Patent EP0461302A2 successfully refreshed from Google Patents.
EP0461302A2
Expired / Lapsed
EP
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Image sensor or reading device containing a light source and a method for manufacturing the same
Assignee: Fujifilm Business Innovation Corp
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Filing: 1990-10-12
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Granted: —
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Expires: 2010-10-12
Abstract
Abstract An image reading device in which light receiving elements formed on a first substrate are disposed in opposition to light emitting elements formed on a second substrate with a transparent layer being interposed therebetween. The transparent layer is made of a material whose reflectivity is smaller than that of the second substrate. In another embodiment, gas layers are provided between the transparent layer and the light emitting elements and the gas therein has an index of refraction less than the second substrate. Light transmitting windows provided in an opaque electrode of the light emitting elements have peripheral portions where no light is emitted.
Inventors
- 👤 Masao Funada
- 👤 Norikazu Yamada
- 👤 Kazuhisa Ando
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 22:27
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/03; H04N1/031; H04N1/0315; H04N1/0317; H04N1/0313; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/18; H10F55/00; H10F55/20; H10F55/205; H10F55/25; H10F55/255
Claims Analysis
Total Claims: 73
Claim 1
Independent Claim
99 words
1 . An image reading device comprising: a first substrate having a first surface and a second surface opposite said first surface; a plurality of light receiving elements formed on said second surface of said first substrate; a second substrate having a reflectivity coefficient, a third surface, and a fourth surface opposite said third surface; a plurality of light emitting elements formed on said third surface of said second substrate; and a transparent layer interposed between said second surface and said third surface, said transparent layer having a reflectivity coefficient smaller than the reflectivity coefficient of said second substrate.
Claim 2
Dependent Claim
99 words
1 . An image reading device comprising: a first substrate having a first surface and a second surface opposite said first surface; a plurality of light receiving elements formed on said second surface of said first substrate; a second substrate having a reflectivity coefficient, a third surface, and a fourth surface opposite said third surface; a plurality of light emitting elements formed on said third surface of said second substrate; and a transparent layer interposed between said second surface and said third surface, said transparent layer having a reflectivity coefficient smaller than the reflectivity coefficient of said second substrate.
Claim 3
Dependent Claim
49 words
2 . An image reading device according to claim 1, wherein said fourth surface is adapted to support an original document such that the document is illuminated by light emitted from said light emitting elements and light reflected by said original surface is incident on said light receiving elements.
Claim 4
Dependent Claim
16 words
3 . An image reading device according to claim 2, wherein said second substrate is transparent.
Claim 5
Dependent Claim
21 words
4 . An image reading device according to claim 3, wherein said transparent second substrate is formed of glass or ceramic.
Claim 6
Dependent Claim
41 words
5 . An image reading device according to claim 1, wherein said light receiving elements comprise: an electrode pattern formed on said second surface; a photoconductive layer formed over said electrode pattern; and a common electrode formed over said photoconductive layer.
Claim 7
Dependent Claim
31 words
6 . An image reading device according to claim 5, wherein said electrode pattern includes a plurality of pixel portions and a lead portion connected with each of said pixel portions.
Claim 8
Dependent Claim
17 words
7 . An image reading device according to claim 5, wherein said photoconductive layer comprises amorphous silicon.
Claim 9
Dependent Claim
18 words
8 . An image reading device according to claim 5, wherein said electrode pattern is formed of chromium.
Claim 10
Dependent Claim
67 words
9 . An image reading device according to claim 1, wherein said light emitting elements comprise: a common electrode formed on said third surface of said second substrate; a first insulating layer formed on said common electrode: a light emitting layer formed on said first insulating layer; a second insulating layer formed on said light emitting layer; and a selection electrode formed on said second insulating layer.
Claim 11
Dependent Claim
29 words
10 . An image reading device according to claim 9, wherein said common electrode is formed of one of the materials of the group comprising ITO, In₂O₃, and SnO₂.
Claim 12
Dependent Claim
30 words
11 . An image reading device according to claim 10, wherein said first and second insulating layers are formed of a material of the group comprising Y₂O₃, Si₃N₄, and BaTiO₃.
