Patents by Inventor Beihai Ma
Beihai Ma 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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Publication number: 20150116894Abstract: A lead-lanthanum-zirconium-titanate (PLZT) capacitor on a substrate formed of glass. The first metallization layer is deposited on a top side of the substrate to form a first electrode. The dielectric layer of PLZT is deposited over the first metallization layer. The second metallization layer deposited over the dielectric layer to form a second electrode. The glass substrate is advantageous as glass is compatible with an annealing process used to form the capacitor.Type: ApplicationFiled: October 29, 2013Publication date: April 30, 2015Inventors: M. RAY FAIRCHILD, RALPH S. TAYLOR, CARL W. BERLIN, CELINE WK WONG, BEIHAI MA, UTHAMALINGAM BALACHANDRAN
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Patent number: 8974856Abstract: The present invention provides a method for fabricating a ceramic film on a copper foil. The method comprises applying a layer of a sol-gel composition onto a copper foil. The sol-gel composition comprises a precursor of a ceramic material suspended in 2-methoxyethanol. The layer of sol-gel is then dried at a temperature up to about 250° C. The dried layer is then pyrolyzed at a temperature in the range of about 300 to about 450° C. to form a ceramic film from the ceramic precursor. The ceramic film is then crystallized at a temperature in the range of about 600 to about 750° C. The drying, pyrolyzing and crystallizing are performed under a flowing stream of an inert gas. In some embodiments an additional layer of the sol-gel composition is applied onto the ceramic film and the drying, pyrolyzing and crystallizing steps are repeated for the additional layer to build up a thicker ceramic layer on the copper foil. The process can be repeated one or more times if desired.Type: GrantFiled: May 25, 2010Date of Patent: March 10, 2015Assignee: UChicago Argonne, LLCInventors: Beihai Ma, Manoj Narayanan, Stephen E. Dorris, Uthamalingam Balachandran
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Publication number: 20140120736Abstract: The invention provides a process for forming crack-free dielectric films on a substrate. The process comprises the application of a dielectric precursor layer of a thickness from about 0.3 ?m to about 1.0 ?m to a substrate. The deposition is followed by low temperature heat pretreatment, prepyrolysis, pyrolysis and crystallization step for each layer. The deposition, heat pretreatment, prepyrolysis, pyrolysis and crystallization are repeated until the dielectric film forms an overall thickness of from about 1.5 ?m to about 20.0 ?m and providing a final crystallization treatment to form a thick dielectric film. The process provides a thick crack-free dielectric film on a substrate, the dielectric forming a dense thick crack-free dielectric having an overall dielectric thickness of from about 1.5 ?m to about 20.0 ?m.Type: ApplicationFiled: January 2, 2014Publication date: May 1, 2014Inventors: Beihai Ma, Manoj Narayanan, Uthamalingam Balachandran, Sheng Chao, Shanshan Lie
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Patent number: 8647737Abstract: The invention provides a process for forming crack-free dielectric films on a substrate. The process comprise the application of a dielectric precursor layer of a thickness from about 0.3 ?m to about 1.0 ?m to a substrate. The deposition is followed by low temperature heat pretreatment, prepyrolysis, pyrolysis and crystallization step for each layer. The deposition, heat pretreatment, prepyrolysis, pyrolysis and crystallization are repeated until the dielectric film forms an overall thickness of from about 1.5 ?m to about 20.0 ?m and providing a final crystallization treatment to form a thick dielectric film. Also provided was a thick crack-free dielectric film on a substrate, the dielectric forming a dense thick crack-free dielectric having an overall dielectric thickness of from about 1.5 ?m to about 20.0 ?m.Type: GrantFiled: September 30, 2011Date of Patent: February 11, 2014Assignee: UChicago Argonne, LLCInventors: Beihai Ma, Uthamalingam Balachandran, Sheng Chao, Shanshan Liu, Manoj Narayanan
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Publication number: 20130335882Abstract: The invention is directed to a process for making a dielectric ceramic film capacitor and the ceramic dielectric laminated capacitor formed therefrom, the dielectric ceramic film capacitors having increased dielectric breakdown strength. The invention increases breakdown strength by embedding a conductive oxide layer between electrode layers within the dielectric layer of the capacitors. The conductive oxide layer redistributes and dissipates charge, thus mitigating charge concentration and micro fractures formed within the dielectric by electric fields.Type: ApplicationFiled: June 14, 2012Publication date: December 19, 2013Applicant: UCHICAGO ARGONNE, LLC.Inventors: Beihai Ma, Uthamalingam Balachandran, Shanshan Liu
