EP0377320A2
Expired / Lapsed
EP
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Electric field light-emitting device
Assignee: Canon Inc
•
Filing: 1989-12-27
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Granted: —
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Expires: 2009-12-27
Abstract
Abstract An electric field effect light emitting device comprises a light emitting layer consisting of a diamond-like carbon film containing oxygen.
Inventors
- 👤 Yasushi Taniguchi
- 👤 Keiji Hirabayashi
- 👤 Noriko Kurihara
- 👤 Keiko Ikoma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 23:11
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/65; H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/18; H05B33/22; H05B33/26
Claims Analysis
Total Claims: 60
Claim 1
Independent Claim
20 words
An electric field effect light emitting device comprising a light emitting layer consisting of a diamond-like carbon film containing oxygen.
Claim 2
Dependent Claim
20 words
An electric field effect light emitting device comprising a light emitting layer consisting of a diamond-like carbon film containing oxygen.
Claim 3
Dependent Claim
16 words
A device according to claim 1, wherein the concentration of oxygen does not exceed 5 atom.%.
Claim 4
Dependent Claim
22 words
A device according to claim 1, wherein said light emitting layer further contains a small amount of an element other than oxygen.
Claim 5
Dependent Claim
18 words
A device according to claim 1, wherein said light emitting layer is substantially transparent to the visible light.
Claim 6
Dependent Claim
21 words
A device according to claim 1, wherein said light emitting layer has a resistivity equal to or larger than 10⁰ Ω·cm.
Claim 7
Dependent Claim
22 words
A device according to claim 1, wherein said light emitting layer has a Vickers hardness equal to or larger than 2,000 kg/mm².
Claim 8
Dependent Claim
27 words
A device according to claim 2, wherein said element other than oxygen is present in said light emitting layer in an amount from 0.1 to 3 wt.%.
Claim 9
Dependent Claim
34 words
A device according to claim 2, wherein said element other than oxygen is selected from a group consisting of B, Te, As, Au, Mg, P, Sb, Si, Ta, N, halides, sulfides and oxides thereof.
Claim 10
Dependent Claim
53 words
A device according to claim 2, wherein said element other than oxygen is selected from a group consisting of Tl, Ba, Li, Cd, Cs, In, Ra, S, Sr, Ti, Zn, Ca, Ce, Co, Cr, Fe, Ga, K, Mn, Nb, Os, Pb, Rb, Rh, Sc, Th, V, W, Y, halides, sulfides and oxides thereof.
Claim 11
Dependent Claim
39 words
A device according to claim 2, wherein said element other than oxygen is selected from a group consisting of Ag, Be, Bi, Cu, Ge, Hg, Pt, Re, Zr, Al, Ir, Ni, Ru, Sn, Tb, halides, sulfides and oxides thereof.
Claim 12
Dependent Claim
18 words
A device according to claim 5, wherein said resistivity is in a range from 10⁹ to 10¹³ Ω·cm.
Claim 13
Dependent Claim
17 words
A device according to claim 11, wherein said resistivity is equal to or higher than 10¹² Ω·cm.
Claim 14
Dependent Claim
51 words
An electric field effect light emitting device provided with a first conductive member, a second conductive member and a light emitting layer consisting of a thin film of monocrystalline diamond or polycrystalline diamond, comprising an insulating layer at least between said first or second conductive member and said light emitting layer.
Claim 15
Dependent Claim
51 words
An electric field effect light emitting device provided with a first conductive member, a second conductive member and a light emitting layer consisting of a thin film of monocrystalline diamond or polycrystalline diamond, comprising an insulating layer at least between said first or second conductive member and said light emitting layer.
Claim 16
Dependent Claim
22 words
A device according to claim 13, wherein said light emitting layer contains a small amount of an element constituting light emitting centers.
Claim 17
Dependent Claim
18 words
A device according to claim 13, wherein said light emitting layer is substantially transparent to the visible light.
Claim 18
Dependent Claim
38 words
A device according to claim 14, wherein said element constituting light emitting centers is present in said light emitting layer in a ratio of 5 x 10⁻² to 1 x 10⁻⁵ with respect to the carbon atoms thereof.
