Patents by Inventor Yigal D. Blum
Yigal D. Blum 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: 10541090Abstract: The invention pertains to the field of electronic devices and the preparation thereof. In an aspect is an electronic device comprising a nanocomposite of carbon nanodomains homogeneously embedded in an insulating ceramic matrix, wherein the size and distribution of carbon nanodomains is such that the nanocomposite has a permittivity of greater than or equal to 200.Type: GrantFiled: September 6, 2015Date of Patent: January 21, 2020Assignee: SRI InternationalInventors: Yigal D Blum, Winston K. Chan, John W. Hodges, David K. Hui, Srinivasan Krishnamurthy, David Brent McQueen, Marc Rippen
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Publication number: 20160005552Abstract: The invention pertains to the field of electronic devices and the preparation thereof. In an aspect is an electronic device comprising a nanocomposite of carbon nanodomains homogeneously embedded in an insulating ceramic matrix, wherein the size and distribution of carbon nanodomains is such that the nanocomposite has a permittivity of greater than or equal to 200.Type: ApplicationFiled: September 6, 2015Publication date: January 7, 2016Applicant: SRI INTERNATIONALInventors: Yigal D. Blum, Winston K. Chan, John W. Hodges, David K. Hui, Srinivasan Krishnamurthy, David Brent McQueen, Marc Rippen
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Patent number: 8536295Abstract: The disclosure provides methods and materials for imparting corrosion resistance to a substrate, as well as the corrosion-resistant substrates prepared accordingly. Compositions and methods include nonpyrolyzed, silicon-based polymer coatings prepared on substrates. The prepared coatings are highly stable and resistant to corrosion. The invention finds utility, for example, in the fields of surface and coating chemistry. The composition contains silicon-containing polymers having units of the following formulae: [R1Si(OH)O]k??(III) [R1Si(OR10)O]m??(IV) [R1SiO1.5]n??(V) [R1Si(H)O]p??(VI) [R2R3SiO]q??(VII).Type: GrantFiled: December 20, 2011Date of Patent: September 17, 2013Assignee: SRI InternationalInventors: Yigal D. Blum, David K. Hui, David Brent MacQueen
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Patent number: 8476119Abstract: The disclosure provides methods and materials suitable for use as encapsulation barriers and dielectric layers in electronic devices. In one embodiment, for example, there is provided an electroluminescent device or other electronic device with a dielectric layer comprising alternating layers of a silicon-containing bonding material and a ceramic material. The methods provide, for example, electronic devices with increased stability and shelf-life. The invention is useful, for example, in the field of microelectronic devices.Type: GrantFiled: March 4, 2009Date of Patent: July 2, 2013Assignee: SRI InternationalInventors: Yigal D. Blum, William Siu-Keung Chu, David Brent MacQueen, Yijian Shi
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Patent number: 8466011Abstract: The disclosure provides methods and materials suitable for use as encapsulation barriers in electronic devices. In one embodiment, for example, there is provided an electroluminescent device or other electronic device encapsulated by alternating layers of a silicon-containing bonding material and a ceramic material. The encapsulation methods provide, for example, electronic devices with increased stability and shelf-life. The invention is useful, for example, in the field of microelectronic devices.Type: GrantFiled: March 4, 2009Date of Patent: June 18, 2013Assignee: SRI InternationalInventors: Yigal D. Blum, William Siu-Keung Chu, David Brent MacQueen, Yijian Shi
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Publication number: 20120038067Abstract: The disclosure provides methods and materials suitable for use as encapsulation barriers in electronic devices. In one embodiment, for example, there is provided an electroluminescent device or other electronic device encapsulated by alternating layers of a silicon-containing bonding material and a ceramic material. The encapsulation methods provide, for example, electronic devices with increased stability and shelf-life. The invention is useful, for example, in the field of microelectronic devices.Type: ApplicationFiled: March 4, 2009Publication date: February 16, 2012Inventors: Yigal D. Blum, William Siu-Keung Chu, David Brent MacQueen, Yijian Shi
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Publication number: 20120038066Abstract: The disclosure provides methods and materials suitable for use as encapsulation barriers and dielectric layers in electronic devices. In one embodiment, for example, there is provided an electroluminescent device or other electronic device with a dielectric layer comprising alternating layers of a silicon-containing bonding material and a ceramic material. The methods provide, for example, electronic devices with increased stability and shelf-life. The invention is useful, for example, in the field of microelectronic devices.Type: ApplicationFiled: March 4, 2009Publication date: February 16, 2012Applicant: SRI INTERNATIONALInventors: Yigal D. Blum, William Siu-Keung Chu, David Brent MacQueen, Yijian Shi