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Publication number: 20130084444Abstract: The invention provides a process for forming crack-free dielectric films on a substrate. The process comprise the application of a dielectric precursor layer of a thickness from about 0.3 ?m to about 1.0 ?m to a substrate. The deposition is followed by low temperature heat pretreatment, prepyrolysis, pyrolysis and crystallization step for each layer. The deposition, heat pretreatment, prepyrolysis, pyrolysis and crystallization are repeated until the dielectric film forms an overall thickness of from about 1.5 ?m to about 20.0 ?m and providing a final crystallization treatment to form a thick dielectric film. Also provided was a thick crack-free dielectric film on a substrate, the dielectric forming a dense thick crack-free dielectric having an overall dielectric thickness of from about 1.5 ?m to about 20.0 ?m.Type: ApplicationFiled: September 30, 2011Publication date: April 4, 2013Applicant: UCHICAGO ARGONNE, LLCInventors: Beihai Ma, Uthamalingam Balachandran, Sheng Chao, Shanshan Liu, Manoj Narayanan
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Publication number: 20130071670Abstract: The invention provides for A method for producing pure phase strontium ruthenium oxide films, the method comprising solubilizing ruthenium-containing and strontium-containing compounds to create a mixture; subjecting the mixture to a first temperature above that necessary for forming RuO2 while simultaneously preventing formation of RuO2; maintaining the first temperature for a time to remove organic compounds from the mixture, thereby forming a substantially dry film; and subjecting the film to a second temperature for time sufficient to crystallize the film. Also provided is pure phase material comprising strontium ruthenium oxide wherein the material contains no RuO2.Type: ApplicationFiled: September 20, 2011Publication date: March 21, 2013Applicant: UCHICAGO ARGONNE, LLCInventors: Manoj Narayanan, Beihai Ma, Uthamalingam Balachandran, Stephen Dorris
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Publication number: 20120257324Abstract: The invention provides a stacked capacitor configuration comprising subunits each with a thickness of as low as 20 microns. Also provided is combination capacitor and printed wire board wherein the capacitor is encapsulated by the wire board. The invented capacitors are applicable in micro-electronic applications and high power applications, whether it is AC to DC or DC to AC, or DC to DC.Type: ApplicationFiled: June 20, 2012Publication date: October 11, 2012Applicant: UCHICAGO ARGONNE, LLCInventors: Beihai Ma, Uthamalingam Balachandran
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Publication number: 20100302706Abstract: The present invention provides a method for fabricating a ceramic film on a copper foil. The method comprises applying a layer of a sol-gel composition onto a copper foil. The sol-gel composition comprises a precursor of a ceramic material suspended in 2-methoxyethanol. The layer of sol-gel is then dried at a temperature up to about 250° C. The dried layer is then pyrolyzed at a temperature in the range of about 300 to about 450° C. to form a ceramic film from the ceramic precursor. The ceramic film is then crystallized at a temperature in the range of about 600 to about 750° C. The drying, pyrolyzing and crystallizing are performed under a flowing stream of an inert gas. In some embodiments an additional layer of the sol-gel composition is applied onto the ceramic film and the drying, pyrolyzing and crystallizing steps are repeated for the additional layer to build up a thicker ceramic layer on the copper foil. The process can be repeated one or more times if desired.Type: ApplicationFiled: May 25, 2010Publication date: December 2, 2010Applicant: UCHICAGO ARGONNE, LLCInventors: Beihai MA, Manoj NARAYANAN, Stephen E. DORRIS, Uthamalingam BALACHANDRAN
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Patent number: 7560291Abstract: A layered article of manufacture and a method of manufacturing same is disclosed. A substrate has a biaxially textured MgO crystalline layer having the c-axes thereof inclined with respect to the plane of the substrate deposited thereon. A layer of one or more of YSZ or Y2O3 and then a layer of CeO2 is deposited on the MgO. A crystalline superconductor layer with the c-axes thereof normal to the plane of the substrate is deposited on the CeO2 layer. Deposition of the MgO layer on the substrate is by the inclined substrate deposition method developed at Argonne National Laboratory. Preferably, the MgO has the c-axes thereof inclined with respect to the normal to the substrate in the range of from about 10° to about 40° and YBCO superconductors are used.Type: GrantFiled: January 11, 2006Date of Patent: July 14, 2009Assignee: UChicago Argonne, LLCInventors: Uthamalingam Balachandran, Beihai Ma, Dean Miller