Claim 19
Dependent Claim
35 words
A device according to claim 14, wherein said element constituting light emitting centers is selected from a group consisting of B, Te, As, Au, Mg, P, Sb, Si, Ta, N, halides, sulfides and oxides thereof.
Claim 20
Dependent Claim
54 words
A device according to claim 14, wherein said element constituting light emitting centers is selected from a group consisting of Tl, Ba, Li, Cd, Cs, In, Ra, S, Sr, Ti, Zn, Ca, Ce, Co, Cr, Fe, Ga, K, Mn, Nb, Os, Pb, Rb, Rh, Sc, Th, V, W, Y, halides, sulfides and oxides thereof.
Claim 21
Dependent Claim
41 words
A device according to claim 14, wherein said element constituting light emitting centers is selected from a group consisting of Ag, Be, Bi, Cu, Ge, Hg, Pt, Re, Zr, Al, Ir, Ni, Ru, Sn, Tb, O, halides, sulfides, and oxides thereof.
Claim 22
Dependent Claim
18 words
A device according to claim 13, wherein said insulating layer has a thickness from 500 to 5,000 Å.
Claim 23
Dependent Claim
18 words
A device according to claim 13, wherein said conductive layers have a thickness from 500 to 1,500 Å.
Claim 24
Dependent Claim
16 words
A device according to claim 13, wherein said first conductive layer is a transparent conductive film.
Claim 25
Dependent Claim
16 words
A device according to claim 13, wherein said second conductive layer is composed of a metal.
Claim 26
Dependent Claim
24 words
A device according to claim 22, wherein said transparent conductive film is composed of a material selected from ITO, SnO₂, ZnO, SnO₂-Sb and Cd₂SnO₄.
Claim 27
Dependent Claim
21 words
A device according to claim 23, wherein said metal is selected from Al, Au, Ag, Pt, W, Cu, Ti and Ni.
Claim 28
Dependent Claim
34 words
A device according to claim 13, wherein said insulating layer is provided between said light emitting layer and said first conductive layer, and also between said light emitting layer and said second conductive layer.
Claim 29
Dependent Claim
36 words
A device according to claim 26, wherein said insulating layers provided between said light emitting layer and said first conductive layer and between said light emitting layer and said second conductive layer have mutually different thicknesses.
Claim 30
Dependent Claim
26 words
A device according to claim 13, wherein said insulating layer is composed of a material selected from TO, HfO₂, Si₃N₄, Al₂O₃, Ta₂O₅, PbTiO₃, BaTa₂O₆ and SrTiO₃.
Claim 31
Dependent Claim
18 words
A device according to claim 13, comprising a protective layer on at least one of said conductive layers.
Claim 32
Dependent Claim
17 words
A device according to claim 13, wherein said light emitting layer is selectively formed with regular patterns.
Claim 33
Dependent Claim
22 words
A device according to claim 30, wherein the (100) plane of the diamond light emitting layer is oriented parallel to the substrate.
Claim 34
Dependent Claim
24 words
A device according to claim 20, wherein the diamond light emitting layer has a light emitting area equal to or larger than 1 µm².
Claim 35
Dependent Claim
30 words
A device according to claim 13, wherein said light emitting layer is selectively formed with regular patterns, and either of said first and second conductive members is formed as stripes.
Claim 36
Dependent Claim
17 words
A device according to claim 30, wherein said light emitting layer is formed as a two-dimensional matrix.
Claim 37
Dependent Claim
17 words
A device according to claim 33, wherein said light emitting layer is formed as a two-dimensional matrix.
Claim 38
Dependent Claim
25 words
A device according to claim 13, wherein said insulating layer provided between said conductive member and said light emitting layer is composed of plural layers.
Claim 39
Dependent Claim
35 words
An electric field effect light emitting device provided with a first conductive member, a thin diamond film constituting a light emitting layer, and a second conductive member, wherein said diamond film has a flat surface.
