Patents by Inventor Hongjun Zeng
Hongjun Zeng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10907264Abstract: A durable composite diamond electrode is disclosed which comprise at least a relatively thicker conductive UNCD (Ultrananocrystalline Diamond) layer, with low deposition cost, on a substrate underlying a relatively thinner conductive MCD (Microcrystalline Diamond) layer. The electrode exhibits long life and superior delamination resistance under extremely stressed electrochemical oxidation conditions. It is hypothesized that this improvement in electrode reliability is due to a combination of stress relief by the composite film with the slightly “softer” underlying UNCD “root” layer and the electrochemically durable overlying MCD “shield” layer, an effective disruption mechanism of the fracture propagation between the compositing layers, and thermal expansion coefficient match between the diamond layers and the substrate.Type: GrantFiled: June 10, 2016Date of Patent: February 2, 2021Assignee: Advanced Diamond Technologies, Inc.Inventors: Hongjun Zeng, John Arthur Carlisle, Ian Wakefield Wylie
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Patent number: 10858744Abstract: An electrolytic ozone generator includes an anode with a longitudinal edge, a cathode with a longitudinal edge spaced apart from the cathode, and an isolator. The isolator electrically separates the cathode from the anode and is semi-impermeable. The anode and cathode are impermeable for generating ozone in a flow area fluidly coupling longitudinal edges of the anode and the cathode. Ozone water apparatus, methods of making electrolytic ozone generators, and methods of generating ozone using electrolytic ozone generators are also described.Type: GrantFiled: October 20, 2017Date of Patent: December 8, 2020Assignee: Advanced Diamond Technologies, Inc.Inventors: Hongjun Zeng, Donato M. Ceres, John Wagner
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Patent number: 10662550Abstract: A method for forming diamond nanostructures with large specific area can include forming porous diamond nanostructures by means of selectively etching sp2-bonded carbon and partially removing sp3-bonded carbon in nanocrystalline diamond (NCD) and ultrananocrystalline diamond (UNCD® diamond). The diamond nanostructures achieved from the disclosed method can include a long shaft surrounded by a school of barbs. The nanostructure can provide a significantly larger surface area than diamond without such a nanostructure and its fabrication provides relative ease of manufacture compared to traditional techniques.Type: GrantFiled: November 2, 2017Date of Patent: May 26, 2020Assignee: JOHN CRANE INC.Inventors: Hongjun Zeng, Nicolaie A. Moldovan
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Patent number: 10662523Abstract: A novel composite diamond film comprising of a relatively thick layer of UNCD (Ultrananocrystalline Diamond) with a Young's modulus of less than 900 GPa and a relatively thin MCD (microcrystalline diamond) outermost layer with a Young's modulus of greater than 900 GPa, has been shown to exhibit superior delamination resistance under extreme shear stress. It is hypothesized that this improvement is due to a combination of stress relief by the composite film with a slightly “softer” UNCD layer, a disruption of the fracture mechanism through the composite layer(s), and the near ideal chemical and thermal expansion coefficient match between the two diamond layers. The combination of a thick but “softer” underlying UNCD layer with a thin but harder overlying MCD layer provides an excellent compromise between the low deposition cost and smoothness of UNCD with the extreme hardness and unparalleled chemical, electrochemical and immunological inertness of even a thin layer of MCD.Type: GrantFiled: May 27, 2016Date of Patent: May 26, 2020Assignee: JOHN CRANE INC.Inventors: Hongjun Zeng, John Arthur Carlisle, Ian Wakefield Wylie
