US5013624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glassy metal oxide layers for photoreceptor applications
Assignee: Xerox Corp
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Filing: 1989-12-15
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Granted: 1991-05-07
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Expires: 2009-12-15
Abstract
Abstract An electrophotographic imaging member has a metal oxide hole blocking layer in the form of a film of an inorganic glassy network. The metal oxide hole blocking layer may be bonded to a conductive layer of the imaging member.
Inventors
- 👤 Robert C.U. Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:12
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/144
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
20 words
An electrophotographic imaging member comprising a hole blocking layer, said hole blocking layer comprising a glassy network of metal oxide.
Claim 2
Dependent Claim
20 words
An electrophotographic imaging member comprising a hole blocking layer, said hole blocking layer comprising a glassy network of metal oxide.
Claim 3
Dependent Claim
55 words
The member of claim 1, wherein said glassy network of metal oxide is obtained by hydrolyzing a metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl having from 1 to 20 carbon atoms, benzyl or phenyl, and condensing said hydrolyzed metal alkoxide or aryloxide.
Claim 4
Dependent Claim
17 words
The member of claim 1, wherein said hole blocking layer is covalently bonded to an adjacent layer.
Claim 5
Dependent Claim
22 words
The member of claim 1, wherein said glassy network of metal oxide is covalently bonded to a metal in an adjacent layer.
Claim 6
Dependent Claim
31 words
The member of claim 1, wherein said metal is at least one metal selected from the group consisting of Si, Ti, Al, Cr, Sn, Fe, Mg, Mn, Zr, Ni, and Cu.
Claim 7
Dependent Claim
11 words
The member of claim 2, wherein said adjacent layer comprises Ti.
Claim 8
Dependent Claim
16 words
The member of claim 1, wherein said metal alkoxide of the formula M(OR) 4 is tetraethylorthosilicate.
Claim 9
Dependent Claim
21 words
The member of claim 1, wherein said hole blocking layer has a thickness of about 0.003 micrometer to about 0.5 micrometer.
Claim 10
Dependent Claim
42 words
An electrophotographic imaging member comprising a supporting substrate, a conductive ground plane, a hole blocking layer comprising a glassy network metal oxide film covalently bonded to the conductive ground plane, an adhesive interface layer, a photogenerating layer and a charge transport layer.
Claim 11
Dependent Claim
42 words
An electrophotographic imaging member comprising a supporting substrate, a conductive ground plane, a hole blocking layer comprising a glassy network metal oxide film covalently bonded to the conductive ground plane, an adhesive interface layer, a photogenerating layer and a charge transport layer.
Claim 12
Dependent Claim
23 words
The member of claim 9, further comprising an anticurl layer coated at a backside of the supporting substrate and opposite said other layers.
Claim 13
Dependent Claim
61 words
The member of claim 9, wherein said hole blocking layer is obtained by hydrolyzing a metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl having from 1 to 20 carbon atoms, benzyl or phenyl, and condensing said hydrolyzed metal alkoxide or aryloxide to obtain said glassy network metal oxide film.
Claim 14
Independent Claim
107 words
A method of covalently bonding adjacent layers in an electrophotographic imaging member, comprising: (a) hydrolyzing a solution containing a metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl having 1 to 20 carbon atoms, benzyl or phenyl, to form a solution containing a hydrolyzed metal species; (b) coating said solution containing a hydrolyzed metal species on a first layer comprising a material reactive with said hydrolyzed metal species; and (c) condensing and covalently bonding said hydrolyzed metal species with said reactive material of said first layer to form a second layer coated on said first layer.
Claim 15
Independent Claim
107 words
A method of covalently bonding adjacent layers in an electrophotographic imaging member, comprising: (a) hydrolyzing a solution containing a metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl having 1 to 20 carbon atoms, benzyl or phenyl, to form a solution containing a hydrolyzed metal species; (b) coating said solution containing a hydrolyzed metal species on a first layer comprising a material reactive with said hydrolyzed metal species; and (c) condensing and covalently bonding said hydrolyzed metal species with said reactive material of said first layer to form a second layer coated on said first layer.
Claim 16
Dependent Claim
15 words
The method of claim 12, wherein said condensing is carried out in an acid medium.
Claim 17
Dependent Claim
15 words
The method of claim 12, wherein said condensing is carried out in a basic medium.
Claim 18
Dependent Claim
12 words
The method of claim 12, wherein said reactive material is a metal.
Claim 19
Dependent Claim
18 words
The method of claim 12, further including the step of drying the covalently bonded layers at elevated temperatures.
Claim 20
Dependent Claim
18 words
The method of claim 12, wherein said solution containing said metal alkoxide or aryloxide is an aqueous/alcohol solution.
Claim 21
Dependent Claim
14 words
The method of claim 12, wherein said second layer is a hole blocking layer.
Claim 22
Dependent Claim
15 words
The method of claim 18, wherein said first layer is a conductive ground plane layer.
Claim 23
Dependent Claim
13 words
The method of claim 18, wherein said first layer is a substrate layer.
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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) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
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