Patent US5139906A successfully refreshed from Google Patents.
US5139906A
Expired / Lapsed
US
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Photosensitive medium with a protective layer of amorphous hydrocarbon having an absorption coefficient greater than 10,000 cm-1
Assignee: Minolta Co Ltd
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Filing: 1990-11-29
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Granted: 1992-08-18
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Expires: 2010-11-29
Abstract
Abstract A photosensitive medium which comprises an electroconductive substrate, an organic photosensitive layer formed on the substrate and a surface protective layer formed on the photosensitive layer and including amorphous hydrocarbon. The surface protective layer has a first region overlaying the photosensitive layer and a second region overlaying the first region. The second region of the surface protective layer includes amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is greater than 10,000 cm -1 , and the first region of the surface protective layer includes amorphous hydrocarbon having a light absorption coefficient which is relatively smaller than that of the second region of the surface protective layer.
Inventors
- 👤 Isao Doi
- 👤 Izumi Osawa
- 👤 Shuji Iino
- 👤 Kenji Masaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:31
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14704
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
113 words
A photosensitive medium which comprises: an electroconductive substrate; an organic photosensitive layer formed on the substrate; and a surface protective layer formed on the photosensitive layer and including amorphous hydrocarbon, said surface protective layer including a first region overlaying the photosensitive layer and a second region overlaying the first region, said second region including amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is greater than 10,000 cm -1 , said first region including amorphous hydrocarbon having a light absorption coefficient which is relatively smaller than that of the second region and said second region having a thickness which is relatively greater than that of the first region.
Claim 2
Dependent Claim
113 words
A photosensitive medium which comprises: an electroconductive substrate; an organic photosensitive layer formed on the substrate; and a surface protective layer formed on the photosensitive layer and including amorphous hydrocarbon, said surface protective layer including a first region overlaying the photosensitive layer and a second region overlaying the first region, said second region including amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is greater than 10,000 cm -1 , said first region including amorphous hydrocarbon having a light absorption coefficient which is relatively smaller than that of the second region and said second region having a thickness which is relatively greater than that of the first region.
Claim 3
Dependent Claim
23 words
The photosensitive medium as claimed in claim 1, wherein said organic photosensitive layer comprises a charge generating layer and a charge transporting layer.
Claim 4
Dependent Claim
34 words
The photosensitive medium as claimed in claim 1, wherein said second region including amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is greater than 20,000 cm -1 .
Claim 5
Dependent Claim
34 words
The photosensitive medium as claimed in claim 3, wherein said second region including amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is greater than 25,000 cm -1 .
Claim 6
Dependent Claim
28 words
The photosensitive medium as claimed in claim 1, wherein said first region includes amorphous hydrocarbon having a light absorption coefficient which is smaller than 10,000 cm -1 .
Claim 7
Dependent Claim
34 words
The photosensitive medium as claimed in claim 5, wherein said first region includes amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is smaller than 9,000 cm -1 .
Claim 8
Dependent Claim
34 words
The photosensitive medium as claimed in claim 6, wherein said first region includes amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is smaller than 6,000 cm -1 .
Claim 9
Dependent Claim
23 words
The photosensitive medium as claimed in claim 1, wherein said first region has a thickness within the range of 0.006 to 0.5 μm.
Claim 10
Dependent Claim
23 words
The photosensitive medium as claimed in claim 8, wherein said first region has a thickness within the range of 0.01 to 0.2 μm.
Claim 11
Dependent Claim
23 words
The photosensitive medium as claimed in claim 1, wherein said second region has a thickness within the range of 0.01 to 5 μm.
Claim 12
Dependent Claim
23 words
The photosensitive medium as claimed in claim 10, wherein said second region has a thickness within the range of 0.04 to 1 μm.
Claim 13
Dependent Claim
24 words
The photosensitive medium as claimed in claim 1, wherein said surface protective layer has a thickness within the range of 002 to 5 μm.