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Patent number: 8101242Abstract: The disclosure provides methods and materials for imparting corrosion resistance to a substrate, as well as the corrosion-resistant substrates prepared accordingly. Compositions and methods include nonpyrolyzed, silicon-based polymer coatings prepared on substrates. The prepared coatings are highly stable and resistant to corrosion. The invention finds utility, for example, in the fields of surface and coating chemistry.Type: GrantFiled: March 5, 2009Date of Patent: January 24, 2012Assignee: SRI InternationalInventors: Yigal D. Blum, David K. Hui, David Brent MacQueen
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Publication number: 20020011439Abstract: A Porous ceramic filter and its method of production are disclosed. The ceramic filter has at least one porous layer (or skin) made of a binder formed of a cured ceramic powder and a preceramic or pyrolyzed ceramic precursor optionally containing a source of zirconia. In some embodiments, the binder is formed of the zirconia source only. The presence of the zirconia gives a skin with good mechanical strength and corrosion resistance to both acidic and basic solutions.Type: ApplicationFiled: February 28, 2001Publication date: January 31, 2002Inventors: Yigal D. Blum, Sylvia M. Johnson, Huiyong Chen
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Patent number: 5919572Abstract: Surfaces of various types of substrates, including glass, ceramics, metals and fabrics, are rendered thermally stable by treatment with a silicon-containing polymer which may be a polysilazane, a polysiloxane, or a polysiloxazane. Curing the polymer in an atmosphere which contains an oxygen donor additionally renders the substrate surface nonwetting.Type: GrantFiled: October 31, 1994Date of Patent: July 6, 1999Assignee: SRI InternationalInventors: Yigal D. Blum, Gregory A. McDermott
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Patent number: 5635250Abstract: A method is provided for preparing ceramic precursors from hydridosiloxane starting materials and then pyrolyzing these precursors to give rise to silicious ceramic materials. Si--H bonds present in the hydridosiloxane starting materials are catalytically activated, and the activated hydrogen atoms may then be replaced with nonhydrogen substituents. These preceramic materials are pyrolyzed in a selected atmosphere to give the desired ceramic product. Ceramic products which may be prepared by this technique include silica, silicon oxynitride, silicon carbide, metal silicates, and mullite.Type: GrantFiled: May 9, 1995Date of Patent: June 3, 1997Assignee: SRI InternationalInventors: Yigal D. Blum, Sylvia M. Johnson, Michael I. Gusman
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Patent number: 5405655Abstract: Surfaces of various types of substrates, including glass, ceramics, metals and fabrics, are rendered thermally stable by treatment with a silicon-containing polymer which may be a polysilazane, a polysiloxane, or a polysiloxazane. Curing the polymer in an atmosphere which contains an oxygen donor additionally renders the substrate surface nonwetting.Type: GrantFiled: November 19, 1992Date of Patent: April 11, 1995Assignee: SRI InternationalInventors: Yigal D. Blum, Gregory A. McDermott
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Patent number: 5322913Abstract: Silazanes and related compounds are prepared by (a) providing a precursor containing at least one Si--N bond, cleaving an Si--N bond in the precursor in the presence of hydrogen or a hydrogen donor, and reacting the cleavage product with a second cleavage product or with a compound containing an Si--H bond, an N--H bond, or both, to produce an initial silazane product having at least one newly formed Si--N bond or (b) providing one or more reactants which contain an Si--H bond and an N--H bond, and causing reaction to occur between the two bonds in the presence of a transition metal catalyst to form an initial silazane product having newly formed Si--N bonds. Further products may result from additional reaction of either type. Novel compounds, including siloxazanes and high molecular weight polysilazanes, are provided. The compounds may be pyrolyzed to yield ceramic materials such as silicon nitride, silicon carbide and silicon oxynitride.Type: GrantFiled: June 19, 1990Date of Patent: June 21, 1994Assignee: SRI InternationalInventors: Yigal D. Blum, Richard M. Laine, Kenneth B. Schwartz, Robert M. Platz, David J. Rowcliffe, Allen L. Dodge, Jonathan M. McLeod, Daryl L. Roberts