Claim 13
Dependent Claim
17 words
12 . An image reading device according to claim 11, wherein said light emitting layer comprises ZnS:Mn.
Claim 14
Dependent Claim
18 words
13 . An image reading device according to claim 12, wherein said selection electrode comprises an opaque metal.
Claim 15
Dependent Claim
15 words
14 . An image reading device according to claim 13, wherein said metal is aluminum.
Claim 16
Dependent Claim
41 words
15 . An image reading device according to claim 1, wherein said second substrate comprises glass having a reflectivity coefficient of about 1.5 and said transparent layer comprises silicon resin or glass having a reflection coefficient of less than about 1.5.
Claim 17
Dependent Claim
109 words
16 . An method for making an image reading device comprising the steps of: providing a first substrate having a first surface and a second surface opposite said first surface; forming a plurality of light receiving elements on said second surface of said first substrate; providing a second substrate having a reflectivity coefficient, a third surface, and a fourth surface opposite said third surface; forming a plurality of light emitting elements on said third surface of said second substrate; and providing a transparent layer interposed between said second surface and said third surface, said transparent layer having a reflectivity coefficient smaller than the reflectivity coefficient of said second substrate.
Claim 18
Dependent Claim
109 words
16 . An method for making an image reading device comprising the steps of: providing a first substrate having a first surface and a second surface opposite said first surface; forming a plurality of light receiving elements on said second surface of said first substrate; providing a second substrate having a reflectivity coefficient, a third surface, and a fourth surface opposite said third surface; forming a plurality of light emitting elements on said third surface of said second substrate; and providing a transparent layer interposed between said second surface and said third surface, said transparent layer having a reflectivity coefficient smaller than the reflectivity coefficient of said second substrate.
Claim 19
Dependent Claim
47 words
17 . The method of claim 16, wherein said step of forming a plurality of light receiving elements comprises the substeps of: forming an electrode pattern on said second surface; forming a photoconductive layer over said electrode pattern; and forming a common electrode over said photoconductive layer.
Claim 20
Dependent Claim
39 words
18 . The method of claim 17, wherein said step of forming an electrode pattern comprises the substeps of: depositing chromium on said second surface; and patterning said deposited chromium by photolithography to form individual electrodes and electrode leads.
Claim 21
Dependent Claim
32 words
19 . The method of claim 18, wherein said step of forming a photoconductive layer comprises the substep of applying amorphous silicon over the individual electrodes to form a strip-like photoconductive layer.
Claim 22
Dependent Claim
28 words
20 . The method of claim 19, wherein said step of forming a common electrode comprises the substep of depositing indium oxide zinc over the strip-like photoconductive layer.
Claim 23
Dependent Claim
72 words
21 . The method of claim 16, wherein said step of forming a plurality of light emitting elements comprises the substeps of: forming a common electrode on said third surface of said second substrate; forming a first insulating layer on said common electrode: forming a light emitting layer on said first insulating layer; forming a second insulating layer on said light emitting layer; and forming a selection electrode on said second insulating.
Claim 24
Dependent Claim
38 words
22 . The method of claim 19, wherein said step of forming a common electrode on said third surface of said second substrate comprises the substep of sputtering any of ITO, In₂O₃, and SnO₂ on the third surface.
Claim 25
Dependent Claim
35 words
23 . The method of claim 22, wherein said step of forming a first insulating layer on said common electrode comprises the substep of depositing any of Y₂O₃, Si₃N₄, and BaTiO₃ on the common electrode.
Claim 26
Dependent Claim
32 words
24 . The method of claim 23, wherein said step of forming a light emitting layer on said first insulating layer comprises the substep of sputtering ZnS:Mn on the first insulating substrate.
Claim 27
Dependent Claim
37 words
25 . The method of claim 24, wherein said step of forming a second insulating layer on said light emitting layer comprises the substep of depositing any of Y₂O₃, Si₃N₄, and BaTiO₃ on the light emitting layer.
Claim 28
Dependent Claim
49 words
26 . The method of claim 25, wherein said step of forming the selection electrode on said light emitting layer comprises the substeps of: vapor depositing a metal layer on said second insulating electrode; and patterning said vapor deposited metal layer by photography to form light emitting windows therein.