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Patent number: 10259727Abstract: An electrochemical system and method are disclosed for On Site Generation (OSG) of oxidants, such as free available chlorine, mixed oxidants and persulfate. Operation at high current density, using at least a diamond anode, provides for higher current efficiency, extended lifetime operation, and improved cost efficiency. High current density operation, in either a single pass or recycle mode, provides for rapid generation of oxidants, with high current efficiency, which potentially allows for more compact systems. Beneficially, operation in reverse polarity for a short cleaning cycle manages scaling, provides for improved efficiency and electrode lifetime and allows for use of impure feedstocks without requiring water softeners. Systems have application for generation of chlorine or other oxidants, including mixed oxidants providing high disinfection rate per unit of oxidant, e.g. for water treatment to remove microorganisms or for degradation of organics in industrial waste water.Type: GrantFiled: August 10, 2018Date of Patent: April 16, 2019Assignee: Advanced Diamond Technologies, Inc.Inventors: Ian Wakefield Wylie, Prabhu U. Arumugam, Hongjun Zeng, John Arthur Carlisle
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Publication number: 20180346352Abstract: An electrochemical system and method are disclosed for On Site Generation (OSG) of oxidants, such as free available chlorine, mixed oxidants and persulfate. Operation at high current density, using at least a diamond anode, provides for higher current efficiency, extended lifetime operation, and improved cost efficiency. High current density operation, in either a single pass or recycle mode, provides for rapid generation of oxidants, with high current efficiency, which potentially allows for more compact systems. Beneficially, operation in reverse polarity for a short cleaning cycle manages scaling, provides for improved efficiency and electrode lifetime and allows for use of impure feedstocks without requiring water softeners. Systems have application for generation of chlorine or other oxidants, including mixed oxidants providing high disinfection rate per unit of oxidant, e.g. for water treatment to remove microorganisms or for degradation of organics in industrial waste water.Type: ApplicationFiled: August 10, 2018Publication date: December 6, 2018Applicant: Advanced Diamond Technologies, Inc.Inventors: Ian Wakefield Wylie, Prabhu U. Arumugam, Hongjun Zeng, John Arthur Carlisle
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Patent number: 10046989Abstract: An electrochemical system and method are disclosed for On Site Generation (OSG) of oxidants, such as free available chlorine, mixed oxidants and persulfate. Operation at high current density, using at least a diamond anode, provides for higher current efficiency, extended lifetime operation, and improved cost efficiency. High current density operation, in either a single pass or recycle mode, provides for rapid generation of oxidants, with high current efficiency, which potentially allows for more compact systems. Beneficially, operation in reverse polarity for a short cleaning cycle manages scaling, provides for improved efficiency and electrode lifetime and allows for use of impure feedstocks without requiring water softeners. Systems have application for generation of chlorine or other oxidants, including mixed oxidants providing high disinfection rate per unit of oxidant, e.g. for water treatment to remove microorganisms or for degradation of organics in industrial waste water.Type: GrantFiled: April 23, 2015Date of Patent: August 14, 2018Assignee: Advanced Diamond Technologies, Inc.Inventors: Ian Wakefield Wylie, Prabhu U. Arumugam, Hongjun Zeng, John Arthur Carlisle
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Publication number: 20180119308Abstract: A method for forming diamond nanostructures with large specific area can include forming porous diamond nanostructures by means of selectively etching sp2-bonded carbon and partially removing sp3-bonded carbon in nanocrystalline diamond (NCD) and ultrananocrystalline diamond (UNCD® diamond). The diamond nanostructures achieved from the disclosed method can include a long shaft surrounded by a school of barbs. The nanostructure can provide a significantly larger surface area than diamond without such a nanostructure and its fabrication provides relative ease of manufacture compared to traditional techniques.Type: ApplicationFiled: November 2, 2017Publication date: May 3, 2018Inventors: Hongjun Zeng, Nicolaie A. Moldovan
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Publication number: 20180112317Abstract: An electrolytic ozone generator includes an anode with a longitudinal edge, a cathode with a longitudinal edge spaced apart from the cathode, and an isolator. The isolator electrically separates the cathode from the anode and is semi-impermeable. The anode and cathode are impermeable for generating ozone in a flow area fluidly coupling longitudinal edges of the anode and the cathode. Ozone water apparatus, methods of making electrolytic ozone generators, and methods of generating ozone using electrolytic ozone generators are also described.Type: ApplicationFiled: October 20, 2017Publication date: April 26, 2018Applicant: Advanced Diamond Technologies, Inc.Inventors: Hongjun Zeng, Donato M. Ceres, John Wagner