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Publication number: 20070090342Abstract: A layered article of manufacture and a method of manufacturing same is disclosed. A substrate has a biaxially textured MgO crystalline layer having the c-axes thereof inclined with respect to the plane of the substrate deposited thereon. A layer of one or more of YSZ or Y2O3 and then a layer of CeO2 is deposited on the MgO. A crystalline superconductor layer with the c-axes thereof normal to the plane of the substrate is deposited on the CeO2 layer. Deposition of the MgO layer on the substrate is by the inclined substrate deposition method developed at Argonne National Laboratory. Preferably, the MgO has the c-axes thereof inclined with respect to the normal to the substrate in the range of from about 10° to about 40° and YBCO superconductors are used.Type: ApplicationFiled: January 11, 2006Publication date: April 26, 2007Applicant: The University of ChicagoInventors: Uthamalingam Balachandran, Beihai Ma, Dean Miller
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Patent number: 7012275Abstract: A layered article of manufacture and a method of manufacturing same is disclosed. A substrate has a biaxially textured MgO crystalline layer having the c-axes thereof inclined with respect to the plane of the substrate deposited thereon. A layer of one or more of YSZ or Y2O3 and then a layer of CeO2 is deposited on the MgO. A crystalline superconductor layer with the c-axes thereof normal to the plane of the substrate is deposited on the CeO2 layer. Deposition of the MgO layer on the substrate is by the inclined substrate deposition method developed at Argonne National Laboratory. Preferably, the MgO has the c-axes thereof inclined with respect to the normal to the substrate in the range of from about 10° to about 40° and YBCO superconductors are used.Type: GrantFiled: February 17, 2004Date of Patent: March 14, 2006Assignee: The University of ChicagoInventors: Uthamalingam Balachandran, Beihai Ma, Dean Miller
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Publication number: 20050181953Abstract: A layered article of manufacture and a method of manufacturing same is disclosed. A substrate has a biaxially textured MgO crystalline layer having the c-axes thereof inclined with respect to the plane of the substrate deposited thereon. A layer of one or more of YSZ or Y2O3 and then a layer of CeO2 is deposited on the MgO. A crystalline superconductor layer with the c-axes thereof normal to the plane of the substrate is deposited on the CeO2 layer. Deposition of the MgO layer on the substrate is by the inclined substrate deposition method developed at Argonne National Laboratory. Preferably, the MgO has the c-axes thereof inclined with respect to the normal to the substrate in the range of from about 10° to about 40° and YBCO superconductors are used.Type: ApplicationFiled: February 17, 2004Publication date: August 18, 2005Applicant: The University of ChicagoInventors: Uthamalingam Balachandran, Beihai Ma, Dean Miller
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Publication number: 20050048329Abstract: A layered composition of a Cu-containing ceramic superconductor layer and a Ag-containing layer having between about 0.1 and about 0.3 atom percent Cu. The ceramic superconductor may be in contact with the Ag-containing copper doped layer which may be one or more of a substrate, a stabilizer or a sheath. Oxide superconductors are preferred.Type: ApplicationFiled: August 26, 2003Publication date: March 3, 2005Applicant: The University of ChicagoInventors: Ruxandra Baurceanu, Thomas Wiencek, Stephen Dorris, Uthamalingam Balachandran, Beihai Ma
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Patent number: 6579360Abstract: A method of forming a biaxially aligned superconductor on a non-biaxially aligned substrate substantially chemically inert to the biaxially aligned superconductor comprising is disclosed. A non-biaxially aligned substrate chemically inert to the superconductor is provided and a biaxially aligned superconductor material is deposited directly on the non-biaxially aligned substrate. A method forming a plume of superconductor material and contacting the plume and the non-biaxially aligned substrate at an angle greater than 0° and less than 90° to deposit a biaxially aligned superconductor on the non-biaxially aligned substrate is also disclosed. Various superconductors and substrates are illustrated.Type: GrantFiled: July 13, 2001Date of Patent: June 17, 2003Assignee: The University of ChicagoInventors: Uthamalingam Balachandran, Stephen E. Dorris, Beihai Ma, Meiya Li
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Publication number: 20030013613Abstract: A method of forming a biaxially aligned superconductor on a non-biaxially aligned substrate substantially chemically inert to the biaxially aligned superconductor comprising is disclosed. A non-biaxially aligned substrate chemically inert to the superconductor is provided and a biaxially aligned superconductor material is deposited directly on the non-biaxially aligned substrate. A method forming a plume of superconductor material and contacting the plume and the non-biaxially aligned substrate at an angle greater than 0° and less than 90° to deposit a biaxially aligned superconductor on the non-biaxially aligned substrate is also disclosed. Various superconductors and substrates are illustrated.Type: ApplicationFiled: July 13, 2001Publication date: January 16, 2003Inventors: Uthamalingam Balachandran, Stephen E. Dorris, Beihai Ma, Meiya Li