Claim 29
Dependent Claim
112 words
27 . An image reading device comprising: a first substrate having a first surface and a second surface opposite said first surface; a plurality of light receiving elements formed on said second surface of said first substrate; a second substrate having a refractive index, a third surface, and a fourth surface opposite said third surface; a plurality of light emitting elements formed on said third surface of said second substrate; and a transparent layer interposed between said second surface and said third surface, said transparent layer having a plurality of depressions therein in a boundary surface with the plurality of light emitting elements and each of said depressions being filled with gas.
Claim 30
Dependent Claim
112 words
27 . An image reading device comprising: a first substrate having a first surface and a second surface opposite said first surface; a plurality of light receiving elements formed on said second surface of said first substrate; a second substrate having a refractive index, a third surface, and a fourth surface opposite said third surface; a plurality of light emitting elements formed on said third surface of said second substrate; and a transparent layer interposed between said second surface and said third surface, said transparent layer having a plurality of depressions therein in a boundary surface with the plurality of light emitting elements and each of said depressions being filled with gas.
Claim 31
Dependent Claim
26 words
28 . An image reading device according to claim 27, wherein each of said depressions is aligned with a different one of said light emitting elements.
Claim 32
Dependent Claim
25 words
29 . An image reading device according to claim 27, wherein said gas comprises one of the group comprising air, argon, nitrogen, helium, and neon.
Claim 33
Dependent Claim
33 words
30 . An image reading device according to claim 27, wherein said gas has a refractive index and said second substrate has a refractive index larger than the refractive index of said gas.
Claim 34
Dependent Claim
49 words
31 . An image reading device according to claim 27, wherein said fourth surface is adapted to support an original document such that the document is illuminated by light emitted from said light emitting elements and light reflected by said original surface is incident on said light receiving elements.
Claim 35
Dependent Claim
16 words
32 . An image reading device according to claim 31, wherein said second substrate is transparent.
Claim 36
Dependent Claim
21 words
33 . An image reading device according to claim 32, wherein said transparent second substrate is formed of glass or ceramic.
Claim 37
Dependent Claim
41 words
34 . An image reading device according to claim 27, wherein said light receiving elements comprise: an electrode pattern formed on said second surface; a photoconductive layer formed over said electrode pattern; and a common electrode formed over said photoconductive layer.
Claim 38
Dependent Claim
31 words
35 . An image reading device according to claim 34, wherein said electrode pattern includes a plurality of pixel portions and a lead portion connected with each of said pixel portions.
Claim 39
Dependent Claim
17 words
36 . An image reading device according to claim 34, wherein said photoconductive layer comprises amorphous silicon.
Claim 40
Dependent Claim
18 words
37 . An image reading device according to claim 34, wherein said electrode pattern is formed of chromium.
Claim 41
Dependent Claim
67 words
38 . An image reading device according to claim 27, wherein said light emitting elements comprise: a common electrode formed on said third surface of said second substrate; a first insulating layer formed on said common electrode: a light emitting layer formed on said first insulating layer; a second insulating layer formed on said light emitting layer; and a selection electrode formed on said second insulating layer.
Claim 42
Dependent Claim
29 words
39 . An image reading device according to claim 38, wherein said common electrode is formed of one of the materials of the group comprising ITO, In₂O₃, and SnO₂.
Claim 43
Dependent Claim
30 words
40 . An image reading device according to claim 39, wherein said first and second insulating layers are formed of a material of the group comprising Y₂O₃, Si₃N₄, and BaTiO₃.
Claim 44
Dependent Claim
17 words
41 . An image reading device according to claim 40, wherein said light emitting layer comprises ZnS:Mn.
Claim 45
Dependent Claim
18 words
42 . An image reading device according to claim 41, wherein said selection electrode comprises an opaque metal.
Claim 46
Dependent Claim
15 words
43 . An image reading device according to claim 42, wherein said metal is aluminum.
Claim 47
Dependent Claim
28 words
44 . An image reading device according to claim 27, wherein said transparent layer includes spherical spacers for maintaining a selected separation between said second and third surfaces.
