EP0569601A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal display and method of manufacturing same
Assignee: Seiko Epson Corp
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Filing: 1992-11-27
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Granted: —
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Expires: 2012-11-27
Abstract
Abstract As shown in the figure, on a transparent substrate (209) provided with a matrix array, a black matrix (216) consisting of molybdenum silicide layers (216bb...) is present for each of picture element regions (201bb...). These molybdenum silicide layers (216bb) are insulated and separated from data lines (202a, 202b), gate lines (203a, 203b) and molybdenum silicide layers (216ab, 216ba...) disposed therearound on a boundary region with picture element regions disposed therearound, but, conductively connected to the picture element electrode (206) of the picture element region (201bb). Here, the outermost edges of the molybdenum silicide layer (216bb) and the corresponding outermost edges of the picture element electrode (206) coincide with each other. <IMAGE>
Inventors
- 👤 Mutsumi Seiko Epson Corporation Matsuo
- 👤 Ichio Seiko Epson Corporation Yudasaka
- 👤 Kiyohiko Seiko Epson Corporation Kanai
- 👤 Katsumi Seiko Epson Corporation Nagase
- 👤 Takashi Seiko Epson Corporation Inoue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 03:27
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136209; G02F1/136227
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
132 words
A liquid crystal display device comprising a first pixel region among pixel regions formed on the surface of a transparent substrate by sectioning with data lines and gate lines, wherein said first pixel region includes a thin film transistor having a source, to which a potential is applied from said data lines, and gate electrode, to which a potential is applied from said gate lines, a pixel electrode to which a potential can be applied via a drain of said thin film transistor, and a conductive and light shielding layer formed in at least one boundary region between said pixel region and a second pixel regions adjacent to it, insulated and separated from said data lines and said gate lines, and electrically connected to said pixel electrode of said first pixel region.
Claim 2
Dependent Claim
35 words
A liquid crystal display device according to claim 1, wherein said conductive and light shielding layer has an outer end positioned on a boundary region between said first pixel region and said second pixel regions.
Claim 3
Dependent Claim
49 words
A liquid crystal display device according to claim 1, wherein said first pixel region has said conductive and light shielding layer in any boundary region to said second pixel region, and said first pixel region is sectioned from said second pixel regions by said conductive and light shielding layer.
Claim 4
Dependent Claim
70 words
A liquid crystal display device according to claim 1, wherein said first pixel region has said conductive light shielding layers in two boundary regions among said boundary regions from said second pixel regions, and is sectioned from said second pixel regions by said conductive and light shielding layers and said conductive and light shielding layers that are present adjacent to two other boundary regions adjacent to said second pixel regions.
Claim 5
Dependent Claim
67 words
A liquid crystal display device according to any one of claims 1 to 4, wherein substantially the whole surface of said data line is in a state it is, via an interlayer insulating film, covered with at least either said conductive and light shielding layer in said corresponding pixel region or said conductive and light shielding layer in said second pixel region adjacent via said data line.
Claim 6
Dependent Claim
60 words
A liquid crystal display device according to any one of claims 1 to 5, wherein either said pixel electrode or said conductive and light shielding layer is electrically connected to said drain via a connection hole of said interlayer insulating film, and the residual one is electrically connected to either said pixel electrode or said conductive and light shielding layer.
Claim 7
Dependent Claim
61 words
A liquid crystal display device according to claim 6, wherein said pixel electrode and said conductive and light shielding layer are formed via an upper-layer-side interlayer insulating film formed on the surface of a lower-layer-side interlayer insulating film which is said interlayer insulating film, and are electrically connected to each other via said connection hole of said upper-layer-side interlayer insulating film.
Claim 8
Dependent Claim
40 words
A liquid crystal display device according to claim 6, wherein at least a portion of either said pixel electrode or said conductive and light shielding layer is formed on the surface of the residual one and they are electrically connected.
Claim 9
Dependent Claim
29 words
A liquid crystal display device according to claim 8, wherein the outer ends of said pixel electrode and said conductive and light shielding layer substantially coincide with each other.
