US5075738A
Expired / Lapsed
US
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Switching device and method of preparing it
Assignee: Canon Inc
•
Filing: 1989-03-28
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Granted: 1991-12-24
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Expires: 2009-03-28
Abstract
Abstract A switching device comprises a pair of electrodes, an organic insulating layer and an inorganic oxide layer which are held between the electrodes. The organic insulating layer is comprised of an organic compound having at least one π-electron level and the inorganic oxide layer is comprised of a metal oxide. Another switching device comprises a pair of electrodes, an organic insulating thin film provided between the electrodes and said organic insulating thin film in such a manner than an electrification region between the electrodes may be restricted.
Inventors
- 👤 Hiroshi Matsuda
- 👤 Kunihiro Sakai
- 👤 Hisaaki Kawade
- 👤 Yuko Morikawa
- 👤 Kiyoshi Takimoto
- 👤 Osamu Takamatsu
- 👤 Haruki Kawada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:50
CPC Classifications
B; B82; B82Y; B82Y10/00; H; H10; H10K; H10K10/00; H10K10/701; H10N; H10N70/00; H10N70/011; H10N70/021; H10N70/20; H10N70/801; H10N70/821; H10N70/826; H10N70/881
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
96 words
A switching device, comprising first and second electrodes, an organic insulating layer having a thickness of 3 Å to 1000 Å and an inorganic oxide layer having a thickness of at most 200 Å, wherein said organic insulating layer and said inorganic oxide layer are disposed adjacent to each other, wherein said first electrode is disposed adjacent to said organic insulating layer, wherein said second electrode is disposed adjacent to said inorganic oxide layer and wherein said first electrode comprises a material selected from the group consisting of a noble metal and an oxide conductive material.
Claim 2
Dependent Claim
96 words
A switching device, comprising first and second electrodes, an organic insulating layer having a thickness of 3 Å to 1000 Å and an inorganic oxide layer having a thickness of at most 200 Å, wherein said organic insulating layer and said inorganic oxide layer are disposed adjacent to each other, wherein said first electrode is disposed adjacent to said organic insulating layer, wherein said second electrode is disposed adjacent to said inorganic oxide layer and wherein said first electrode comprises a material selected from the group consisting of a noble metal and an oxide conductive material.
Claim 3
Dependent Claim
24 words
The switching device according to claim 1, wherein said organic insulating layer is comprised of an organic compound having at least one π-electron level.
Claim 4
Dependent Claim
27 words
The switching device according to claim 1, wherein said organic insulating layer has a thickness of not less than 50 Å and not more than 300 Å.
Claim 5
Dependent Claim
16 words
The switching device according to claim 1, wherein said organic insulating layer comprises a monomolecular film.
Claim 6
Dependent Claim
18 words
The switching device according to claim 1, wherein said inorganic oxide layer is comprised of a metal oxide.
Claim 7
Dependent Claim
20 words
The switching device according to claim 1, wherein said inorganic oxide layer has a thickness of at most 50 Å.
Claim 8
Dependent Claim
109 words
A switching device, comprising first and second electrodes, an organic insulating thin film having a step portion and an inorganic insulating thin film, said organic insulation thin film and said inorganic insulating thin film being provided between said first and second electrodes, said organic insulating thin film having a thickness of 20 Å to 1000 Å, and said inorganic insulating thin film being provided on said step portion of said organic insulating thin film, wherein said first electrode is disposed adjacent to said organic insulating thin film and wherein said first electrode comprises a material selected from the group consisting of a noble metal and an oxide conductive material.
Claim 9
Dependent Claim
109 words
A switching device, comprising first and second electrodes, an organic insulating thin film having a step portion and an inorganic insulating thin film, said organic insulation thin film and said inorganic insulating thin film being provided between said first and second electrodes, said organic insulating thin film having a thickness of 20 Å to 1000 Å, and said inorganic insulating thin film being provided on said step portion of said organic insulating thin film, wherein said first electrode is disposed adjacent to said organic insulating thin film and wherein said first electrode comprises a material selected from the group consisting of a noble metal and an oxide conductive material.
Claim 10
Dependent Claim
33 words
The switching device according to claim 7, wherein said organic insulating thin film comprises a polyimide obtained by cyclic polymerization of a polyamic acid, a polyamic acid salt or a polyamic acid ester.
Claim 11
Dependent Claim
23 words
The switching device according to claim 7, wherein said inorganic insulating thin film has a thickness ranging between 500 Å and 1 μm.
Claim 12
Dependent Claim
65 words
A switching device according to claim 2, wherein said organic compound is a material selected from the group of consisting of coloring materials having a porphirin structure, azulene dyes having a squarilium group and a croconic methine group as bonding chains, cyanine-analogus dyes formed by combining two nitrogen-containing heterocyclic rings, cyanine dyes, condensed polycyclic aromatics, derivatives of tetraquinodimethane, derivatives of tetrathiafulvalene and metal complex compounds.
Claim 13
Dependent Claim
25 words
A switching device according to claim 2, wherein said organic compound is a material selected from the group consisting of polyimide, polystyrene, polydiacetylene and polythiophene.
Claim 14
Dependent Claim
16 words
A switching device according to claim 4, wherein said organic insulating layer comprises a Langmuir-Blodgett film.
Claim 15
Dependent Claim
64 words
A switching device according to claim 5, wherein said inorganic oxide is a material selected from the group consisting of Al 2 O 3 , BaO, BeO, MgO, SiO 2 , CuO, PbO, Fe 2 O 3 , Cu 2 O, V 2 O 5 , Ta 2 O 5 , TiO 2 , WO 3 , Ag 2 O and PbTiO 3 .
Claim 16
Dependent Claim
35 words
A switching device according to claim 1 or 7, wherein said first electrode comprises a material selected from the group consisting of Au, Pt, Ag, Pd, Al, In, Sn, Pb, graphite, silicide and conductive oxides.
Claim 17
Dependent Claim
23 words
A switching device according to claim 7, wherein said inorganic insulating thin film has a thickness ranging between 1000 Å to 3000 Å.
Claim 18
Dependent Claim
17 words
A switching device according to claim 7, wherein said organic insulating thin film comprises a monomolecular film.
Claim 19
Dependent Claim
17 words
A switching device according to claim 16, wherein said organic insulating thin film comprises a Langmuir-Blodgett film.
Claim 20
Dependent Claim
17 words
A switching device according to claim 7, wherein said inorganic insulating thin film comprises an inorganic oxide.
Claim 21
Dependent Claim
65 words
A switching device according to claim 18, wherein said inorganic oxide comprises a material selected from the group of consisting of Al 2 O 3 , BaO, BeO, MgO, SiO 2 , CuO, PbO, Fe 2 O 3 , Cu 2 O, V 2 O 5 , Ta 2 O 5 , TiO 2 , WO 3 , Ag 2 O and PbTiO 3 .
Claim 22
Dependent Claim
20 words
The switching device according to claim 1, wherein said organic insulating layer comprises a built-up film having plural monomolecular films.
Claim 23
Dependent Claim
21 words
A switching device according to claim 7, wherein said organic insulating thin film comprises a built-up film having plural monomolecular films.
References Cited (Backward Citations)
US3519999A
Cited
US3719933A
Cited
US4534623A
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US4630081A
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JPS6242584A
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US4780790A
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US4929524A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
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