KR101191450B1 - Photo Mask and Method for fabricating liquid crystal display panel using thereof - Google Patents
Photo Mask and Method for fabricating liquid crystal display panel using thereof Download PDFInfo
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- KR101191450B1 KR101191450B1 KR1020050135314A KR20050135314A KR101191450B1 KR 101191450 B1 KR101191450 B1 KR 101191450B1 KR 1020050135314 A KR1020050135314 A KR 1020050135314A KR 20050135314 A KR20050135314 A KR 20050135314A KR 101191450 B1 KR101191450 B1 KR 101191450B1
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- layer
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Abstract
A photo mask and a method of manufacturing a liquid crystal display panel using the same are provided. A photo mask according to an embodiment of the present invention, the photo mask is a transparent substrate; A light blocking layer formed on the transparent substrate; A first light transmitting layer formed on a region where the light blocking layer is not formed on the transparent substrate; And a second light transmitting layer formed on at least one of the transparent substrate, the light blocking layer, and the first light transmitting layer, wherein the second light transmitting layer has a higher transmittance than the first light transmitting layer. The first light transmitting layer and the second light transmitting layer are formed of different materials. A method of manufacturing a liquid crystal display panel according to an exemplary embodiment of the present invention includes forming at least two layers of a metal layer, an insulating layer, a protective layer, or a semiconductor layer on a substrate; Applying a flat photoresist without stepping on the top layer of the substrate comprising at least two regions of different heights; And a photoresist corresponding to each of the regions, the photomask including at least two light transmission layers having different light transmittances to form a photoresist pattern having a step at the boundary of each region or a thickness of the pattern at the respective regions. It includes a step.
Halftone mask, ashing, photoresist pattern
Description
1A to 1G are cross-sectional views of respective steps of a manufacturing process of a conventional method for manufacturing a liquid crystal display panel.
2 is a view for explaining a photo mask according to an embodiment of the present invention.
3 is a view for explaining a photoresist pattern according to an embodiment of the present invention.
4A to 4H are cross-sectional views of respective manufacturing process steps of a method of manufacturing a liquid crystal display panel according to an exemplary embodiment of the present invention.
DESCRIPTION OF THE REFERENCE NUMERALS (S)
200: photo mask 210: transparent substrate
220: light blocking layer 230: first light transmitting layer
240: second light transmitting layer 310: photoresist pattern
The present invention relates to a photomask and a method of manufacturing a liquid crystal display panel using the same, and more particularly, to a photomask and a method of manufacturing a liquid crystal display panel using the same, which can uniformly form a thickness of a photoresist pattern regardless of a step difference. It is about.
In recent years, due to the rapid progress of semiconductor technology, the demand for flat panel display devices as an electronic display device suitable for a new environment is rapidly increasing according to the trend of miniaturization, thinning, and lightening of electronic devices along with low voltage and low power of various electronic devices. It is increasing. Accordingly, flat panel display devices such as a liquid crystal display, a plasma display panel, an organic EL display, and the like are being developed. In particular, among flat panel display devices, a liquid crystal display device having a small size, a light weight, and a thin film is easy, and has a low power consumption and a low driving voltage.
The liquid crystal display device includes a liquid crystal display panel displaying an image and a driver for applying a driving signal to the liquid crystal display panel. Here, the liquid crystal display panel is composed of a front substrate and a rear substrate and a liquid crystal layer formed between the front substrate and the rear substrate to be bonded at predetermined intervals.
The front substrate is a color filter array substrate. The front substrate is a black matrix layer for blocking light except for the pixel region, and a red, green, and blue color filter layer for displaying color colors and images. A common electrode for implementation is formed. The back substrate is a thin film transistor array substrate, and includes a plurality of data lines arranged in a direction crossing the plurality of gate lines and the gate lines, and a plurality of pixel electrodes and data formed at each pixel defined by crossing the gate lines and the data lines. A plurality of thin film transistors for transmitting a line signal to each pixel electrode is formed. By applying different potentials to the pixel electrode and the common electrode included in the liquid crystal display panel, the molecular arrangement of the liquid crystal material of the liquid crystal layer is changed. The desired image may be realized by adjusting the amount of light transmitted through the transparent liquid crystal display panel according to the changed molecular arrangement.
As described above, the manufacturing method of the liquid crystal display panel having such a structure is required in the photolithography process method, which is a general semiconductor manufacturing method, to form each component in a micronized pattern on a transparent substrate as miniaturization and thinning are required. Follow.
1A to 1G are cross-sectional views of respective steps of a manufacturing process of a conventional method for manufacturing a liquid crystal display panel.
1A to 1G, which illustrate a process of manufacturing a back substrate of a liquid crystal display panel, the back substrate is formed according to the following steps.
First, as shown in FIG. 1A, an ITO (Indium-Tin-Oxide) is deposited on the transparent
Next, as shown in FIG. 1B, the
Next, as shown in FIG. 1C, the
Next, as shown in FIG. 1D, the source
Next, as shown in FIG. 1E, the
Next, as shown in FIG. 1F, the second
Next, as shown in FIG. 1G, after the ashing process of FIG. 1F, the back substrate is further completed through at least one process step using a photolithography method. The completed back substrate 100 includes a
Meanwhile, the second
Accordingly, an object of the present invention is to provide a photomask capable of uniformly forming a thickness of a photoresist pattern regardless of a step.
Another object of the present invention is to provide a method of manufacturing a liquid crystal display panel using the photo mask described above.