Claim 48
Dependent Claim
104 words
45 . An image reading device comprising: a first substrate having a first surface and a second surface opposite said first surface; a plurality of light receiving elements formed on said second surface of said first substrate; a second substrate having a refractive index, a third surface, and a fourth surface opposite said third surface; a plurality of light emitting elements formed on said third surface of said second substrate; and a gas layer interposed between said second surface and said third surface, said gas layer being filled with a gas having a refractive index less than the refractive index of said second substrate.
Claim 49
Dependent Claim
104 words
45 . An image reading device comprising: a first substrate having a first surface and a second surface opposite said first surface; a plurality of light receiving elements formed on said second surface of said first substrate; a second substrate having a refractive index, a third surface, and a fourth surface opposite said third surface; a plurality of light emitting elements formed on said third surface of said second substrate; and a gas layer interposed between said second surface and said third surface, said gas layer being filled with a gas having a refractive index less than the refractive index of said second substrate.
Claim 50
Dependent Claim
25 words
46 . An image reading device according to claim 45, wherein said gas comprises one of the group comprising air, argon, nitrogen, helium, and neon.
Claim 51
Dependent Claim
117 words
47 . An method for making an image reading device comprising the steps of: providing a first substrate having a first surface and a second surface opposite said first surface; forming a plurality of light receiving elements on said second surface of said first substrate; providing a second substrate having an index of refraction , a third surface, and a fourth surface opposite said third surface; forming a plurality of light emitting elements on said third surface of said second substrate; and providing a gas layer between said second surface and said third surface, said gas layer being filled with a gas having an index of refraction smaller than the index of refraction of said second substrate.
Claim 52
Dependent Claim
117 words
47 . An method for making an image reading device comprising the steps of: providing a first substrate having a first surface and a second surface opposite said first surface; forming a plurality of light receiving elements on said second surface of said first substrate; providing a second substrate having an index of refraction , a third surface, and a fourth surface opposite said third surface; forming a plurality of light emitting elements on said third surface of said second substrate; and providing a gas layer between said second surface and said third surface, said gas layer being filled with a gas having an index of refraction smaller than the index of refraction of said second substrate.
Claim 53
Dependent Claim
150 words
48 . An method for making an image reading device comprising the steps of: providing a first substrate having a first surface and a second surface opposite said first surface; forming a plurality of light receiving elements on said second surface of said first substrate; providing a second substrate having an index of refraction, a third surface, and a fourth surface opposite said third surface; forming a plurality of light emitting elements on said third surface of said second substrate; forming a transparent layer interposed between said second surface and said third surface; forming a plurality of depressions in a surface of said transparent layer bounding said the plurality of light emitting elements; and filling each of said depressions with a gas having an index of refraction less than the index of refraction of said second substrate to form corresponding gas layers between said third surface and said transparent layer.
Claim 54
Dependent Claim
150 words
48 . An method for making an image reading device comprising the steps of: providing a first substrate having a first surface and a second surface opposite said first surface; forming a plurality of light receiving elements on said second surface of said first substrate; providing a second substrate having an index of refraction, a third surface, and a fourth surface opposite said third surface; forming a plurality of light emitting elements on said third surface of said second substrate; forming a transparent layer interposed between said second surface and said third surface; forming a plurality of depressions in a surface of said transparent layer bounding said the plurality of light emitting elements; and filling each of said depressions with a gas having an index of refraction less than the index of refraction of said second substrate to form corresponding gas layers between said third surface and said transparent layer.
Claim 55
Dependent Claim
69 words
49 . The method for making an image reading device according to claim 48, wherein said step of forming light emitting elements comprises the substeps of forming successively a transparent electrode, a dielectric layer, a light emitting layer, a dielectric layer, and a metal electrode layer on said third surface, and forming a plurality of light incident windows in said metal electrode layer to provide said light emitting elements.
Claim 56
Dependent Claim
96 words
50 . The method for making an image reading device according to claim 49, wherein said steps of forming said transparent layer and said plurality of depressions in a surface of said transparent layer bounding said the plurality of light emitting elements comprises the substep of coating said light emitting elements and said light receiving elements with a common coat of adhesive to bond said light receiving elements and said light emitting elements together so that light incident windows of said light receiving elements respectively align with said light incident windows of said light emitting elements.