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Publication number: 20160362803Abstract: A novel durable composite diamond electrode comprising at least a relatively thicker conductive layer of UNCD (Ultrananocrystalline Diamond) layer with a Young's modulus of less than 900 GPa on a niobium substrate underlying a relatively thinner conductive MCD (Microcrystalline Diamond) layer with a Young's modulus of greater than 900 GPa, has been shown to exhibit superior delamination resistance under extreme shear stress during electrochemical oxidation reliability testing. Highly accelerated lifetime testing of these durable composite diamond electrodes at a constant current density of 2.5 amps/cm2 (25000 amps/m2) in a 1 M NaCl (58 g/L) solution, have demonstrated lifetimes before delamination failure of greater than 2000 hours (i.e. >5000 Ahr/cm2). Using a conservative estimate of lifetime to failure with a cubed dependence on current density, the lifetime at a more typical operating current density of 0.25 amps/cm2 (2500 amps/m2) would be at least 2,000,000 hours (228 years) and >3.5 years at 1.Type: ApplicationFiled: June 10, 2016Publication date: December 15, 2016Applicant: Advanced Diamond Technologies, Inc.Inventors: Hongjun Zeng, John Arthur Carlisle, Ian Wakefield Wylie
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Publication number: 20160348236Abstract: A novel composite diamond film comprising of a relatively thick layer of UNCD (Ultrananocrystalline Diamond) with a Young's modulus of less than 900 GPa and an underlying relatively thin MCD (microcrystalline diamond) layer with a Young's modulus of greater than 900 GPa, has been shown to exhibit superior delamination resistance under extreme shear stress. It is hypothesized that this improvement is due to a combination of stress relief by the composite film with a slightly “softer” UNCD layer, a disruption of the fracture mechanism through the composite layer(s), and the near ideal chemical and thermal expansion coefficient match between the two diamond layers. The combination of a thick but “softer” underlying UNCD layer with a thin but harder overlying MCD layer provides an excellent compromise between the low deposition cost and smoothness of UNCD with the extreme hardness and unparalleled chemical, electrochemical and immunological inertness of even a thin layer of MCD.Type: ApplicationFiled: May 27, 2016Publication date: December 1, 2016Applicant: Advanced Diamond Technologies, Inc.Inventors: Hongjun Zeng, John Arthur Carlisle, Ian Wakefield Wylie
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Publication number: 20160280567Abstract: An electrochemical system and method are disclosed for On Site Generation (OSG) of oxidants, such as free available chlorine, mixed oxidants and persulfate. Operation at high current density, using at least a diamond anode, provides for higher current efficiency, extended lifetime operation, and improved cost efficiency. High current density operation, in either a single pass or recycle mode, provides for rapid generation of oxidants, with high current efficiency, which potentially allows for more compact systems. Beneficially, operation in reverse polarity for a short cleaning cycle manages scaling, provides for improved efficiency and electrode lifetime and allows for use of impure feedstocks without requiring water softeners. Systems have application for generation of chlorine or other oxidants, including mixed oxidants providing high disinfection rate per unit of oxidant, e.g. for water treatment to remove microorganisms or for degradation of organics in industrial waste water.Type: ApplicationFiled: April 23, 2015Publication date: September 29, 2016Applicant: Advanced Diamond Technologies, Inc.Inventors: Ian W. Wylie, Prabhu U. Arumugam, Hongjun Zeng, John A. Carlisle
