With Plural Charge Generation Layers Patents (Class 430/57.2)
  • Patent number: 9589788
    Abstract: Provided are a polymer for an underlayer film, used in semiconductor and display manufacturing processes, an underlayer film composition for semiconductor and display manufacturing processes, containing the same, and a method for forming an underlayer film for semiconductor and display manufacturing processes using the underlayer film composition. The polymer according to the present invention is a polymer including a repeating unit represented by the following Chemical Formula 1: in Chemical Formula 1, Ar, R1 to R6, L, and R? and R? are the same as those in the detailed description of the present invention.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: March 7, 2017
    Assignees: SK Innovation Co., Ltd., SK Global Chemical Co., Ltd.
    Inventors: Min Ho Jung, Jeong Eop Choi, Hye Ryoung Lee
  • Publication number: 20150093696
    Abstract: An electrophotographic photosensitive member includes a photosensitive layer that contains a charge generating material, a hole transport material, a binder resin, and a plasticizer. The hole transport material contains a triarylamine derivative represented by General Formula (1) below. The plasticizer contains at least one of a compound represented by General Formula (2a) and a compound represented by General Formula (2b) below.
    Type: Application
    Filed: September 25, 2014
    Publication date: April 2, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Jun AZUMA, Hideki OKADA
  • Patent number: 8563204
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a hydroxygallium phthalocyanine, a hydroxyaluminum phthalocyanine, a polymeric binder, and a silanol.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: October 22, 2013
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 8173337
    Abstract: Exemplary embodiments provide material compositions useful for electrophotographic devices and processes. The material composition can include a plurality of graphene-containing particles dispersed or distributed in a polymer matrix. Such material composition can be used for electrophotographic members and devices including, but not limited to, a fuser member, a fixing member, a pressure roller, and/or a release donor member. In one embodiment, a material composition dispersion can be applied on a substrate in electrophotography to form a functional member layer to control, e.g., to improve, at least one of thermal, mechanical and/or electrical properties.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: May 8, 2012
    Assignee: Xerox Corporation
    Inventors: Matthew M. Kelly, David J. Gervasi, Santokh S. Badesha
  • Patent number: 8129082
    Abstract: A photoreceptor includes a conductive support body, an intermediate layer, and a photosensitive layer. The intermediate layer is made of gallium nitride (GaN) crystals having electron affinity greater than that of the photosensitive layer and formed between and in contact with the conductive support body and the photosensitive layer. The photosensitive layer is composed of either a single layer type photosensitive layer or a laminated type photosensitive layer.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: March 6, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Seiji Sarayama, Tetsuya Toshine
  • Publication number: 20110269062
    Abstract: A photoconductor that includes, for example, a supporting substrate, an undercoat layer thereover wherein the undercoat layer contains a metal oxide, a phenolic resin, and a phosphate; a photogenerating layer; and at least one charge transport layer.
    Type: Application
    Filed: April 28, 2010
    Publication date: November 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Jin Wu, Nancy L. Belknap, Helen R. Cherniack, Marc J. Livecchi
  • Patent number: 7846635
    Abstract: An image forming apparatus including an image bearing member for bearing a latent electrostatic image including a substrate, an intermediate layer containing a metal oxide and a photosensitive layer containing a charge transport layer and a charge generating layer containing an organic charge generating material, a charging device for charging the image bearing member, a writing device for writing the latent electrostatic image on the image bearing member by irradiating the image bearing member with light having a wavelength shorter than 450 nm which the metal oxide absorbs so that carriers can be generated, a developing device for developing the latent electrostatic image with a toner to form a visualized image, a transfer device for transferring the visualized image to a recording medium, a fixing device for fixing the transferred image on the recording image, and a discharging device for optically discharging residual charges on the image bearing member.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: December 7, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Tatsuya Niimi
  • Patent number: 7794905
    Abstract: A photoreceptor device having at least one layer that is a self-assembled patterned binder layer, which may include at least one functional material.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: September 14, 2010
    Assignee: Xerox Corporation
    Inventors: Kathy L. De Jong, Hany Aziz
  • Patent number: 7670733
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a Type V hydroxygallium phthalocyanine having incorporated therein a silanol.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: March 2, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Francisco J. Lopez, Linda L. Ferrarese, Liang-Bih Lin
  • Publication number: 20090208856
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, a charge transport layer, and a top overcoating layer in contact with and contiguous to the charge transport layer.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 20, 2009
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, John F. Yanus, Kenny-Tuan Dinh, Daniel V. Levy
  • Publication number: 20090075190
    Abstract: The presently disclosed embodiments are directed to charge transport layers useful in electrostatography. More particularly, the embodiments pertain to an improved imaging member having a dual charge generation layer comprising a top layer and a bottom layer, wherein the bottom layer comprises a blend of phthalocyanine pigments having different sensitivities and morphologies.
