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Donor sheet, color filter, organic EL element and method for producing them

a technology of organic el elements and donor sheets, applied in the field of laser beam thermal imaging process, can solve the problems of complex processing devices, complicated working, and many conventional methods for forming black matrix, and achieve the effects of reducing manufacturing steps, high contrast, and reducing labor intensity

Inactive Publication Date: 2005-07-21
3M INNOVATIVE PROPERTIES CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020] It is an object of the present invention to solve the above-described problems of the prior art and to provide a donor sheet, which can produce an separation member of an optical element, e.g. partition pattern and black matrix of a color filter, by a shortened manufacturing step with ease and accuracy at high contrast, and can impart excellent ink repellency, i.e. water repellency and oil repellency to the separation member.

Problems solved by technology

By the way, a conventional method of forming a black matrix has several problems.
Therefore, not only the working is complicated, but also problems such as complexation of a processing device and increase in manufacturing cost occur.
In this case, however, a photoresist method must be used for patterning the metal thin film and, therefore, the above-described problems can not be avoided.
A method of forming a black matrix of metal according to a deposition method, electroless plating method or the like without using a photoresist method is also considered, however, a problem about the processing step is remained and there is not a merit as compared with the photoresist method.

Method used

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  • Donor sheet, color filter, organic EL element and method for producing them
  • Donor sheet, color filter, organic EL element and method for producing them
  • Donor sheet, color filter, organic EL element and method for producing them

Examples

Experimental program
Comparison scheme
Effect test

example 1

(1) Production of Donor Sheet

[0133] A donor sheet comprising a base, a light-to-heat conversion layer, an intermediate layer and a transfer layer, said layers being formed on the base, was produced according to the following procedure.

[0134] After a polyethylene terephthalate (PET) film having a thickness of 75 μm was prepared as a base, a light-to-heat conversion layer (LTHC layer), an intermediate layer and a transfer layer each having the following composition and film thickness were formed in the order as described below. The (LTHC layer) and the intermediate layer were coated with die coating method, followed by being cured by irradiation with ultraviolet rays, and then the transfer layer was similarly formed with die coating method.

Light-to-heat conversion layerCarbon black100.0% by weight(trade name: “Raben 760”, manufacturedby Colombian Carbon Co.)Dispersant 8.9% by weight(trade name: “Disperbyk 161”, manufacturedby BYK-Cheimie Co.)Vinyl butyral resin 17.9% by weight(tr...

example 2

[0147] The procedure of Example 1 was repeated with the proviso that, in this example, a glass substrate with chromium (Cr) black matrix (hereinafter, referred to as “CrBM”) was used in place of the glass substrate, and a separation rib was produced on the black matrix of the substrate in accordance with the following method.

[0148] Using an exclusive LITI machine (laser beam thermal transfer machine, wavelength of laser beam: 1064 nm), a separation rib was laid on a glass substrate provided with a black matrix. The donor sheet produced in Example 1 was laid on the black matrix side of the glass substrate, and then laser beam was irradiated from the side of the donor sheet in the same striped pattern as that of the black matrix under the conditions of an output of 11 W, a scan speed of 15m / s and an irradiation width of 20 μm. Then, baking was conducted in an oven at 230° C. for 1 hour so as to cure and adhere the transferred portion. A separation rib having a width of 20 μm and a th...

example 3

[0156] The procedure of Example 1 was repeated with the proviso that, in this example, a solvent-based color ink was used as in Comparative Example 1, and an amount of the fluororesin added was changed from 0.05% by weight to 7.62% by weight.

[0157] The evaluation test similar to that of Example 1 was carried out using the resulting glass substate with the partition pattern (black matrix). As shown in the following Table 1, the contact angle was 45°, the critical surface tension was 20 dyne / cm, no color mixture was observed, and the color spot was rated “good”.

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Abstract

A donor sheet for transferring an image pattern to an image receiving element by a thermal imaging process using laser beam, comprising a base having formed in order on the base a light-to-heat conversion layer, and a transfer layer containing an image component which is melted by heating due to an action of the light-to-heat conversion layer and transferred to the image receiving element in a patterned form, in which the image component of the transfer layer contains an ink-repellent or solvent-repellent compound in an optimized amount. Using the donor sheet, it becomes possible to produce an separation member such as partition pattern and black matrix of a color filter by a shortened manufacturing step with ease and accuracy at high contrast, and can impart excellent ink repellency to the separation member.

Description

TECHNICAL FIELD [0001] The present invention relates to a thermal imaging process using laser beam and, more particularly, to a donor sheet (so-called “image forming sheet”) used in the process, and an optical element formed by using the donor sheet, particularly, color filter and organic EL element and their production methods. Particularly, the present invention relates to a method of producing a separation rib of a color filter, a black matrix of a liquid crystal display device and a partitioning wall (bank) of an organic EL element. A thermal imaging process using laser beam is generally referred to as a laser beam thermal transfer method or LITI (Laser-induced Thermal Imaging) method. BACKGROUND ART [0002] As is well known, an ink-jet recording method is one method of printing methods and is utilized in various fields of image formation because multi-color fine images can be formed. For example, the ink-jet recording method is used for formation of a picture element area in the...

Claims

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Application Information

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IPC IPC(8): B41J2/325B41M5/26B41M5/382B41M5/392B41M5/395B41M5/42B41M5/46G02B5/20G02F1/1335H01L27/32H01L51/40H01L51/50H05B33/10H05B33/12H05B33/14H05B33/22
CPCB41M5/265H05B33/10B41M5/395B41M5/42G02B5/201G02F1/133512H01L27/3246H01L27/3283H01L27/3295H01L51/0004H01L51/0005H01L51/0013H01L51/5012H01L51/56B41M5/38214Y10S428/917Y10S430/146Y02E10/549H10K59/122H10K59/173H10K71/13H10K71/135H10K71/18H10K50/11H10K71/421B41M5/40H10K71/00
Inventor TSUKAMOTO, YOJIIWASAWA, MASARUSHIMODA, TATSUYAMIYASHITA, SATORUKIGUCHI, HIROSHI
Owner 3M INNOVATIVE PROPERTIES CO
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