 × 465 mm, and it became possible to manufacture four pieces of 10 inch-class color filters. As a result, the manufacturing cost was reduced. However, as the size of the color filters has been increased, color filters of 12 inch class or more have become the mainstream of manufacturing. With a substrate of 360 × 465 mm class, only two pieces of a 12-inch class color filter can be manufactured, so that the mother substrate was further enlarged.

[0004]

However, the enlargement of the mother substrate has caused the following problems.

[0005] Until a substrate of 360 × 465 mm class, it was possible to integrally bond the array substrate and the mother substrate of the color filter. However, since it is impossible to integrally bond a larger substrate, it is necessary to cut the mother substrate to a predetermined size.

The process of manufacturing a color filter is very complicated and involves many steps. For this reason, it is necessary to perform single-wafer management of the board in the board physical distribution management and the inspection process. 360 × 465mm
Since the substrates up to the first class were integrally attached, it was possible to manage single substrates by arranging at least one piece of identification information on the mother substrate.

[0007] However, for substrates of 550 x 650 mm or more, it is necessary to cut the mother substrate to a predetermined size due to strict integration, but the conventional technique cannot perform single-wafer management of cut substrates.

[0008] The present invention ameliorates the disadvantages of the prior art,
It is an object of the present invention to provide a substrate with a color filter capable of managing a single wafer irrespective of the state of the substrate.

[0009]

In order to achieve the above object, the present invention employs the following constitution. That is, (1) a substrate before cutting a substrate with a color filter into a predetermined size is called a mother substrate, and when one or a plurality of substrates obtained by cutting the mother substrate into a predetermined size is called a cut substrate, A substrate with a color filter, wherein the substrate and the cut substrate each include at least one or more pieces of recognition information capable of recognizing the type and ID of the substrate.

(2) Recognizing the relative position between the recognition information used for the mother board to recognize the type and ID of the mother board and the board reference of the mother board, and the type and ID of the cut board. The substrate with a color filter according to (1), wherein the relative position between the recognition information used for the cut substrate and the substrate reference of the cut substrate is different.

(3) On the mother board, the identification information used for recognizing the type and ID of the board on the mother board, and the identification information when the mother board is cut into the cut board. The color according to (1) or (2), wherein the recognition information used for recognizing the type and ID of the substrate is arranged asymmetrically with respect to the center of the mother substrate. Substrate with filter.

(4) The recognition information used for recognizing the type and ID of the mother board is arranged outside the cut board.
The substrate with a color filter according to (2) or (3).

(5) The color according to any one of (1) to (4), wherein the number of the pieces of recognition information existing on the mother board is equal to or larger than the number of the cut boards. Substrate with filter.

(6) The color filter according to any one of (1) to (5), wherein the recognition information is formed by using an exposure apparatus or an exposure apparatus using a liquid crystal display substrate as a photomask. With board.

(7) The recognition information is formed from at least one selected from numbers, alphabets, hiragana, katakana, primary or two-dimensional bar codes, and geometric symbols. The substrate with a color filter according to any one of 1) to (6).

[0016]

Next, a preferred embodiment of the present invention will be described.

The color filter of the present invention has a black matrix provided on a transparent substrate, and a plurality of colored layers of three primary colors arranged on the black matrix. As the black matrix, a resin black matrix made of a resin and a light-shielding agent may be used, or an opaque film made of a metal such as Cr or Ni or an oxide thereof may be used. The color filter is composed of a large number of picture elements, with a pixel covered by each colored layer of three primary colors as one picture element. The black matrix here is
It shows a light-shielding region arranged between pixels, and is provided to improve display contrast of a liquid crystal display device.

The transparent substrate used as the substrate for the color filter is not particularly limited, and inorganic glass such as quartz glass, borosilicate glass, aluminosilicate glass, soda lime glass having a silica-coated surface, and organic glass. A plastic film or sheet is preferably used.

The size of the substrate is not particularly limited, but may be 550 × 650 mm class, 600 × 720 mm class.
Class, 620 × 720mm class, 650 × 750mm class, 7
A substrate or the like that is cut into a predetermined size such as a 50 × 900 mm class or a 900 × 1100 mm class and then bonded to an array substrate is preferably used.