Claim 14
Dependent Claim
65 words
The photosensitive medium as claimed in claim 1, wherein the absorbent coefficient α 1 of the first region at the wavelength of 450 nm, the absorbent coefficient α 2 of the second region at the wavelength of 450 nm, the thickness D 1 of the first region and the thickness D 2 of the second region have the following relationship: α.sub.1 ×D.sub.1 +α.sub.2 ×D.sub.2 ≦0.69
Claim 15
Dependent Claim
66 words
The photosensitive medium as claimed in claim 13, wherein the absorbent coefficient α 1 of the first region at the wavelength of 450 nm, the absorbent coefficient α 2 of the second region at the wavelength of 450 nm, the thickness of D 1 of the first region and the thickness D 2 of the second region have the following relationship: α.sub.1 ×D.sub.1 +α.sub.2 ×D.sub.2 ≦0.51
Claim 16
Dependent Claim
113 words
A photosensitive medium which comprises: an electroconductive substrate; a photosensitive layer formed on the substrate; and a surface protective layer formed on the photosensitive layer and including amorphous hydrocarbon, said surface protective layer including a first region overlaying the photosensitive layer and a second region overlaying the first region, said second region including amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is greater than a 10,000 cm -1 , said first region including amorphous hydrocarbon having a light absorption coefficient which is relatively smaller than that of the second region and said second region having a thickness which is relatively greater than that of the first region.
Claim 17
Dependent Claim
113 words
A photosensitive medium which comprises: an electroconductive substrate; a photosensitive layer formed on the substrate; and a surface protective layer formed on the photosensitive layer and including amorphous hydrocarbon, said surface protective layer including a first region overlaying the photosensitive layer and a second region overlaying the first region, said second region including amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is greater than a 10,000 cm -1 , said first region including amorphous hydrocarbon having a light absorption coefficient which is relatively smaller than that of the second region and said second region having a thickness which is relatively greater than that of the first region.
Claim 18
Dependent Claim
34 words
The photosensitive medium as claimed in claim 15, wherein said second region including amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is greater than 20,000 cm -1 .
Claim 19
Dependent Claim
28 words
The photosensitive medium as claimed in claim 15, wherein said first region including amorphous hydrocarbon having a light absorption coefficient which is smaller than 10,000 cm -1 .
Claim 20
Dependent Claim
33 words
The photosensitive medium as claimed in claim 17, wherein said region including amorphous hydrocarbon having a light absorption coefficient at a wavelength of 450 nm which is smaller than 9,000 cm -1 .
Claim 21
Dependent Claim
23 words
The photosensitive medium as claimed in claim 15, wherein said first region has a thickness within the range of 0.006 to 0.5 μm.
Claim 22
Dependent Claim
23 words
The photosensitive medium as claimed in claim 15, wherein said second region has a thickness within the range of 0.01 to 5 μm.
Claim 23
Dependent Claim
18 words
The photosensitive medium as claimed in claim 15, wherein said photosensitive layer includes a selenium type photoconductive material.
Claim 24
Dependent Claim
15 words
The photosensitive medium as claimed in claim 15, wherein said photosensitive layer includes amorphous silicon.
Claim 25
Dependent Claim
106 words
A photosensitive medium which comprises: an electroconductive substrate; a photosensitive layer formed on the substrate; and a surface protective layer formed on the photosensitive layer and including a film of amorphous hydrocarbon, said surface protective layer having a light absorption coefficient at a wavelength of 450 nm which is maximum at an outermost surface region thereof and minimum at a portion thereof adjacent the photosensitive layer said surface protective layer having a region in which a light absorption coefficient at a wavelength of 450 nm is greater than 10,000 cm -1 , said region occupying a thickness of more than half of said surface protective layer.
Claim 26
Dependent Claim
106 words
A photosensitive medium which comprises: an electroconductive substrate; a photosensitive layer formed on the substrate; and a surface protective layer formed on the photosensitive layer and including a film of amorphous hydrocarbon, said surface protective layer having a light absorption coefficient at a wavelength of 450 nm which is maximum at an outermost surface region thereof and minimum at a portion thereof adjacent the photosensitive layer said surface protective layer having a region in which a light absorption coefficient at a wavelength of 450 nm is greater than 10,000 cm -1 , said region occupying a thickness of more than half of said surface protective layer.
Claim 27
Dependent Claim
25 words
The photosensitive medium as claimed in claim 23, wherein said light absorption coefficient at the outermost surface region is greater than 10,000 cm -1 .
Claim 28
Dependent Claim
24 words
The photosensitive medium as claimed in claim 23, wherein said surface protective layer has a thickness within the range of 0.02 to 5 μm.
Claim 29
Dependent Claim
16 words
The photosensitive medium as claimed in claim 23, wherein said photosensitive layer includes organic photoconductive material.
Claim 30
Dependent Claim
18 words
The photosensitive medium as claimed in claim 23, wherein said photosensitive layer includes a selenium type photoconductive material.
Claim 31
Dependent Claim
15 words
The photosensitive medium as claimed in claim 23, wherein said photosensitive layer includes amorphous silicon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |