# US 7,410,734 B2 · Method of fabricating color filter

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- Number: US 7,410,734 B2
- Document ID: US7410734B2
- Status: Granted
- Kind: B2
- Application number: 11/161,991
- Filed: 2005-08-25
- Published: 2007-03-01
- Granted: 2008-08-12
- Earliest claimed: 2005-08-25
- Assignees: Chunghwa Picture Tubes, Ltd.
- Inventors: Feng-Lin Hsu; Huai-An Li; Yu-Cheng Lo; Jiun-Ming Wang; Yu-Hsien Chen
- Web page: https://patentgrep.com/patent/US7410734B2

## CPC

- G02B 5/201: {in the form of arrays}
- G02B 5/223: {containing organic substances, e.g. dyes, inks or pigments}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A method of fabricating a color filter is provided. First, a substrate having a light shielding layer formed thereon is provided, wherein the light shielding layer is adopted for defining a plurality of sub-pixel regions on the substrate. Next, a hydrophobic layer is formed on the light shielding layer by stencil printing, or a surface silylation treatment is carried out to clean the light shielding layer by inkjet printing. Next, a color filter layer is formed in the sub-pixel regions. Thus, fabrication method of the present invention is capable of reducing the possibility of intermixing the color ink between adjacent sub-pixel regions.

## Claims

### Claim 1

A method of fabricating a color filter, comprising:
providing a substrate having a light shielding layer disposed thereon, wherein the light shielding layer is adopted for defining a plurality of sub-pixel regions on the substrate;
performing a stencil printing process to form a hydrophobic layer on the light shielding layer; and
forming a color filter layer in the sub-pixel regions.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the stencil printing process comprises:
providing a stencil over the substrate for covering the sub-pixel regions such that the light shielding layer is exposed;
filling a liquid hydrophobic material onto the exposed light shielding layer;
solidifying the liquid hydrophobic material to form a solid hydrophobic layer; and
removing the stencil.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the hydrophobic layer comprises paraffin.

### Claim 4 (depends on 1)

The method according to claim 1, further comprising removing the solid hydrophobic layer after forming the color filter layer.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the hydrophobic layer is removed by using a solution.

### Claim 6 (depends on 5)

The method according to claim 5, wherein the solution comprises ether.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the color filter layer is formed by performing an inkjet printing process or a photolithography process.

### Claim 8 (depends on 1)

The method according to claim 1 wherein the light shielding layer is a black matrix.

### Claim 9 (depends on 8)

The method according to claim 8, wherein the black matrix comprises epoxy resin.