Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Screen other than for cathode-ray tube
Reexamination Certificate
2002-06-20
2004-12-14
McPherson, John A. (Department: 1756)
Radiation imagery chemistry: process, composition, or product th
Radiation modifying product or process of making
Screen other than for cathode-ray tube
C430S321000, C347S106000, C347S107000, C445S024000, C313S505000
Reexamination Certificate
active
06830855
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of Invention
The present invention relates to a color filter and a method of producing the same, a droplet spotting precision test substrate for a color filter and a method of producing the substrate, a light emission substrate and a method of producing the same, a droplet potting precision test substrate for a light emission substrate and a method of producing the substrate, an electrooptic device and electronic apparatus each including the color filter or the light emission substrate, and a film deposition method and apparatus.
2. Description of Related Art
In recent years, demands for liquid crystal displays have increased with progress in personal computers, particularly portable personal computers. Accordingly, there is an urgent need to establish a high quality display at a reasonable cost. From the viewpoint of environmental protection, it has recently been required to convert to an improved process capable of decreasing environmental loading.
Currently, as a conventional method of producing a color filter, the following method is known. In this method, a chromium thin film as a light shielding material is first patterned by photolithography and etching to form a black matrix. Then, apertures of the black matrix are coated with photosensitive resins of red, green and blue by spin coating for each color, and then patterned by photolithography. As a result, a color matrix can be formed, in which colored layers (dots) of red, green and blue are arranged adjacent to each other. In the production method, the photolithography step must be performed for each of the respective colors of read, green and blue, and the photosensitive material is lost due to removal of an unnecessary portion during patterning of each color, resulting in a color filter having high environmental loading and high cost.
SUMMARY OF THE INVENTION
As a method for resolving the problem of the production method, for example, Japanese Unexamined Patent Application Publication No. 59-75205 proposes a method using an ink jet process. In this method, a material having low wettability with ink is deposited in a matrix to form a partition for dividing a colored layer formation region, and then the regions within the partition are coated with a non-photosensitive color material by the ink jet process to form the colored layers. This production method can decrease complexity of the photolithography process, and further decrease the loss of the color material. Therefore, there have been many proposals of color filter producing methods each including the step of coating the non-photosensitive color material by a droplet discharge method such as the ink jet process or the like.
An object of the present invention is to provide a color filter and a light emission substrate each of which is formed by discharging a droplet material. The invention can include a light shielding region with sufficient light shielding performance and a transmitting region without color mixing, and exhibits high contrast without a pixel defect and irregularity in color tone.
Another object of the present invention is to provide a method of producing a color filter and a method of producing a light emission substrate, which are capable of precisely applying a color material to a predetermined region by discharging a droplet material.
A further object of the present invention is to provide a droplet material spotting precision test substrate for a color filter and a method of producing the substrate, and a droplet material spotting precision test substrate for a light emission substrate and a method of producing the substrate, both of which are used for precisely applying a coloring material to a predetermined region by discharging a droplet material.
A still further object of the present invention is to provide a method of measuring droplet material spotting precision by using the color filter, the light emission substrate or the droplet material spotting precision test substrate for the color filter or the light emission substrate.
A further object of the present invention is to provide an electrooptic device and an electronic apparatus each including the color filer or the light emission substrate.
A further object of the present invention is to provide a film deposition method and a film deposition apparatus each using a droplet material.
The color filter and method of measuring spotting precision of a droplet material of the present invention can include a pixel region having a light shielding region and a transmitting region partitioned by the light shielding region, and a spotting precision test region positioned apart from the pixel region. The invention can also include a first light shielding layer provided in the light shielding region, a color element provided in the transmitting region, a second light shielding layer provided in the spotting precision test region, and a spotting precision test layer provided in the spotting precision test region so as to cover at least the second light shielding layer. An evaluation region partitioned by the second light shielding layer can be provided in the spotting precision test region.
In the color filter of the present invention, the pixel region can mean a region including pixels used for the color filter. The spotting precision test region can mean a region of the color filter, in which the pixels are not formed, or a region including pixels not used for as pixels for the color filter. The evaluation region can mean a region serving as an evaluation object of spotting precision of a droplet material in a spotting precision test of the droplet material.
The color filter of the present invention can include the evaluation region provided in the spotting precision test region, and thus the spotting precision test of the droplet material can be performed on the spotting precision test layer, thereby permitting the droplet material to be precisely applied to a predetermined region in the pixel region. Therefore, the color filter of the present invention has sufficient light shielding performance in the light shielding region, and causes no color mixing in the transmitting region, thereby causing neither pixel defect nor irregularity in color tone, and high contrast. This color filter is described in detail in “Description of Embodiments” below.
The invention can also include a color filter including a pixel region having a light shielding region and a transmitting region surrounded by the light shielding region, a color element formed in the transmitting region by discharging a droplet material, and a peripheral region arranged adjacent to the pixel region and having a light shielding region. The invention can further include an evaluation region included in the peripheral region and surrounded by the light shielding region of the peripheral region to have a shape corresponding to the shape of the transmitting region.
The color filter of the present invention includes the evaluation region, and thus the spotting precision test of the droplet material can be performed on the evaluation region, thereby permitting the droplet material to be precisely applied to a predetermined region in the pixel region. Therefore, the color filter of the present invention has sufficient light shielding performance in the light shielding region, and causes no color mixing in the transmitting region, thereby causing neither pixel defect nor irregularity in color tone, and high contrast.
The present invention can include a color filter having a pixel region having a light shielding region and a transmitting region surrounded by the light shielding region, a color element formed in the transmitting region by discharging a droplet material, a peripheral region arranged adjacent to the pixel region and having a light shielding region, an evaluation region included in the peripheral region and surrounded by the light shielding region of the peripheral region, and a layer having the property of repelling the droplet material and provided in the peripheral region so as to cover the regi
Aruga Hisashi
Ito Tatsuya
Katagami Satoru
Kiguchi Hiroshi
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