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Publication number: 20150250421Abstract: Conductive diamond micro-electrode sensors and sensor arrays are disclosed for in vivo chemical sensing. Also provided is a method of fabrication of individual sensors and sensor arrays. Reliable, sensitive and selective chemical micro-sensors may be constructed for real-time, continuous monitoring of neurotransmitters and neuro-active substances in vivo. Each sensor comprises a conductive microwire, having a distal end comprising a tip, coated with nanocrystalline or ultrananocrystalline conductive diamond, and an overlying insulating layer. Active sensor areas of the conductive diamond layer are defined by openings in the insulating layer at the distal end. Multiple sensor areas may be defined by a 2 or 3 dimensional pattern of openings near the tip. This structure limits interference from surrounding areas for improved signal to noise ratio, sensitivity and selectivity.Type: ApplicationFiled: September 26, 2013Publication date: September 10, 2015Inventors: Prabhu U. Arumugam, Shabnam Siddiqui, Hongjun Zeng
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Publication number: 20150140740Abstract: A method of fabrication, a device structure and a submount comprising high thermal conductivity (HTC) diamond on a HTC metal substrate, for thermal dissipation, are disclosed. The surface roughness of the diamond layer is controlled by depositing diamond on a sacrificial substrate, such as a polished silicon wafer, having a specific surface roughness. Following deposition of the diamond layer, an adhesion layer, e.g. comprising a refractory metal, such as tantalum, and at least one layer of HTC metal is provided. The HTC metal substrate is preferably copper or silver, and may be provided by electroforming metal onto a thin sputtered base layer, and optionally bonding another metal layer. The electrically non-conductive diamond layer has a smooth exposed surface, preferably ?10 nm RMS, suitable for patterning of contact metallization and/or bonding to a semiconductor device. Methods are also disclosed for patterning the diamond on metal substrate to facilitate dicing.Type: ApplicationFiled: December 15, 2014Publication date: May 21, 2015Applicant: Advanced Diamond Technologies, Inc.Inventors: Nicolaie A. Moldovan, John A. Carlisle, Hongjun Zeng
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Publication number: 20140174942Abstract: An electrochemical system and method are disclosed for On Site Generation (OSG) of oxidants, such as free available chlorine, mixed oxidants and persulfate. Operation at high current density, using at least a diamond anode, provides for higher current efficiency, extended lifetime operation, and improved cost efficiency. High current density operation, in either a single pass or recycle mode, provides for rapid generation of oxidants, with high current efficiency, which potentially allows for more compact systems. Beneficially, operation in reverse polarity for a short cleaning cycle manages scaling, provides for improved efficiency and electrode lifetime and allows for use of impure feedstocks without requiring water softeners. Systems have application for generation of chlorine or other oxidants, including mixed oxidants providing high disinfection rate per unit of oxidant, e.g. for water treatment to remove microorganisms or for degradation of organics in industrial waste water.Type: ApplicationFiled: October 15, 2013Publication date: June 26, 2014Applicant: ADVANCED DIAMOND TECHNOLOGIES, INC.Inventors: Ian W. Wylie, Prabhu U. Arumugam, Hongjun Zeng, John Arthur Carlisle
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Publication number: 20120288698Abstract: A method of fabrication, a device structure and a submount comprising high thermal conductivity (HTC) diamond on a HTC metal substrate, for thermal dissipation, are disclosed. The surface roughness of the diamond layer is controlled by depositing diamond on a sacrificial substrate, such as a polished silicon wafer, having a specific surface roughness. Following deposition of the diamond layer, an adhesion layer, e.g. comprising a refractory metal, such as tantalum, and at least one layer of HTC metal is provided. The HTC metal substrate is preferably copper or silver, and may be provided by electroforming metal onto a thin sputtered base layer, and optionally bonding another metal layer. The electrically non-conductive diamond layer has a smooth exposed surface, preferably ?10 nm RMS, suitable for patterning of contact metallization and/or bonding to a semiconductor device. Methods are also disclosed for patterning the diamond on metal substrate to facilitate dicing.Type: ApplicationFiled: March 19, 2012Publication date: November 15, 2012Applicant: Advanced Diamond Technology, IncInventors: Nicolaie A. MOLDOVAN, John Arthur Carlisle, Hongjun Zeng