Claim 40
Dependent Claim
35 words
An electric field effect light emitting device provided with a first conductive member, a thin diamond film constituting a light emitting layer, and a second conductive member, wherein said diamond film has a flat surface.
Claim 41
Dependent Claim
19 words
A device according to claim 37, wherein said surface has a surface coarseness not exceeding 500 Å in average.
Claim 42
Dependent Claim
19 words
A device according to claim 37, wherein said light emitting layer has a thickness from 0.5 to 5 µm.
Claim 43
Dependent Claim
19 words
A device according to claim 39, wherein said light emitting layer has a thickness from 0.7 to 3 µm.
Claim 44
Dependent Claim
19 words
A device according to claim 40, wherein said light emitting layer has a thickness from 1 to 2 µm.
Claim 45
Dependent Claim
18 words
A device according to claim 37, wherein said light emitting layer further contains atoms constituting light emitting centers.
Claim 46
Dependent Claim
22 words
A device according to claim 42, wherein said atoms constituting light emitting centers are uniformly distributed in a direction across said layer.
Claim 47
Dependent Claim
22 words
A device according to claim 42, wherein said atoms constituting light emitting centers are unevenly distributed in a direction across said layer.
Claim 48
Dependent Claim
23 words
A device according to claim 44, wherein said atoms constituting light emitting centers are more densely distributed at the side of conductive member.
Claim 49
Dependent Claim
36 words
A device according to claim 42, wherein said atoms constituting light emitting centers are selected from a group consisting of B, Te, As, Au, Ag, Mg, P, Sb, Si, Ta, N, halides, sulfides and oxides thereof.
Claim 50
Dependent Claim
54 words
A device according to claim 42, wherein said atoms constituting light emitting centers are selected from a group consisting of Tl, Ba, Li, Cd, Cs, In, Ra, S, Sr, Ti, Zn, Ca, Ce, Co, Cr, Fe, Ga, K, Mn, Nb, Os, Pb, Rb, Rh, Sc, Th, V, W, Y, halides, sulfides and oxides thereof.
Claim 51
Dependent Claim
41 words
A device according to claim 43, wherein said atoms constituting light emitting centers are selected from a group consisting of Ag, Be, Bi, Cu, Ge, Hg, Pt, Re, Zr, Al, Ir, Ni, Ru, Sn, T, O, halides, sulfides and oxides thereof.
Claim 52
Dependent Claim
16 words
A device according to claim 37, wherein said first conductive member is a transparent conductive film.
Claim 53
Dependent Claim
24 words
A device according to claim 49, wherein said transparent conductive film is composed of a material selected from ITO, SnO₂, ZnO, SnO₂-Sb and Cd₂SnO₄.
Claim 54
Dependent Claim
16 words
A device according to claim 37, wherein said second conductive member is composed of a metal.
Claim 55
Dependent Claim
21 words
A device according to claim 51, wherein said metal is selected from Al, Au, Ag, Pt, W, Cu, Ti and Ni.
Claim 56
Dependent Claim
25 words
A device according to claim 37, further comprising an insulating layer at least between said light emitting layer and said first or second conductive member.
Claim 57
Dependent Claim
25 words
A device according to claim 53, wherein said insulating layer is composed of a material selected from HfO₂, Si₃N₄, Al₂O₃, Ta₂O₅, PbTiO₃, BaTa₂O₆ and SrTiO₃.
Claim 58
Dependent Claim
40 words
A device according to claim 42, wherein the ratio (IE/IC) of number of said atoms constituting light emitting centers to the carbon atoms in said light emitting layer is within a range from 5 x 10⁻² to 1 x 10⁻⁵.
Claim 59
Dependent Claim
37 words
A device according to claim 37, wherein the ratio (IE/IC) of number of crystal defects of said light emitting layer to the carbon atoms thereof is within a range from 5 x 10⁻² to 1 x 10⁻⁵.
Claim 60
Dependent Claim
16 words
A device according to claim 37, wherein said light emitting layer is formed by gaseous growth.
References Cited (Backward Citations)
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