Claim 57
Dependent Claim
29 words
51 . The method for making an image reading device according to claim 50, further including the step of forming gas layers in said depressions in said transparent layer.
Claim 58
Dependent Claim
162 words
51 . An image reading device comprising: a first substrate having a first surface and a second surface opposite said first surface; a plurality of light receiving elements formed on said second surface of said first substrate; a second substrate having a refractive index, a third surface, and a fourth surface opposite said third surface; a plurality of light emitting elements formed on said third surface of said second substrate, said fourth surface being adapted to support an original document such that the document is illuminated by light emitted from said light emitting elements and light reflected by said original surface is incident on said light receiving elements, each of said light emitting elements including a light transmissible window for guiding the reflected light to said light receiving elements, and each of said light emitting elements including a non-light emitting portion along the periphery of said light transmissible window; and a transparent layer interposed between said second surface and said third surface.
Claim 59
Dependent Claim
162 words
51 . An image reading device comprising: a first substrate having a first surface and a second surface opposite said first surface; a plurality of light receiving elements formed on said second surface of said first substrate; a second substrate having a refractive index, a third surface, and a fourth surface opposite said third surface; a plurality of light emitting elements formed on said third surface of said second substrate, said fourth surface being adapted to support an original document such that the document is illuminated by light emitted from said light emitting elements and light reflected by said original surface is incident on said light receiving elements, each of said light emitting elements including a light transmissible window for guiding the reflected light to said light receiving elements, and each of said light emitting elements including a non-light emitting portion along the periphery of said light transmissible window; and a transparent layer interposed between said second surface and said third surface.
Claim 60
Dependent Claim
59 words
52 . An image reading device according to claim 51, wherein each of said light emitting elements includes an opaque electrode and a common electrode, and wherein each of said non-lught emitting portions is defined by a cut out portion of said common electrode that is peripheral to said light transmissible window of each of said light emitting elements.
Claim 61
Dependent Claim
49 words
53 . An image reading device according to claim 51, wherein said fourth surface is adapted to support an original document such that the document is illuminated by light emitted from said light emitting elements and light reflected by said original surface is incident on said light receiving elements.
Claim 62
Dependent Claim
16 words
54 . An image reading device according to claim 53, wherein said second substrate is transparent.
Claim 63
Dependent Claim
21 words
55 . An image reading device according to claim 54, wherein said transparent second substrate is formed of glass or ceramic.
Claim 64
Dependent Claim
41 words
56 . An image reading device according to claim 54, wherein said light receiving elements comprise: an electrode pattern formed on said second surface; a photoconductive layer formed over said electrode pattern; and a common electrode formed over said photoconductive layer.
Claim 65
Dependent Claim
31 words
57 . An image reading device according to claim 56, wherein said electrode pattern includes a plurality of pixel portions and a lead portion connected with each of said pixel portions.
Claim 66
Dependent Claim
17 words
58 . An image reading device according to claim 56, wherein said photoconductive layer comprises amorphous silicon.
Claim 67
Dependent Claim
18 words
59 . An image reading device according to claim 56, wherein said electrode pattern is formed of chromium.
Claim 68
Dependent Claim
67 words
60 . An image reading device according to claim 51, wherein said light emitting elements comprise: a common electrode formed on said third surface of said second substrate; a first insulating layer formed on said common electrode: a light emitting layer formed on said first insulating layer; a second insulating layer formed on said light emitting layer; and a selection electrode formed on said second insulating layer.
Claim 69
Dependent Claim
29 words
61 . An image reading device according to claim 60, wherein said common electrode is formed of one of the materials of the group comprising ITO, In₂O₃, and SnO₂.
Claim 70
Dependent Claim
30 words
62 . An image reading device according to claim 61, wherein said first and second insulating layers are formed of a material of the group comprising Y₂O₃, Si₃N₄, and BaTiO₃.
Claim 71
Dependent Claim
17 words
63 . An image reading device according to claim 62, wherein said light emitting layer comprises ZnS:Mn.
Claim 72
Dependent Claim
18 words
64 . An image reading device according to claim 63, wherein said selection electrode comprises an opaque metal.
Claim 73
Dependent Claim
15 words
65 . An image reading device according to claim 64, wherein said metal is aluminum.
References Cited (Backward Citations)
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