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US4898798A
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Photosensitive member having a light receiving layer comprising a carbonic film for use in electrophotography
Assignee: Canon Inc
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Filing: 1987-09-25
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Granted: 1990-02-06
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Expires: 2007-09-25
Abstract
Abstract An improved photosensitive member for use in electrophotography which comprises a substrate and a light receiving layer having a charge carrier generation layer and a charge carrier transportation layer composed of a carbonic film the nucleus of which matrix being carbon atom, which contains 40 atomic % or less of hydrogen atom and which possesses an optical band gap of 1.5 eV or more and an electric conductivity of 10 -11 Ω -1 cm -1 or less. It is always and substantially stable regardless of the changes in use environments and it enables to make highly resolved images with a clear half-tone which are highly dense and quality at high speed.
Inventors
- 👤 Masao Sugata
- 👤 Tohru Den
- 👤 Susumu Ito
- 👤 Keiji Hirabayashi
- 👤 Keiko Ikoma
- 👤 Noriko Kurihara
- 👤 Kuniji Osabe
- 👤 Tatsuo Takeuchi
- 👤 Hiroshi Satomura
- 👤 Yoshihiro Oguchi
- 👤 Akio Maruyama
- 👤 Keishi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:59
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08285
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
200 words
A photosensitive member for use in electrophotography comprising a substrate and a divided-functional light receiving layer having a charge carrier transportation layer and a change carrier generation layer in this order from the side of said substrate, wherein said charge carrier transportation layer has a thickness of 1 to 100 μm and comprises a film containing (i) carbon atoms in an amount of at least 65 atomic percent, (ii) hydrogen atoms in an amount 30 atomic percent or less and (iii) at least one element selected from the group consisting of boron, aluminum, gallium, indium, thallium, nitrogen, phosphorus, arsenic, antimony and bismuth in an amount of 5 atomic ppm to 5 atomic percent; the matrix of said film being said carbon atoms; said film having a value of 0.18 to 5.9 for the ratio of I D /I G between the peak intensity (I D ) of 1333 cm -1 and the peak intensity (I G ) of 1850 cm -1 in Raman spectra; and wherein said film contains a diamond phase in volume ratio of 50 to 90 percent, a graphite phase in a volume ratio of 20 percent or less and an amorphous carbon phase for the balance.
Claim 2
Dependent Claim
200 words
A photosensitive member for use in electrophotography comprising a substrate and a divided-functional light receiving layer having a charge carrier transportation layer and a change carrier generation layer in this order from the side of said substrate, wherein said charge carrier transportation layer has a thickness of 1 to 100 μm and comprises a film containing (i) carbon atoms in an amount of at least 65 atomic percent, (ii) hydrogen atoms in an amount 30 atomic percent or less and (iii) at least one element selected from the group consisting of boron, aluminum, gallium, indium, thallium, nitrogen, phosphorus, arsenic, antimony and bismuth in an amount of 5 atomic ppm to 5 atomic percent; the matrix of said film being said carbon atoms; said film having a value of 0.18 to 5.9 for the ratio of I D /I G between the peak intensity (I D ) of 1333 cm -1 and the peak intensity (I G ) of 1850 cm -1 in Raman spectra; and wherein said film contains a diamond phase in volume ratio of 50 to 90 percent, a graphite phase in a volume ratio of 20 percent or less and an amorphous carbon phase for the balance.
Claim 3
Dependent Claim
31 words
A photosensitive member for use in electrophotography according to claim 1, wherein said value for the ratio of I D /I G is in the range of from 1.8 to 5.9.
Claim 4
Dependent Claim
37 words
A photosensitive member for use in electrophotography according to claim 1, wherein said film possesses an electric conductivity of 10 -11 Ω -1 cm -1 or less and an optical band gap of 1.5 eV or more.
Claim 5
Dependent Claim
27 words
A photosensitive member for use in electrophotography according to claim 3, wherein said film further possesses a gap state density of 5×10 17 cm -3 or less.
Claim 6
Dependent Claim
27 words
A photosensitive member for use in electrophotography according to claim 1, wherein said film further contains fluorine atoms in an amount of 15 atomic % or less.
Claim 7
Dependent Claim
31 words
A photosensitive member for use in electrophotography according to claim 1, wherein said film further contains at least one kind selected from the group consisting of nitrogen atoms and oxygen atoms.
Claim 8
Dependent Claim
39 words
A photosensitive member for use in electrophotography according to claim 1, wherein the charge carrier transportation layer possesses a light absorption coefficient of 10 4 cm -1 or less against light having an energy of 2.5 eV or less.