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Patent number: 5162136Abstract: A method is disclosed for improving the rupture strength of a glass material which comprises coating an unannealed glass material with a tractable preceramic coating material capable of pyrolyzing to form a ceramic coating at a temperature not exceeding the annealing temperature of the glass material and heating the coated glass material to a temperature sufficiently high to permit pyrolysis of the pre-ceramic polymer without exceeding the annealing temperature of the glass for a period of time sufficient to form a ceramic coating on the surface of the glass material.Type: GrantFiled: July 30, 1990Date of Patent: November 10, 1992Inventors: Yigal D. Blum, Robert M. Platz
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Patent number: 5055431Abstract: Silazanes and related compounds are prepared by providing a precursor containing one or more cyclic silazane units, causing polymerization to occur in the presence of a transition metal catalyst to form a polysilazane product. Further products may result from additional reaction. The novel compounds may be pyrolyzed to yield ceramic materials such as silicon nitride, silicon carbide and mixtures thereof. In a preferred embodiment, substantially pure silicon nitride and articles prepared therefrom are provided. Fibers, coatings, binders and the like may be prepared from the novel materials.Type: GrantFiled: April 3, 1990Date of Patent: October 8, 1991Assignee: SRI InternationalInventors: Yigal D. Blum, Edward J. Crawford
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Patent number: 5017529Abstract: A process for preparing tractable preceramic precursors of Group IIIA metal/Group VA nonmetal compounds, such as BN, in which a first reactant containing a Group VA nonmetal to hydrogen bond, such as ammonia or an amine is reacted with a second reactant containing a Group IIIA metal to hydrogen bond, such as a metal hydride, in the presence of a metal catalyst that catalyzes dehydrocoupling of the bonds to form the precursor. Further reaction of the precursor in the presence of the catalyst forms oligomeric/polymeric forms of the precursor.Type: GrantFiled: December 1, 1989Date of Patent: May 21, 1991Assignee: SRI InternationalInventors: Yigal D. Blum, Richard M. Laine
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Patent number: 5008422Abstract: Silazanes and related compounds are prepared by (a) providing a precursor containing at least one Si-N bond, cleaving an Si-N bond in the precursor in the presence of hydrogen or a hydrogen donor, and reacting the cleavage product with a second cleavage product or with a compound containing an Si-H bond, an N-H bond, or both, to produce an initial silazane product having at least one newly formed Si-N bond or (b) providing one or more reactants which contain an Si-H bond and an N-H bond, and causing reaction to occur between the two bonds in the presence of a transition metal catalyst to form an initial silazane product having newly formed Si-N bonds. Further products may result from additional reaction of either type. Novel compounds, including siloxazanes and high molecular weight polysilazanes, are provided. The compounds may be pyroloyzed to yield ceramic materials such as silicon nitride, silicon carbide and silicon oxynitride.Type: GrantFiled: December 1, 1986Date of Patent: April 16, 1991Assignee: SRI InternationalInventors: Yigal D. Blum, Richard M. Laine
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Patent number: 4952715Abstract: Silazanes and related compounds are prepared by providing a precursor containing one or more cyclic silazane units, causing polymerization to occur in the presence of a transition metal catalyst to form a polysilazane product. Further products may result from additional reaction. The novel compounds may be pyrolyzed to yield ceramic materials such as silicon nitride, silicon carbide and mixtures thereof. In a preferred embodiment, substantially pure silicon nitride and articles prepared therefrom are provided. Fibers, coatings, binders and the like may be prepared from the novel materials.Type: GrantFiled: April 4, 1988Date of Patent: August 28, 1990Assignee: SRI InternationalInventors: Yigal D. Blum, Edward J. Crawford
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Patent number: 4801439Abstract: A process for preparing tractable preceramic precursors of Group IIIA metal/Group VA nonmetal compounds, such as BN, in which a first reactant containing a Group VA nonmetal to hydrogen bond, such as ammonia or an amine is reacted with a second reactant containing a Group IIIA metal to hydrogen bond, such as a metal hydride, in the presence of a metal catalyst that catalyzes dehydrocoupling of the bonds to form the precursor. Further reaction of the precursor in the presence of the catalyst forms oligomeric/polymeric forms of the precursor.Type: GrantFiled: September 15, 1986Date of Patent: January 31, 1989Assignee: SRI InternationalInventors: Yigal D. Blum, Richard M. Laine