IP Library Granted Patent US 7,224,425
Granted Patent B2
US 7,224,425 · App. 10/787,234 · Granted May 29, 2007

System and method of manufacturing liquid crystal display wherein the bonding of the printed circuit film on the panel assembly is inspected

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Quick Facts
Patent No.
US 7,224,425
App. No.
10/787,234
Granted
May 29, 2007
Kind
B2
Abstract

A liquid crystal panel assembly is manufactured and a printed circuit film such as a tape carrier package (TCP) is bonded on the panel assembly. The bonding of the printed circuit film on the panel assembly is inspected using a differential camera, a different scope, etc. A printed circuit board (PCB) is bonded to the printed circuit film and the bonding of the printed circuit film on the panel assembly is inspected again.

Claims (28)

1. A system of manufacturing a liquid crystal display, the system comprising:

a panel manufacturing unit for manufacturing a liquid crystal panel assembly including a thin film transistor (TFT) array panel, a color filter array panel, and a liquid crystal layer interposed between the TFT array panel and the color filter array panel;

a printed circuit film bonding unit that bonds by compression a printed circuit film on the panel assembly with an adhesive containing a plurality of conductive particles;

a printed circuit board (PCB) bonding unit for bonding a PCB to the printed circuit film; and

an inspection unit for inspecting the bonding of the printed circuit film on the panel assembly and determining whether a dent number is uniform, wherein the dent number is the number of conductive particles between the gate pads of the TFT array panel and leads on said printed circuit film.

2. The system of claim 1 , wherein the printed circuit film comprises a tape carrier package.

3. The system of claim 1 , wherein the inspection unit comprise a differential camera or a differentials scope.

4. The system of claim 1 , wherein the printed circuit film bonding unit bonds the printed circuit film on the panel assembly with an anisotropic conductive film (ACF).

5. The system of claim 4 , wherein the ACF comprises an adhesive containing a plurality of conductive particles.

6. The system of claim 5 , wherein the printed circuit film bonding unit bonds the printed circuit film, on the panel assembly by compression.

7. The system of claim 1 , wherein the inspection unit detects alignment of the printed circuit film with the panel assembly.

8. The system of claim 1 , wherein the bonding inspection unit is incorporated into the printed circuit film bonding unit or the PCB bonding unit.

9. The system of claim 1 , wherein the bonding inspection unit comprises two sub-units for inspection before and after the bonding of the PCB, respectively.

10. The system of claim 9 , wherein one of the sub-units of the bonding inspection unit is incorporated into the printed circuit bonding unit and the other of the sub-units of the bonding inspection unit is incorporated into the PCB bonding unit.

11. A method of manufacturing as liquid crystal display, the method comprising:

manufacturing a liquid crystal panel assembly;

bonding a printed circuit film on the panel assembly by thermocompression, wherein the printed circuit film is bonded on the panel assembly with an anisotropic conductive film (ACF) containing a plurality of conductive particles;

bonding a printed circuit board (PCB) to the printed circuit film, and

inspecting the bonding of the printed circuit film on the panel assembly and detecting whether a dent number is uniform, wherein the dent number is the number of conductive particles between the gate pads of the TFT array panel and leads on said printed circuit film.

12. The method of claim 11 , wherein the printed circuit film comprises a tape carrier package.

13. The method of claim 11 , wherein the inspection is performed using a differential camera or a differentials scope.

14. The method of claim 11 , wherein the inspection is performed before the bonding of the PCB.

15. The method of claim 14 , further comprising inspecting the bonding of the printed circuit film on the panel assemble again after the bonding of the PCB.

16. The method of claim 11 , wherein the inspection is performed after the bonding of the PCB.

17. The method of claim 11 , further comprising

applying the anisotropic conductive film on the panel assembly before bonding a printed circuit film on the panel assembly,

pre-curing the anisotropic conductive film by using a pre-heating head, and

pre-pressing the printed circuit film on the anisotropic conductive film.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 17, 2012
From: SAMSUNG ELECTRONICS CO., LTD.
To: SAMSUNG DISPLAY CO., LTD.
Reel/Frame 029045/0860 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 18, 2004
From: YU, IN-KWANG
To: SAMSUNG ELECTRONICS CO., LTD.
Reel/Frame 015689/0314 →