    Type: Application
    Filed: September 14, 2007
    Publication date: March 19, 2009
    Applicant: XEROX CORPORATION
    Inventors: Liang-Bih Lin, Daniel V. Levy, Markus Silvestri
  • Publication number: 20080274419
    Abstract: A photoconductor containing a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a photogenerating pigment or pigments, and a bis(pyridyl)alkylene.
    Type: Application
    Filed: May 4, 2007
    Publication date: November 6, 2008
    Inventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Sherri A. Colon
  • Publication number: 20080274418
    Abstract: A photoconductor containing a supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, and wherein the charge transport layer contains a charge blocking agent, such as a benzoimidazole.
    Type: Application
    Filed: May 4, 2007
    Publication date: November 6, 2008
    Inventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Marc J. Livecchi
  • Publication number: 20080268356
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a Type V hydroxygallium phthalocyanine having incorporated therein a silanol.
    Type: Application
    Filed: April 27, 2007
    Publication date: October 30, 2008
    Inventors: Jin Wu, Francisco J. Lopez, Linda L. Ferrarese, Liang-Bih Lin
  • Publication number: 20080233500
    Abstract: A photoreceptor device having at least one layer that is a self-assembled patterned binder layer, which may include at least one functional material.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 25, 2008
    Applicant: XEROX CORPORATION
    Inventors: Kathy L. DE JONG, Hany AZIZ
  • Publication number: 20080199793
    Abstract: An electrophotographic photoreceptor is provided including an undercoat layer and a photosensitive layer that are sequentially formed on an electrically conductive substrate, wherein the undercoat layer includes a silane compound represented by Formula 1, a metal oxide, and a binder resin, and an electrophotographic imaging apparatus employing the electrophotographic photoreceptor. where R1 to R are each independently a C1-C9 alkyl group, a C1-C9 alkoxy group, a phenyl group, or a phenoxy group. The electrophotographic photoreceptor has excellent electrical properties such as low residual potential and high sensitivity and excellent image quality and stability.
    Type: Application
    Filed: December 20, 2007
    Publication date: August 21, 2008
    Inventor: An-kee Lim
  • Publication number: 20080102388
    Abstract: A photoreceptor with a substrate, a charge generating layer, a charge transport layer including N,N,N?N?-tetra(4-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, having a purity of from about 95 percent to about 100 percent, and a protective overcoating layer, optionally including a hole transport material other than N,N,N?N?-tetra(4-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, that will discharge form about 85% to about 100% of its surface potential in from 0 to about 40 milliseconds upon being subjected to xerographic charging and exposure to radiant energy of from about 1 erg/cm2 to about 5 ergs/cm2.
    Type: Application
    Filed: May 31, 2007
    Publication date: May 1, 2008
    Applicant: XEROX CORPORATION
    Inventors: Hany Aziz, Gregory McGuire, Jennifer A. Coggan, Johann Junginger, Kathy L. De Jong, Ah-Mee Hor, Nan-Xing HU
  • Publication number: 20080076048
    Abstract: A method for producing a photoconductive switching element for switching a functional element to be driven by an AC field or a DC field, in which the photoconductive switching element comprises an electrode layer, a lower charge generation layer, a charge transport layer and an upper charge generation layer laminated in that order on a substrate, which comprises forming at least one layer to be laminated above the electrode layer by the use of a solvent system that comprises a solvent capable of swelling or dissolving the layer just below the layer to be laminated.
    Type: Application
    Filed: September 20, 2007
    Publication date: March 27, 2008
    Inventors: Hiroshi Arakatsu, Takehito Hikichi
  • Patent number: 7206115
    Abstract: The invention provides an optical switching element and a device, an optically addressed type display medium and a display each including such an optical switching element. The optical switching element comprising an optical switching layer including lower and upper charge generating layers and a charge transporting layer sandwiched therebetween, wherein the optical switching element has at least one of the following characteristics. (1) In the charge transporting layer, a charge transporting material to binder polymer ratio calculated according to the formula: [charge transporting material/(charge transporting material+binder polymer)]×100 (% by weight) is 50% by weight or more; (2) a polymer compound is used as the charge transporting material; and (3) the charge generating layer on the light incident side (the lower charge generating layer) has a lower light absorptance than that of the other charge generating layer (the upper charge generating layer).
