APPARATUS AND METHOD FOR FORMING PATTERN

Abstract

The present invention relates to an apparatus and method for forming a predetermined pattern on a substrate using a gravure offset printing method. The apparatus for forming a pattern using a gravure offset printing method comprises a gravure on which a pattern to be filled with a color resist is formed; a roller brought into contact with the gravure to transfer the pattern formed on the gravure to the roller and then to print the transferred pattern onto a substrate; a roller driving means for rotating and horizontally driving the roller to transfer the pattern formed on the gravure to the roller and then to print the transferred pattern onto the substrate as it is; and a substrate support on which the substrate is placed. Further, the roller driving means includes a rotational driving unit for rotationally driving the roller; a horizontal driving unit for horizontally driving the roller independently of the rotational driving unit; and a control unit for controlling driving speeds of the rotational and horizontal driving units.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present invention will become apparent from the following description of a preferred embodiment given in conjunction with the accompanying drawings, in which:

FIGS. 1 and 2 are plan views showing a structure of a color filter;

FIG. 3 is a view illustrating a conventional gravure offset printing process;

FIG. 4 is a view showing a structure of a conventional roller driving means;

FIG. 5 is a plan view showing a structure of a pattern forming apparatus according to an embodiment of the present invention;

FIG. 6 is a perspective view showing a structure of a roller driving means according to an embodiment of the present invention;

FIG. 7 is a view showing a roller driving speed in respective intervals according to an embodiment of the present invention; and

FIG. 8 is a view illustrating a process of forming a pattern according to an embodiment of the present invention.

Claims

1. An apparatus for forming a pattern using a gravure offset printing method, comprising: a gravure on which a pattern to be filled with a color resist is formed;a roller brought into contact with the gravure to transfer the pattern formed on the gravure to the roller and then to print the transferred pattern onto a substrate;a roller driving means for rotating and horizontally driving the roller to transfer the pattern formed on the gravure to the roller and then to print the transferred pattern onto the substrate as it is; anda substrate support on which the substrate is placed,wherein the roller driving means includes:a rotational driving unit for rotationally driving the roller;a horizontal driving unit for horizontally driving the roller independently of the rotational driving unit; anda control unit for controlling driving speeds of the rotational and horizontal driving units.

2. The apparatus as claimed in claim 1, wherein the rotational driving unit is a servo motor.

3. The apparatus as claimed in claim 1, wherein the horizontal driving unit is a linear motor.

4. The apparatus as claimed in claim 1, further comprising a plate-shaped compensating member provided at a front end of a region of the substrate support where the substrate is placed, the compensating member being brought into contact with the roller to assist in initial acceleration of the roller before the roller comes into contact with the substrate.

5. The apparatus as claimed in claim 4, wherein the compensating member has a thickness which is equal to or smaller than that of the substrate.

6. The apparatus as claimed in claim 4, wherein the compensating member is made of an elastic material.

7. The apparatus as claimed in claim 4, wherein the compensating member is made of a material with a coefficient of thermal expansion similar to that of the substrate.

8. The apparatus as claimed in claim 1, further comprising a plate-shaped compensating member provided at a rear end of a region of the substrate support where the substrate is placed, the compensating member being brought into contact with the roller to assist in deceleration of the roller after the roller has been brought into contact with the substrate.

9. The apparatus as claimed in claim 1, further comprising a plasma pretreatment unit for causing a surface of the substrate to be pretreated with plasma.

10. A method for forming a predetermined pattern on a substrate using a gravure offset printing method, comprising the steps of: 1) measuring a pattern formed on a gravure;2) compensating a ratio between rotational and linear motions of a roller;3) discharging a color resist onto a surface of the gravure;4) bringing a doctor blade into contact with the surface of the gravure to fill the pattern of the gravure with the color resist;5) bringing the roller into contact with the surface of the gravure to transfer the pattern formed on the gravure to the roller; and6) driving rotationally and horizontally the roller to print the pattern formed on the roller onto the substrate in a state where the roller is brought into contact with the substrate.

11. The method as claimed in claim 10, wherein the horizontal and rotational driving of the roller in step 6) is performed by means of separate driving means, respectively.

12. The method as claimed in claim 10, further comprising the step of causing a surface of the substrate to be pretreated with plasma before step 6).