Bonding device for fabricating liquid crystal display and substrate for fabricating liquid crystal display

• US 20030173032A1
• Filed: 09/30/2002
• Published: 09/18/2003
• Est. Priority Date: 03/16/2002
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Park, Sang Ho, Lee, Sang Seok
• Granted Patent: US 7,255,147 B2
• Time in Patent Office: Days
• US Class Current: 156/382
• CPC Class Codes: B32B 2309/68 Vacuum
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 2457/202 LCD, i.e. liquid crystal displays
• CPC Class Codes: B32B 37/0046 characterised by constructional aspects of the apparatus
• CPC Class Codes: B32B 38/1841 during laying up
• CPC Class Codes: G02F 1/133354 Arrangements for aligning or assembling substrates
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 1/13415 Drop filling process
• CPC Class Codes: G03G 15/104 Preparing, mixing, transporting or dispensing developer
• CPC Class Codes: G03G 15/11 Removing excess liquid developer, e.g. by heat

Abstract

A bonding device for fabricating a liquid crystal display includes a vacuum chamber, an upper stage and a lower stage within the vacuum chamber, a stage moving system moving at least one of the upper and lower stages, a plurality of first observation holes formed through regions of the upper stage, a plurality of second observation holes formed through an upper portion of the vacuum chamber, each aligned to one of the plurality of first observation holes, and a plurality of alignment cameras, each camera aligned with the each of the first and second observation holes.

Claims

1. A bonding device for fabricating a liquid crystal display, comprising:

a vacuum chamber;

an upper stage and a lower stage within the vacuum chamber;

a stage moving system moving at least one of the upper and lower stages;

a plurality of first observation holes formed through regions of the upper stage;

a plurality of second observation holes formed through an upper portion of the vacuum chamber, each aligned to one of the plurality of first observation holes; and

a plurality of alignment cameras, each camera aligned with the each of the first and second observation holes.

2. The device according to claim 1, further including first and second substrates, each having a plurality of cell areas and dummy areas and alignment marks formed at corner regions of the cell areas.

3. The device according to claim 2, wherein the alignment marks are formed at dummy regions adjacent to the cell areas.

4. The device according to claim 2, wherein each of the first and second observation holes are aligned to each of the alignment marks

5. The device according to claim 1, further including first and second substrates, each having a plurality of cell areas and dummy areas and an alignment mark formed on at least two corner regions of the dummy areas on columns of the cell areas.

6. The device according to claim 5, wherein each of the first and second observation holes are aligned to each of the alignment marks.

7. The device according to claim 1, further including first and second substrates, each having a plurality of cell areas and dummy areas and an alignment mark formed on at least two corner regions of the dummy area on rows of the cell areas.

8. The device according to claim 7, wherein each of the first and second observation holes are aligned to each of the alignment marks.

9. The device according to claim 1, further including first and second substrates, each having a plurality of cell areas and dummy areas and an alignment mark formed on each central region of the dummy area on one of columns and rows of the cell areas.

10. The device according to claim 9, wherein the first and second observation holes are aligned to each of the alignment marks.

11. The device according to claim 1, wherein each of the alignment cameras move along a support rail to be aligned with each of the first and second observation holes.

12. The device according to claim 11, wherein each of the alignment cameras observe each of the alignment marks within a range of area.

13. The device according to claim 1, wherein each of the alignment cameras are at an exterior of the vacuum chamber.

14. The device according to claim 1, wherein each of the alignment cameras observe one of a plurality of alignment marks formed on each of first and second substrates.

15. The device according to claim 1, wherein each of the alignment cameras observe a central region between each of a plurality of alignment marks each formed on first and second substrates.

16. The device according to claim 1, wherein a first plurality of alignment cameras observe a first plurality of alignment marks at first portions of first and second substrates, and a second plurality of alignment cameras observe a second plurality of alignment marks at second portions of the first and second substrates between the first portions.

17. A substrate for fabricating a liquid crystal display, comprising:

a plurality of cell areas and dummy areas; and

an alignment mark formed on dummy areas adjacent to the cell areas.

18. The substrate according to claim 17, wherein the alignment marks are formed on the dummy areas adjacent to corner regions of the cell areas.

19. The substrate according to claim 17, wherein the alignment marks are formed on at least two corner regions of the dummy areas on the columns of the cell areas.

20. The substrate according to claim 17, wherein the alignment marks are formed on at least two corner regions of the dummy areas the rows of the cell areas.