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: April 17, 2007
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takehito Hikichi, Hideo Kobayashi
  • Patent number: 7183026
    Abstract: This invention relates to an improved organophotoreceptor that comprises an electrically conductive substrate having at least a surface; an inner photoconductive layer adjacent the surface of the electrically conductive substrate; and an outer photoconductive layer adjacent the inner photoconductive layer. In some embodiments, the inner photoconductive layer comprises a first binder in an amount not more than 45% by weight of the inner photoconductive layer, a first charge generating compound, and a charge transport compound, and the outer photoconductive layer comprises a second binder in an amount not less than 45% by weight of the outer photoconductive layer and a second charge generating compound. The inner photoconductive layer and the outer photoconductive layer can be discrete layers or sections of a gradient layer.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: February 27, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jiayi Zhu, Ronald J. Moudry
  • Patent number: 7070893
    Abstract: An electrographic or electrostatographic imaging member comprises a supporting substrate, an undercoating layer, a charge generating layer, and a charge transport layer. Thick undercoating layers were prepared with a charge erase enabler by doping an undercoating layer with a charge generating pigment that is strongly absorbing at typical erase lamp light. Doped thick undercoating layers demonstrate good electrical properties with an erase energy reduction of at least 50 V. A process for fabricating an imaging member and an apparatus comprising such an member are also disclosed.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: July 4, 2006
    Assignee: Xerox Corporation
    Inventors: John S. Chambers, Liang-Bih Lin, Jin Wu, Jennifer Y. Hwang, Linda L. Ferrarese, Francisco López
  • Patent number: 7060404
    Abstract: A photoreceptor including an electroconductive substrate; and a photosensitive layer located overlying the electroconductive substrate and comprising a charge generation material, a charge transport material and an inorganic filler, wherein the content of the inorganic filler at a surface side of the photosensitive layer is greater than that at a bottom side of the photosensitive layer near the electroconductive substrate, and wherein an outermost layer of the photoreceptor has a water vapor permeability not greater than 50 g·m?2·24 h?1.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: June 13, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Kami, Tatsuya Niimi, Akihiko Matsuyama, Eiji Kurimoto, Nozomu Tamoto
  • Patent number: 6998209
    Abstract: An electrophotographic photoreceptor including an electroconductive substrate, a charge generation layer overlying the electroconductive substrate to generate a first charge to form an electrostatic latent image when exposed to a first light, and a charge generation and transport layer overlying the charge generation layer to generate a second charge when exposed to second light and to transport the first and second charges to a surface of the photoreceptor.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: February 14, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Ikuno, Takeo Tsukamoto
  • Publication number: 20040063011
    Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, a charge transport component, an electron transport component, and a polymer binder, and wherein the photogenerating component is a pigment.
    Type: Application
    Filed: September 24, 2002
    Publication date: April 1, 2004
    Applicant: Xerox Corporation
    Inventors: Liang-Bih Lin, Merlin E. Scharfe, Harold F. Hammond, Cindy C. Chen, Richard H. Nealey, Andronique Ioannidis, Andrew R. Melnyk, Kenny-Tuan T. Dinh
  • Publication number: 20040043313
    Abstract: This invention relates to an improved organophotoreceptor that comprises an electrically conductive substrate having at least a surface; an inner photoconductive layer adjacent the surface of the electrically conductive substrate; and an outer photoconductive layer adjacent the inner photoconductive layer. In some embodiments, the inner photoconductive layer comprises a first binder in an amount not more than 45% by weight of the inner photoconductive layer, a first charge generating compound, and a charge transport compound, and the outer photoconductive layer comprises a second binder in an amount not less than 45% by weight of the outer photoconductive layer and a second charge generating compound. The inner photoconductive layer and the outer photoconductive layer can be discrete layers or sections of a gradient layer.
