EP0376165A2
Expired / Lapsed
EP
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Method for manufacturing a liquid crystal display device
Assignee: Toshiba Corp
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Filing: 1989-12-21
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Granted: —
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Expires: 2009-12-21
Abstract
Abstract In a method for manufacturing a liquid crystal display device, address and data lines (40, 48) are provided over a substrate (32), and a short-circuit area (70, 72) and areas to be made short-circuit are provided to cause short-circuiting between the address and data lines. It is prevented a TFT array from dielectric breakdown by static electricity in manufacturing processes, and examination is made for a connection breakage, and short-circuiting, at a TFT array for the liquid crystal display device, prior to the manufacturing step by cutting the short-circuit. Moreover, it can be percentage from dielectric breakdown by static electricity in later processes to short the area to be made short-circuit after the examination. It is possible to both decrease a faults percentage of liquid crystal devices and improve their productivity.
Inventors
- 👤 Masanori C/O Intellectual Prop. Div. Abe
- 👤 Yoshiaki C/O Intellectual Prop. Div. Komatsubara
- 👤 Tsuyoshi C/O Intellectual Prop. Div. Iyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 13:43
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1306; G02F1/1309; G02F1/1333; G02F1/1345; G02F1/136; G02F1/1362; G02F1/136204; G02F1/136254
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
A method for manufacturing a liquid crystal display device, comprising the steps of: (a) forming a plurality of address lines (40) and a plurality of data lines (48), in an intersecting fashion, over a first substrate (32); (b) forming at least one short-circuit line (70, 72) for shortcircuiting the address and data lines; (c) subsequent to forming the short-circuit line, cutting the short-circuit line; (d) examining, subsequent to the cutting step, the presence or absence of a connection breakage and that of short-circuiting; (e) forming a electrode (60) on a second substrate (34); and (f) sealing a liquid crystal composition (36) between the first and second substrate, characterized in that (g) the step (b) includes forming at least one area (82, 82a) to be made short-circuit having two short-circuit electrodes connected to the short-circuit lines of the address and data lines, the two short-circuit electrodes being located opposite to each other with an insulating film (42) formed therebetween, and by comprising (h) subsequent to the step (d), the area to be made short-circuit is exposed to a laser beam to make short-circuiting between the two short-circuit electrodes; and (i) subsequent to making a short-circuit between the two short-cricuit electrodes but prior to completing the liquid crystal display element, the short-circuit line are cut off.
Claim 2
Independent Claim
214 words
A method for manufacturing a liquid crystal display device, comprising the steps of: (a) forming a plurality of address lines (40) and a plurality of data lines (48), in an intersecting fashion, over a first substrate (32); (b) forming at least one short-circuit line (70, 72) for shortcircuiting the address and data lines; (c) subsequent to forming the short-circuit line, cutting the short-circuit line; (d) examining, subsequent to the cutting step, the presence or absence of a connection breakage and that of short-circuiting; (e) forming a electrode (60) on a second substrate (34); and (f) sealing a liquid crystal composition (36) between the first and second substrate, characterized in that (g) the step (b) includes forming at least one area (82, 82a) to be made short-circuit having two short-circuit electrodes connected to the short-circuit lines of the address and data lines, the two short-circuit electrodes being located opposite to each other with an insulating film (42) formed therebetween, and by comprising (h) subsequent to the step (d), the area to be made short-circuit is exposed to a laser beam to make short-circuiting between the two short-circuit electrodes; and (i) subsequent to making a short-circuit between the two short-cricuit electrodes but prior to completing the liquid crystal display element, the short-circuit line are cut off.
Claim 3
Dependent Claim
31 words
The method according to claim 1, characterized in that, in the step (c), a spot between the short-circuit lines of the address and data lines is exposed to a laser beam.
Claim 4
Dependent Claim
42 words
The method according to claim 1, characterized in that said at least one area to be made short-circuit is formed in the neighborhood of a corner where the short-circuit line of said address line is connected to that of said data line.
Claim 5
Dependent Claim
40 words
The method according to claim 2, characterized in that said at least one area to be made short-circuit is located at vicinities of corners where said short-circuit of said address line is connected to said short-circuit of said data line.
Claim 6
Independent Claim
138 words
A method for manufacturing a liquid crystal display device comprising the steps of: (a) forming a plurality of address lines (40) and a plurality of data lines (48), in an intersecting fashion, over a first substrate (32); (b) examining the presence or absence of a connection breakage, and that of short-circuiting, between the address and data lines; (c) forming a electrode (60) on a second substrate (34); (d) sealing a liquid crystal composition (36) between the first and second substrates, and characterized in that (e) subsequent to the step (a), said address and data lines are, each, formed of a U-shape with the two adjacent lines arranged in an interdigital fashion; and by comprising (f) forming a plurality of short-circuit lines (70, 72) in a manner to have the plurality of address lines connected in a single array.
Claim 7
Independent Claim
138 words
A method for manufacturing a liquid crystal display device comprising the steps of: (a) forming a plurality of address lines (40) and a plurality of data lines (48), in an intersecting fashion, over a first substrate (32); (b) examining the presence or absence of a connection breakage, and that of short-circuiting, between the address and data lines; (c) forming a electrode (60) on a second substrate (34); (d) sealing a liquid crystal composition (36) between the first and second substrates, and characterized in that (e) subsequent to the step (a), said address and data lines are, each, formed of a U-shape with the two adjacent lines arranged in an interdigital fashion; and by comprising (f) forming a plurality of short-circuit lines (70, 72) in a manner to have the plurality of address lines connected in a single array.
Claim 8
Dependent Claim
41 words
The method according to claim 5, characterized in that in said step (g), n-th and (n+2)-th address lines which are counted from an end are connected by a short-circuit line (70, 72) to each other, where n = a natural number.
Claim 9
Independent Claim
137 words
A method for manufacturing a liquid crystal display device, comprising the steps of: (a) forming a plurality of address lines (40) and a plurality of data lines (48), in an intersecting fashion, over a first substrate; (b) examining the presence or absence of a connection breakage, and that of short-circuiting, between the address and data lines; (c) forming a electrode (60) over a second substrate (34); and (d) sealing a liquid crystal composition (36) between the first and second substrate, characterized in that (e) said address and data lines are so formed as to have a U-shape, each, with the respective U-shaped address and data lines arranged in an interdigital fashion; and by comprising (f) in said step (b), a plurality of short-circuit lines (70, 72) are so provided as to be connected as a single array.
Claim 10
Independent Claim
137 words
A method for manufacturing a liquid crystal display device, comprising the steps of: (a) forming a plurality of address lines (40) and a plurality of data lines (48), in an intersecting fashion, over a first substrate; (b) examining the presence or absence of a connection breakage, and that of short-circuiting, between the address and data lines; (c) forming a electrode (60) over a second substrate (34); and (d) sealing a liquid crystal composition (36) between the first and second substrate, characterized in that (e) said address and data lines are so formed as to have a U-shape, each, with the respective U-shaped address and data lines arranged in an interdigital fashion; and by comprising (f) in said step (b), a plurality of short-circuit lines (70, 72) are so provided as to be connected as a single array.
Claim 11
Dependent Claim
61 words
The method according to claim 7, characterized in that in said step (f), n-th and (n+2)-th address lines which are counted from an end are connected as a single array to each other wherein n = a natural number, and the address and data lines are connected by a corresponding short-circuit line to each other to provide a single line array.
References Cited (Backward Citations)
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