Claim 9
Dependent Claim
28 words
A photosensitive member for use in electrophotography according to claim 1, wherein the divided-functional light receiving layer additionally has a surface layer on the charge carrier generation layer.
Claim 10
Dependent Claim
34 words
A photosensitive member for use in electrophotography according to claim 8, wherein said surface layer comprises a film having a matrix of carbon atoms and an optical band gap of 2.0 eV or more.
Claim 11
Dependent Claim
213 words
A photosensitive member for use in electrophotography comprising a substrate ad a light receiving layer having a charge carrier generation layer and a charge carrier transportation layer in this order from the side of said substrate, wherein said charge carrier transportation layer has a thickness of 1 to 100 μm and comprises a film containing (i) carbon atoms in an amount of at least 65 atomic percent, (ii) hydrogen atoms in an amount of 30 atomic percent or less and (iii) at least one element selected from the group consisting of boron, aluminum, gallium, thallium, nitrogen, phosphorous, arsenic, antimony and bismuth in an amount of 5 atomic ppm to 5 atomic percent; the matrix of said film being said carbon atoms; said film having (iv) a value of 0.18 to 5.9 for the ratio of I D /I G between the peak intensity (I D ) of 1333 cm -1 and the peak intensity (I G ) of 1580 cm -1 in Raman spectra and possessing (v) a coefficient of kinetic friction of 0.5 or less, and wherein said film contains a diamond phase in a volume ratio to 50 to 90 percent; a graphite phase in a volume ratio of 20 percent or less and an amorphous carbon phase for the balance.
Claim 12
Dependent Claim
213 words
A photosensitive member for use in electrophotography comprising a substrate ad a light receiving layer having a charge carrier generation layer and a charge carrier transportation layer in this order from the side of said substrate, wherein said charge carrier transportation layer has a thickness of 1 to 100 μm and comprises a film containing (i) carbon atoms in an amount of at least 65 atomic percent, (ii) hydrogen atoms in an amount of 30 atomic percent or less and (iii) at least one element selected from the group consisting of boron, aluminum, gallium, thallium, nitrogen, phosphorous, arsenic, antimony and bismuth in an amount of 5 atomic ppm to 5 atomic percent; the matrix of said film being said carbon atoms; said film having (iv) a value of 0.18 to 5.9 for the ratio of I D /I G between the peak intensity (I D ) of 1333 cm -1 and the peak intensity (I G ) of 1580 cm -1 in Raman spectra and possessing (v) a coefficient of kinetic friction of 0.5 or less, and wherein said film contains a diamond phase in a volume ratio to 50 to 90 percent; a graphite phase in a volume ratio of 20 percent or less and an amorphous carbon phase for the balance.
Claim 13
Dependent Claim
31 words
A photosensitive member for use in electrophotography according to claim 10, wherein said value for the ratio of I D /I G is in the range of from 1.8 to 5.9.
Claim 14
Dependent Claim
35 words
A photosensitive member for use in electrophotography according to claim 10, wherein said film possesses an electric conductivity of 10 11 Ωcm -1 or less and an optical band gap of 1.5 eV or more.
Claim 15
Dependent Claim
27 words
A photosensitive member for use in electrophotography according to claim 12, wherein said film further possesses a gap state density of 5×10 17 cm -3 or less.
Claim 16
Dependent Claim
27 words
A photosensitive member for use in electrophotography according to claim 10, wherein said film further contains fluorine atoms in an amount of 15 atomic % or less.
Claim 17
Dependent Claim
31 words
A photosensitive member for use in electrophotography according to claim 10, wherein said film further contains at least one kind selected from the group consisting of nitrogen atoms and oxygen atoms.
Claim 18
Dependent Claim
39 words
A photosensitive member for use in electrophotography according to claim 10, wherein the charge carrier transportation layer possesses a light absorption coefficient of 10 4 cm -1 or less against light having an energy of 2.5 eV or less.
Claim 19
Dependent Claim
33 words
A photosensitive member for use in electrophotography according to claim 10, wherein the divided-functional light receiving layer additionally has a charge injection inhibition layer between the substrate and the charge carrier generation layer.
Claim 20
Dependent Claim
29 words
An electrophotographic process comprising: (a) charging the photosensitive member of claim 1; and (b) irrdiating said photosensitive member with an electromagnetic wave carrying information, thereby forming an electrostatic image.
Claim 21
Dependent Claim
29 words
An electrophotographic process comprising: (a) charging the photosensitive member of claim 10; and (b) irradiating said photosensitive member with an electromagnetic wave carrying information, thereby forming an electromagnetic image.
References Cited (Backward Citations)
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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) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
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