The method of creating the recognition information when a black matrix or each colored layer is formed on the substrate is suitably used. In other words, when a photosensitive paste or a non-photosensitive paste and a photosensitive resist are stacked on a substrate in a laminated state and then patterned into a predetermined pattern,
It also creates recognition information.

Although not particularly limited, a method of forming recognition information using a material for forming a black matrix when forming a black matrix is preferably used. Since the material for the black matrix has a higher light-shielding property than other colored layers, the recognition information can be easily read by a CCD or the like. Further, the recognition information may be created using a material other than the black matrix and each colored layer. Although not particularly limited, a method in which recognition information is formed using an exposure apparatus or an exposure apparatus using a liquid crystal display substrate as a photomask and then developed is preferably used.

The recognition information is suitably used for performing system management such as process history of the substrate and sorting at the time of shipping and packing.

The information that can be recognized by the recognition information includes the type of the color filter, the manufacturing date, the series, the surface number, the ID of the manufacturing number, etc., the material of the board, the front and back, the top and bottom, and the like. May be selected as appropriate, or a combination of these may be used.

In order to provide such information to the recognition information,
Numbers, alphabets, hiragana, katakana, primary and secondary
A method of forming recognition information by combining one or a plurality of dimensional barcodes, geometric symbols, and the like is preferably used.

FIGS. 1 and 2 show an example of a substrate with a color filter obtained by the present invention.

In the substrate with a color filter, a substrate shape when a color filter is formed in a pattern is called a mother substrate 1. Color filter 2 using mother substrate 1
By producing the color filters 2, a larger number of color filters 2 can be produced at once than the cut substrate, and the production cost can be reduced.

However, it has become difficult to integrally bond the substrate with the color filter and the array substrate due to the enlargement of the substrate, and it is necessary to cut the glass into a predetermined glass size after forming the color filter 2 on the mother substrate 1. . As a result of cutting the substrate into a predetermined glass size, one or a plurality of cut substrates 1-1 to 1-6 with color filters and portions to be discarded as discarded portions 1a to 1d are generated.

For the purpose of the recognition information 3, 4, 5, the recognition information 3, 4, 5 is the mother board 1 and all the cut boards 1.
At least one of -1 to 1-6 is provided. In other words, when one cut substrate is cut out from one mother substrate, it is possible to make the recognition information of the mother substrate and the cut substrate identical. However, when cutting out two or more cut substrates, at least two pieces of recognition information are created on the mother substrate.

In some processes of manufacturing the color filter 2, the recognition information 3, 4, 5 can be read using a reading device such as a CCD camera to recognize the ID of the substrate. However, when a CCD camera is used as a reading device, there is a problem that a reading area becomes narrow. In addition, since it is very complicated to change the reading position of the reading device when the type is changed, it is preferable that the reading devices for the recognition information 3, 4, and 5 be at the same position regardless of the type.

In order to make the reading position of the recognition information 3, 4 and 5 of the reading device the same regardless of the type, the board reference 7 of the mother board 1 or the cut boards 1-1 to 1-6 is used.
What is necessary is to keep the distance between 8 and the recognition information 3, 4, 5 constant.
Here, the substrate references 7 and 8 are, for example, recognition information 3,
In the case where reading of 4 and 5 is performed during the roll transfer of the substrate, the transfer reference position, that is, the same portion regardless of the river width of the substrate. For example, when only one transport roller is changed by changing the river width, the other transport roller becomes the transport reference position, and when both transport rollers are changed uniformly, the river center of the substrate becomes the transport reference position.

The recognition information 3, 4, 5 is arranged in an area avoiding marks used for bonding the color filter 2 and the array substrate.

Therefore, when reading the mother board (hereinafter, referred to as the mother board)
Recognition information 3, 4 used for mother board)
5 is a method of arranging the recognition information 3, 4 and 5 in the discarded portions 1a to 1d when the cut portions 1-1 to 1-6 are outside the region, that is, when the discarded portions 1a to 1d are generated.

However, the discarded portion 1 in the mother substrate 1
In the case where a to 1d does not exist, or because the number of pieces of recognition information 3, 4, and 5 that can be created in one mother substrate 1 is restricted by the tact time, the recognition information 3, 4, and 5 may not be able to be arranged. In that case, the recognition information 3, 4, and 5 used also in the cut substrates 1-1 to 1-6 are arranged so that they can be used also in the mother substrate.

FIG. 1 shows an example in which the discarded parts 1a to 1d exist, but the recognition information 3 and 4 cannot be arranged in the discarded parts 1a to 1d due to the tact time.

The size of the mother substrate 1 is 550 × 65
0, the size of the cut substrates 1-1 to 1-6 is 275 × 21
0 mm, and the substrate references 7 and 8 are the center lines of the short sides of the mother substrate 1 and the long sides of the cut substrates 1-1 to 1-6.

The center of the recognition information 3 or 4 used at the time of the cut substrate is located 37.5 mm to the right of the substrate reference 8 of the cut substrates 1-1 to 1-6. Also, the center of the recognition information 3 used for the mother board is based on the board reference 7 of the mother board 1.
100 mm to the left of.

FIG. 2 shows an example in which the recognition information 5 used for the mother board 1 can be arranged in the discarded portions 1a to 1d. However, since FIGS. 1 and 2 are created using the same manufacturing line, the relationship between the recognition information 5 used for the mother board and the recognition information 4 used for the cut board is the same as that of FIG. Has become.

That is, from the above example, when the identification information used for the mother substrate and the identification information used for the cut substrate are the same, the relative position of the identification information used for the mother substrate to the center of the mother substrate and the identification information used for the cut substrate are used. This is to make the relative position of the cut substrate of information to the substrate center different.

At the same time, from the above example, when the cut substrate is arranged on the mother substrate, the recognition information used for the cut substrate is arranged asymmetrically with respect to the substrate center of the mother substrate.

In FIG. 1, since the identification information 3 used at the time of the cut substrate is used as the identification information used at the time of the mother substrate, the number of the identification information 3 and 4 on the mother substrate is
Although the number of cut substrates 1-1 to 1-6 is the same as that of FIG. 2, in FIG. 2, the recognition information 5 used for the mother substrate is arranged in the discarded portions 1a to 1d.
The number is five, which is one more than the number of 1-1 to 1-4. As a result, sheet management can be performed even on the mother substrate or the cut substrate.

[0041]

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments, but the efficacy of the present invention is not limited by the embodiments used.

The recognition information was created when the resin black matrix was created.

(1) Preparation of black paste and black paste coating 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride, 4,4'-diaminodiphenyl ether, and bis (3-aminopropyl) tetra Methyldisiloxane was reacted with N-methyl-2-pyrrolidone as a solvent to obtain a polyimide precursor (polyamic acid) solution.

A carbon black mill base having the following composition was mixed with a homogenizer at 7000 rpm for 3 hours.
The mixture was dispersed for 0 minutes, and the glass beads were filtered to prepare a black paste.

Carbon black mill base Carbon black (MA100, manufactured by Mitsubishi Kasei Co., Ltd.) 4.6 parts Polyimide precursor solution 24.0 parts N-methylpyrrolidone 61.4 parts Glass beads 90.0 parts 550 × 670 mm size A black paste is applied on a non-alkali glass (OA-2, manufactured by NEC Corporation) substrate using a spinner, and is then placed in an oven at 135 ° C.
For 20 minutes. Subsequently, a post type resist (Shipley “Micropost” RC100)
30 cp) with a spinner and dried at 90 ° C. for 10 minutes. The resist film thickness was 1.5 μm.

(2) Creation of recognition information and resin black matrix Exposure for patterning the black matrix is performed by an exposure apparatus (PLA-501F, manufactured by Canon Inc.).
Using a photomask.

Next, an exposure apparatus (two-dimensional code writing apparatus (Titler), manufactured by Toray Engineering Co., Ltd.) equipped with a liquid crystal display substrate as a photomask is used as recognition information.
Exposure and patterning were performed using With this exposure machine, it was possible to create recognition information at up to six locations on the substrate.

The recognition information is composed of numbers, alphabets, and two-dimensional bar codes, so that information on the type of substrate, type of color filter, series, and surface number can be recognized.

Thereafter, an aqueous solution containing 2% by weight of tetramethylammonium hydroxide at 23.degree. C. was used as a developing solution, and the substrate was dipped in the developing solution. Then, the development of the positive resist and the etching of the polyimide precursor were simultaneously performed. The development time was 60 seconds. Thereafter, the positive resist was peeled off with methylcellosolve acetate, and further cured at 300 ° C. for 30 minutes to obtain a substrate with identification information and a resin black matrix.

(3) Arrangement of Recognition Information The mark of the recognition information was 4 × 10 mm in size, and a CCD camera capable of reading a 5 × 5 mm range was used for the reading device. The recognition information is composed of numbers, alphabets, and two-dimensional barcodes. Of these, the two-dimensional barcode was used to recognize the substrate of the recognition information.
The two-dimensional barcode was 2 × 2 mm in size.

Each of the reading devices was set on a transport roller for transporting the substrate, so that the center of the substrate in the flow direction was the same regardless of the river width of the substrate. The center of the recognition information used at the time of the mother board is located at a position 100 mm to the left from the center of the board in the river width direction and 20 mm from the top in the flow direction. The center of the recognition information used at the time of the cut substrate was located at a position 37.5 mm to the right of the substrate center in the river width direction and 10 mm from the head in the flow direction.

[0052]

By using the substrate with the color filter of the present invention, the substrate can be recognized regardless of the state of the substrate, whether the mother substrate or the cut substrate. As a result, it is possible to easily perform the board single-wafer management in the board physical distribution management and the inspection process.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a substrate with a color filter prepared according to the present invention.

FIG. 2 is a schematic view showing another example of a substrate with a color filter prepared according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mother board 1-1-1-6: Cut board 1a-1d: Discarded part 2 ... Color filter 3 ... Recognition information used at the time of a mother board and a cut board, 4 ... Cut Recognition information used at the time of substrate, 5 ... Recognition information used at the time of mother substrate 6 ... Cut line, 7 ... Substrate reference (transport center line) and cut line at the time of mother substrate 8 ... Cut substrate Board reference at the time (center line of transfer)

Claims (7)

[Claims] 1. A substrate before cutting a substrate with a color filter into a predetermined size is called a mother substrate. When one or a plurality of substrates obtained by cutting the mother substrate into a predetermined size is called a cut substrate, A substrate with a color filter comprising at least one or more pieces of recognition information capable of recognizing the type and ID of the mother board and the cut board. 2. A method for recognizing a relative position between the recognition information used at the time of the mother board to recognize the type and the ID of the mother board and a board reference of the mother board, and a type and an ID of the cut board. 2. The substrate with a color filter according to claim 1, wherein a relative position between the recognition information used at the time of the cut substrate and a substrate reference of the cut substrate is different. 3. The identification information used for recognizing the type and ID of the substrate on the mother substrate, and the substrate when the mother substrate is cut into the cut substrate. 3. The substrate with a color filter according to claim 1, wherein the recognition information used for recognizing the type and ID of the mother substrate is asymmetrically arranged with respect to the center of the mother substrate. 4. 4. The color filter according to claim 1, wherein said recognition information used for recognizing a type and an ID of said mother substrate is arranged outside said cut substrate. With board. 5. The substrate with a color filter according to claim 1, wherein the number of the pieces of recognition information existing on the mother substrate is equal to or greater than the number of the cut substrates. 6. The substrate with a color filter according to claim 1, wherein the recognition information is formed by using an exposure device or an exposure device using a liquid crystal display substrate as a photomask. 7. The recognition information includes a numeral, an alphabet,
The substrate with a color filter according to any one of claims 1 to 6, wherein the substrate is formed from at least one selected from hiragana, katakana, a primary or two-dimensional barcode, and a geometric symbol.