The technical objects to be achieved by the present invention are not limited to the technical matters mentioned above, and other technical subjects which are not mentioned can be clearly understood by those skilled in the art from the following description. There will be.
In accordance with another aspect of the present invention, a photomask is provided with a transparent substrate; A light blocking layer formed on the transparent substrate; A first light transmitting layer formed on a region where the light blocking layer is not formed on the transparent substrate; And a second light transmitting layer formed on at least one of the transparent substrate, the light blocking layer, and the first light transmitting layer, wherein the second light transmitting layer has a higher transmittance than the first light transmitting layer. The first light transmitting layer and the second light transmitting layer are formed of different materials.
In the photomask according to the embodiment of the present invention, the light blocking layer preferably includes chromium (Cr).
In addition, in the photomask according to the embodiment of the present invention, the first light transmitting layer preferably includes an organic material.
In addition, in the photo mask according to the embodiment of the present invention, the organic material preferably includes photo acryl.
In addition, in the photomask according to the embodiment of the present invention, the second light transmitting layer preferably includes chromium oxide (CrOx).
delete
According to another aspect of the present invention, there is provided a method of manufacturing a liquid crystal display panel, including: forming at least two layers of a metal layer, an insulating layer, a protective layer, or a semiconductor layer on a substrate; Applying a flat photoresist without stepping on the top layer of the substrate comprising at least two regions of different heights; And a photoresist corresponding to each of the regions, the photomask including at least two light transmission layers having different light transmittances to form a photoresist pattern having a step at the boundary of each region or a thickness of the pattern at the respective regions. It includes a step.
A method of manufacturing a liquid crystal display panel according to an embodiment of the present invention includes a first region having a first height of the substrate and a second region having a second height lower than the first height, The mask includes a first light transmitting layer corresponding to the first region and having a first light transmittance, and a second light transmitting layer corresponding to the second region and having a second light transmittance higher than the first light transmittance. It is preferable.
In the method of manufacturing a liquid crystal display panel according to an exemplary embodiment of the present invention, it is preferable that the first light transmitting layer includes an organic material.
In addition, in the method of manufacturing a liquid crystal display panel according to an exemplary embodiment of the present invention, it is preferable that the organic material includes photo acryl.
In addition, in the method of manufacturing a liquid crystal display panel according to an embodiment of the present invention, the second light transmitting layer preferably includes chromium oxide (CrOx).
In addition, in the method of manufacturing a liquid crystal display panel according to an exemplary embodiment of the present invention, it is preferable that the second transmission layer is formed on at least one layer of the first light transmitting layer or the light blocking layer that blocks the light.
Specific details of other embodiments are included in the detailed description and the drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. Like reference numerals refer to like elements throughout.
Hereinafter, with reference to the accompanying drawings, a specific embodiment according to the present invention will be described.
2 is a view for explaining a photo mask according to an embodiment of the present invention.
As shown in FIG. 2, the
The
The
The first
The second
3 is a view for explaining a photoresist pattern according to an embodiment of the present invention.
As shown in FIG. 3, a
As described above, the
In another embodiment of the present invention, the patterns of the
4A to 4H are cross-sectional views of respective manufacturing process steps of a method of manufacturing a liquid crystal display panel according to an exemplary embodiment of the present invention.
4A to 4H, a process of manufacturing a back substrate of a liquid crystal display panel according to an exemplary embodiment of the present invention is illustrated, and a back substrate is formed according to the following steps.
First, as shown in FIG. 4A, an indium-tin-oxide (ITO) is deposited on the transparent insulating
Next, as shown in FIG. 4B, the
Next, as shown in FIG. 4C, the
Thereafter, as shown in FIG. 4D, a
Thereafter, as shown in FIG. 4E, a
Thereafter, as shown in FIG. 4F, the
Thereafter, as shown in FIG. 4G, the
Thereafter, as shown in FIG. 4H, after the ashing process of FIG. 4G, the back substrate is further completed through at least one process step using a photolithography method. The completed back substrate 400 includes a
As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.
Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all aspects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.
As described above, according to the present invention, the thickness of the photoresist pattern can be uniformly formed regardless of the step by improving the structure of the photomask.
Moreover, this invention has the effect which can improve the efficiency of a manufacturing process by manufacturing a liquid crystal display panel using the photomask mentioned above.
Claims (12)
Priority Applications (1)
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KR1020050135314A KR101191450B1 (en) | 2005-12-30 | 2005-12-30 | Photo Mask and Method for fabricating liquid crystal display panel using thereof |
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KR1020050135314A KR101191450B1 (en) | 2005-12-30 | 2005-12-30 | Photo Mask and Method for fabricating liquid crystal display panel using thereof |
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KR20070071648A KR20070071648A (en) | 2007-07-04 |
KR101191450B1 true KR101191450B1 (en) | 2012-10-16 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100215850B1 (en) | 1996-04-12 | 1999-08-16 | 구본준 | Half-tone phase shift mask and fabrication method thereof |
KR100231937B1 (en) | 1996-06-10 | 1999-12-01 | 마찌다 가쯔히꼬 | Multi-level reticle system and method for forming multi-level photoresist profiles |
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2005
- 2005-12-30 KR KR1020050135314A patent/KR101191450B1/en active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100215850B1 (en) | 1996-04-12 | 1999-08-16 | 구본준 | Half-tone phase shift mask and fabrication method thereof |
KR100231937B1 (en) | 1996-06-10 | 1999-12-01 | 마찌다 가쯔히꼬 | Multi-level reticle system and method for forming multi-level photoresist profiles |
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