    Type: Application
    Filed: June 3, 2003
    Publication date: March 4, 2004
    Inventors: Jiayi Zhu, Ronald J. Moudry
  • Publication number: 20030224268
    Abstract: An electrophotographic photoreceptor including an electroconductive substrate, a charge generation layer overlying the electroconductive substrate to generate a first charge to form an electrostatic latent image when exposed to a first light, and a charge generation and transport layer overlying the charge generation layer to generate a second charge when exposed to second light and to transport the first and second charges to a surface of the photoreceptor.
    Type: Application
    Filed: February 21, 2003
    Publication date: December 4, 2003
    Inventors: Hiroshi Ikuno, Takeo Tsukamoto
  • Publication number: 20030113642
    Abstract: A photoreceptor including an electroconductive substrate; and a photosensitive layer located overlying the electroconductive substrate and comprising a charge generation material, a charge transport material and an inorganic filler, wherein the content of the inorganic filler at a surface side of the photosensitive layer is greater than that at a bottom side of the photosensitive layer near the electroconductive substrate, and wherein an outermost layer of the photoreceptor has a water vapor permeability not greater than 50 g·m−2·24 h−1.
    Type: Application
    Filed: May 1, 2002
    Publication date: June 19, 2003
    Inventors: Hidetoshi Kami, Tatsuya Niimi, Akihiko Matsuyama, Eiji Kurimoto, Nozomu Tamoto
  • Patent number: 6348290
    Abstract: An organic photoconductor is disclosed, which comprises a cylindrical electrically conductive support and, formed thereon in this order, a charge-generating layer and a charge-transporting layer, the external surface of the cylindrical electrically conductive support having an index of surface area as defined by the following equation (I) of from 0.01 to 0.10, and the charge-generating layer having a multilayer structure comprising a charge-generating layer having n-type semiconductor characteristics and a charge-generating layer having p-type semiconductor characteristics: (Sa/Sm)−1  (I) wherein Sa is the actual surface area of the external surface of the cylindrical electrically conductive support and Sm is the theoretical surface area thereof calculated on the assumption that the support is an ideal cylinder.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: February 19, 2002
    Assignee: Nippon Ink and Chemicals, Inc.
    Inventor: Saburo Yokota
  • Publication number: 20020009660
    Abstract: An electrophotographic light-receiving member has a conductive support and a light-receiving member having a photoconductive layer formed on the surface of the conductive support and composed of a non-single crystal material containing silicon atoms as a main component, hydrogen atoms and/or halogen atoms. The non-single crystal material which constitutes the photoconductive layer has an optical band gap of 1.8 eV to 1.85 eV, and the characteristic energy of an exponential tail obtained from a light absorption spectrum of the non-single crystal material is 50 meV to 55 meV. The electrophotographic light-receiving member is simultaneously improved in its charge performance, environmental stability and exposure memory, and has excellent potential characteristics and image properties.
    Type: Application
    Filed: December 23, 1996
    Publication date: January 24, 2002
    Inventors: HIROAKI NIINO, SATOSHI KOJIMA, SHINJI TSUCHIDA
  • Patent number: 6278055
    Abstract: A stacked organic photosensitive optoelectronic device optimized to enhance desired characteristics such as external quantum efficiency and voltage is described. The photosensitive optoelectronic device has a plurality of photosensitive optoelectronic subcells electrically configured in series. The substrate may be the bottom electrode or there may be a bottom electrode distinct from the substrate. Each subcell comprises one or more organic photoconductive layers between electrode layers or charge transfer layers. In one embodiment the top electrode is transparent. In other embodiments two or more electrodes are transparent. In other embodiments photosensitive optoelectronic devices with multilayer photoconductive structures and photosensitive optoelectronic devices with a reflective layer or a reflective substrate are disclosed.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: August 21, 2001
    Assignee: The Trustees of Princeton University
    Inventors: Stephen R. Forrest, Vladimir Bulovic
  • Publication number: 20010001057
    Abstract: A photoreceptor including: a charge transport layer; a top charge generating layer sensitive to a first light wavelength; a bottom charge generating layer sensitive to a second light wavelength; and a substrate, wherein the charge transport layer is positioned anywhere above the substrate, wherein the photoreceptor exhibits in response to exposure by the first light wavelength a first photodischarge curve having a first residual voltage and the photoreceptor exhibits in response to exposure by the second light wavelength a second photodischarge curve having a second residual voltage.
    Type: Application
    Filed: December 13, 2000
    Publication date: May 10, 2001
    Applicant: Xerox Corporation.
    Inventors: Andrew R. Melnyk, Paul A. Harmer, Kathleen M. Carmichael