Claim 10
Dependent Claim
72 words
A liquid crystal display device according to any one of claims 1 to 5, wherein either said pixel electrode or said conductive and light shielding layer is electrically connected to said drain via a stacked electrode having conductivity and electrically connected to said drain via said connection hole of said interlayer insulating film, and the residual one is electrically connected to either said pixel electrode or said conductive and light shielding layer.
Claim 11
Dependent Claim
18 words
A liquid crystal display device according to claim 10, wherein said stacked electrode layer also has light transmissivity.
Claim 12
Dependent Claim
25 words
A liquid crystal display device according to claim 11, wherein both of said stacking electrode layer and said pixel electrode are constituted by ITO layers.
Claim 13
Dependent Claim
24 words
A liquid crystal display device according to claim 11 or 12, wherein said pixel electrode has the outer end positioned above said data line.
Claim 14
Dependent Claim
51 words
A liquid crystal display device according to any one of claims 10 to 13, wherein said stacked electrode layer is formed to reach a non-formation region in which said thin film transistor is not formed, and said pixel electrode is electrically connected to said stacked electrode layer in said non-formation region.
Claim 15
Dependent Claim
111 words
A liquid crystal display device according to any one of claims 10 to 14, wherein said data line includes a first data line electrically connected to said source of said thin film transistor via a first connection hole of said interlayer insulating film and a second data line electrically connected to the surface of said first data line to constitute a multiwiring structure, and said stacked electrode layer includes a first stacked electrode layer electrically connected to said drain of said thin film transistor via a second connection hole of said interlayer insulating film and a second stacked electrode layer electrically connected to the surface of said first stacked electrode layer.
Claim 16
Dependent Claim
44 words
A liquid crystal display device according to claim 15, wherein said first data line and said first stacked electrode layer are made of a same material, and also said second data line and said second stacked electrode layer are made of a same material.
Claim 17
Dependent Claim
82 words
A liquid crystal display device according to any one of claims 10 to 16, wherein a drive circuit formed on the same substrate, on which an active matrix having said first and second pixel regions is formed, has a multi-layer wiring structure in which wiring layer are electrically connected to said interlayer insulating film formed adjacent to said active matrix via an interlayer insulating film present in the same layer in which said interlayer insulating film formed adjacent to said active matrix.
Claim 18
Dependent Claim
62 words
A liquid crystal display device according to any one of claims 1 to 17, wherein said gate electrode and said gate line have intrinsic polycrystalline silicon layers or polycrystalline silicon layers containing phosphorus by 1 x 10²⁰/cm³ or less and silicide layer made of high melting point metal formed on the surface of said polycrystalline silicon layer and constituting said multi-wiring structure.
Claim 19
Dependent Claim
46 words
A liquid crystal display device according to any one of claims 1 to 18, wherein at least either said pixel electrode and said conductive and light shielding layer has the outer end adjacent to the forward gate line at a position above said forward gate line.
Claim 20
Dependent Claim
57 words
A method of manufacturing said liquid crystal display device according to claim 9, comprising a step of patterning a lower one of said pixel electrode and said conductive and light shielding layer in a manner that the outer end of an upper layer and a mask for use in patterning the upper layer are used as masks.
Claim 21
Dependent Claim
144 words
A method of manufacturing said liquid crystal display device according to claim 18 comprising: a step of forming a first polycrystalline silicon film to serve as a source and drain region and a channel region on the surface of a transparent substrate; a step of forming a gate electrode insulating film on the surface of said polycrystalline silicon film; a step of depositing a second polycrystalline silicon film below said gate electrode and said gate line; a step of dispersing phosphorus in said second polycrystalline silicon film at a temperature of 850°C or lower; a step of depositing a silicide layer of high melting point metal above said gate electrode and said gate line; and a step of simultaneously patterning said second polycrystalline silicon film and said silicide layer of said high melting point metal to form said gate electrode and said gate line.
References Cited (Backward Citations)
No citation records indexed.
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